diff --git a/Documentation/admin-guide/sysctl/kernel.rst b/Documentation/admin-guide/sysctl/kernel.rst
index 835c8844bba48..98d1b198b2b4c 100644
--- a/Documentation/admin-guide/sysctl/kernel.rst
+++ b/Documentation/admin-guide/sysctl/kernel.rst
@@ -65,6 +65,11 @@ combining the following values:
4 s3_beep
= =======
+arch
+====
+
+The machine hardware name, the same output as ``uname -m``
+(e.g. ``x86_64`` or ``aarch64``).
auto_msgmni
===========
diff --git a/arch/alpha/configs/defconfig b/arch/alpha/configs/defconfig
index 7e93369308800..6a39fe8ce9e5f 100644
--- a/arch/alpha/configs/defconfig
+++ b/arch/alpha/configs/defconfig
@@ -65,7 +65,7 @@ CONFIG_NFSD=m
CONFIG_NLS_CODEPAGE_437=y
CONFIG_MAGIC_SYSRQ=y
CONFIG_DEBUG_KERNEL=y
-CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
CONFIG_ALPHA_LEGACY_START_ADDRESS=y
CONFIG_MATHEMU=y
CONFIG_CRYPTO_HMAC=y
diff --git a/arch/alpha/include/asm/processor.h b/arch/alpha/include/asm/processor.h
index 43e234c518b1c..714abe494e5fd 100644
--- a/arch/alpha/include/asm/processor.h
+++ b/arch/alpha/include/asm/processor.h
@@ -36,8 +36,6 @@ extern void start_thread(struct pt_regs *, unsigned long, unsigned long);
/* Free all resources held by a thread. */
struct task_struct;
-extern void release_thread(struct task_struct *);
-
unsigned long __get_wchan(struct task_struct *p);
#define KSTK_EIP(tsk) (task_pt_regs(tsk)->pc)
diff --git a/arch/alpha/kernel/process.c b/arch/alpha/kernel/process.c
index e2e25f8b5e76c..dbf1bc5e2ad25 100644
--- a/arch/alpha/kernel/process.c
+++ b/arch/alpha/kernel/process.c
@@ -225,11 +225,6 @@ flush_thread(void)
current_thread_info()->pcb.unique = 0;
}
-void
-release_thread(struct task_struct *dead_task)
-{
-}
-
/*
* Copy architecture-specific thread state
*/
diff --git a/arch/alpha/kernel/setup.c b/arch/alpha/kernel/setup.c
index b4fbbba30aa2b..33bf3a6270027 100644
--- a/arch/alpha/kernel/setup.c
+++ b/arch/alpha/kernel/setup.c
@@ -491,9 +491,9 @@ setup_arch(char **cmdline_p)
boot flags depending on the boot mode, we need some shorthand.
This should do for installation. */
if (strcmp(COMMAND_LINE, "INSTALL") == 0) {
- strlcpy(command_line, "root=/dev/fd0 load_ramdisk=1", sizeof command_line);
+ strscpy(command_line, "root=/dev/fd0 load_ramdisk=1", sizeof(command_line));
} else {
- strlcpy(command_line, COMMAND_LINE, sizeof command_line);
+ strscpy(command_line, COMMAND_LINE, sizeof(command_line));
}
strcpy(boot_command_line, command_line);
*cmdline_p = command_line;
diff --git a/arch/arc/configs/tb10x_defconfig b/arch/arc/configs/tb10x_defconfig
index d93b65008d4af..4a94d1684ed60 100644
--- a/arch/arc/configs/tb10x_defconfig
+++ b/arch/arc/configs/tb10x_defconfig
@@ -90,7 +90,7 @@ CONFIG_TMPFS=y
CONFIG_CONFIGFS_FS=y
# CONFIG_MISC_FILESYSTEMS is not set
# CONFIG_NETWORK_FILESYSTEMS is not set
-CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
CONFIG_STRIP_ASM_SYMS=y
CONFIG_DEBUG_FS=y
CONFIG_HEADERS_INSTALL=y
diff --git a/arch/arc/include/asm/processor.h b/arch/arc/include/asm/processor.h
index 54db9d7bb562d..fb844fce1ab67 100644
--- a/arch/arc/include/asm/processor.h
+++ b/arch/arc/include/asm/processor.h
@@ -43,9 +43,6 @@ struct task_struct;
#define task_pt_regs(p) \
((struct pt_regs *)(THREAD_SIZE + (void *)task_stack_page(p)) - 1)
-/* Free all resources held by a thread */
-#define release_thread(thread) do { } while (0)
-
/*
* A lot of busy-wait loops in SMP are based off of non-volatile data otherwise
* get optimised away by gcc
diff --git a/arch/arm/include/asm/processor.h b/arch/arm/include/asm/processor.h
index bdc35c0e8dfb9..326864f79d18f 100644
--- a/arch/arm/include/asm/processor.h
+++ b/arch/arm/include/asm/processor.h
@@ -81,9 +81,6 @@ static inline void arch_thread_struct_whitelist(unsigned long *offset,
/* Forward declaration, a strange C thing */
struct task_struct;
-/* Free all resources held by a thread. */
-extern void release_thread(struct task_struct *);
-
unsigned long __get_wchan(struct task_struct *p);
#define task_pt_regs(p) \
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index 3d9cace638840..712d3e6d9be90 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -232,10 +232,6 @@ void flush_thread(void)
thread_notify(THREAD_NOTIFY_FLUSH, thread);
}
-void release_thread(struct task_struct *dead_task)
-{
-}
-
asmlinkage void ret_from_fork(void) __asm__("ret_from_fork");
int copy_thread(struct task_struct *p, const struct kernel_clone_args *args)
diff --git a/arch/arm64/include/asm/processor.h b/arch/arm64/include/asm/processor.h
index 61883518fc50b..445aa3af3b762 100644
--- a/arch/arm64/include/asm/processor.h
+++ b/arch/arm64/include/asm/processor.h
@@ -323,9 +323,6 @@ static inline bool is_ttbr1_addr(unsigned long addr)
/* Forward declaration, a strange C thing */
struct task_struct;
-/* Free all resources held by a thread. */
-extern void release_thread(struct task_struct *);
-
unsigned long __get_wchan(struct task_struct *p);
void update_sctlr_el1(u64 sctlr);
diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c
index 92bcc1768f0b9..9015f49c206ef 100644
--- a/arch/arm64/kernel/process.c
+++ b/arch/arm64/kernel/process.c
@@ -279,10 +279,6 @@ void flush_thread(void)
flush_tagged_addr_state();
}
-void release_thread(struct task_struct *dead_task)
-{
-}
-
void arch_release_task_struct(struct task_struct *tsk)
{
fpsimd_release_task(tsk);
diff --git a/arch/csky/include/asm/processor.h b/arch/csky/include/asm/processor.h
index 9638206bc44f7..63ad71fab30d7 100644
--- a/arch/csky/include/asm/processor.h
+++ b/arch/csky/include/asm/processor.h
@@ -69,11 +69,6 @@ do { \
/* Forward declaration, a strange C thing */
struct task_struct;
-/* Free all resources held by a thread. */
-static inline void release_thread(struct task_struct *dead_task)
-{
-}
-
/* Prepare to copy thread state - unlazy all lazy status */
#define prepare_to_copy(tsk) do { } while (0)
diff --git a/arch/hexagon/include/asm/processor.h b/arch/hexagon/include/asm/processor.h
index 615f7e49968e6..0cd39c2cdf8f7 100644
--- a/arch/hexagon/include/asm/processor.h
+++ b/arch/hexagon/include/asm/processor.h
@@ -60,10 +60,6 @@ struct thread_struct {
#define KSTK_EIP(tsk) (pt_elr(task_pt_regs(tsk)))
#define KSTK_ESP(tsk) (pt_psp(task_pt_regs(tsk)))
-/* Free all resources held by a thread; defined in process.c */
-extern void release_thread(struct task_struct *dead_task);
-
-/* Get wait channel for task P. */
extern unsigned long __get_wchan(struct task_struct *p);
/* The following stuff is pretty HEXAGON specific. */
diff --git a/arch/hexagon/kernel/process.c b/arch/hexagon/kernel/process.c
index f0552f98a7bae..e15eeaebd7853 100644
--- a/arch/hexagon/kernel/process.c
+++ b/arch/hexagon/kernel/process.c
@@ -112,13 +112,6 @@ int copy_thread(struct task_struct *p, const struct kernel_clone_args *args)
return 0;
}
-/*
- * Release any architecture-specific resources locked by thread
- */
-void release_thread(struct task_struct *dead_task)
-{
-}
-
/*
* Some archs flush debug and FPU info here
*/
diff --git a/arch/ia64/include/asm/processor.h b/arch/ia64/include/asm/processor.h
index 757c2f6d8d4b8..d1978e0040548 100644
--- a/arch/ia64/include/asm/processor.h
+++ b/arch/ia64/include/asm/processor.h
@@ -318,13 +318,6 @@ struct thread_struct {
struct mm_struct;
struct task_struct;
-/*
- * Free all resources held by a thread. This is called after the
- * parent of DEAD_TASK has collected the exit status of the task via
- * wait().
- */
-#define release_thread(dead_task)
-
/* Get wait channel for task P. */
extern unsigned long __get_wchan (struct task_struct *p);
diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c
index fd6301eafa9d5..c057280442727 100644
--- a/arch/ia64/kernel/setup.c
+++ b/arch/ia64/kernel/setup.c
@@ -552,7 +552,7 @@ setup_arch (char **cmdline_p)
ia64_patch_vtop((u64) __start___vtop_patchlist, (u64) __end___vtop_patchlist);
*cmdline_p = __va(ia64_boot_param->command_line);
- strlcpy(boot_command_line, *cmdline_p, COMMAND_LINE_SIZE);
+ strscpy(boot_command_line, *cmdline_p, COMMAND_LINE_SIZE);
efi_init();
io_port_init();
diff --git a/arch/ia64/kernel/sys_ia64.c b/arch/ia64/kernel/sys_ia64.c
index e14db25146c22..215bf3f8cb204 100644
--- a/arch/ia64/kernel/sys_ia64.c
+++ b/arch/ia64/kernel/sys_ia64.c
@@ -166,3 +166,29 @@ ia64_mremap (unsigned long addr, unsigned long old_len, unsigned long new_len, u
force_successful_syscall_return();
return addr;
}
+
+asmlinkage long
+ia64_clock_getres(const clockid_t which_clock, struct __kernel_timespec __user *tp)
+{
+ /*
+ * ia64's clock_gettime() syscall is implemented as a vdso call
+ * fsys_clock_gettime(). Currently it handles only
+ * CLOCK_REALTIME and CLOCK_MONOTONIC. Both are based on
+ * 'ar.itc' counter which gets incremented at a constant
+ * frequency. It's usually 400MHz, ~2.5x times slower than CPU
+ * clock frequency. Which is almost a 1ns hrtimer, but not quite.
+ *
+ * Let's special-case these timers to report correct precision
+ * based on ITC frequency and not HZ frequency for supported
+ * clocks.
+ */
+ switch (which_clock) {
+ case CLOCK_REALTIME:
+ case CLOCK_MONOTONIC:
+ s64 tick_ns = DIV_ROUND_UP(NSEC_PER_SEC, local_cpu_data->itc_freq);
+ struct timespec64 rtn_tp = ns_to_timespec64(tick_ns);
+ return put_timespec64(&rtn_tp, tp);
+ }
+
+ return sys_clock_getres(which_clock, tp);
+}
diff --git a/arch/ia64/kernel/syscalls/syscall.tbl b/arch/ia64/kernel/syscalls/syscall.tbl
index 78b1d03e86e1d..72c929d9902b9 100644
--- a/arch/ia64/kernel/syscalls/syscall.tbl
+++ b/arch/ia64/kernel/syscalls/syscall.tbl
@@ -240,7 +240,7 @@
228 common timer_delete sys_timer_delete
229 common clock_settime sys_clock_settime
230 common clock_gettime sys_clock_gettime
-231 common clock_getres sys_clock_getres
+231 common clock_getres ia64_clock_getres
232 common clock_nanosleep sys_clock_nanosleep
233 common fstatfs64 sys_fstatfs64
234 common statfs64 sys_statfs64
diff --git a/arch/loongarch/include/asm/processor.h b/arch/loongarch/include/asm/processor.h
index 1c4b4308378d4..6954dc5d24e9d 100644
--- a/arch/loongarch/include/asm/processor.h
+++ b/arch/loongarch/include/asm/processor.h
@@ -176,9 +176,6 @@ struct thread_struct {
struct task_struct;
-/* Free all resources held by a thread. */
-#define release_thread(thread) do { } while (0)
-
enum idle_boot_override {IDLE_NO_OVERRIDE = 0, IDLE_HALT, IDLE_NOMWAIT, IDLE_POLL};
extern unsigned long boot_option_idle_override;
diff --git a/arch/m68k/include/asm/processor.h b/arch/m68k/include/asm/processor.h
index d86b4009880b4..7a2da780830b8 100644
--- a/arch/m68k/include/asm/processor.h
+++ b/arch/m68k/include/asm/processor.h
@@ -145,11 +145,6 @@ static inline void start_thread(struct pt_regs * regs, unsigned long pc,
/* Forward declaration, a strange C thing */
struct task_struct;
-/* Free all resources held by a thread. */
-static inline void release_thread(struct task_struct *dead_task)
-{
-}
-
unsigned long __get_wchan(struct task_struct *p);
void show_registers(struct pt_regs *regs);
diff --git a/arch/microblaze/configs/mmu_defconfig b/arch/microblaze/configs/mmu_defconfig
index 51337fffb9473..8150daf04a76c 100644
--- a/arch/microblaze/configs/mmu_defconfig
+++ b/arch/microblaze/configs/mmu_defconfig
@@ -83,7 +83,7 @@ CONFIG_CIFS=y
CONFIG_CIFS_STATS2=y
CONFIG_ENCRYPTED_KEYS=y
CONFIG_DMA_CMA=y
-CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
CONFIG_KGDB=y
CONFIG_KGDB_TESTS=y
CONFIG_KGDB_KDB=y
diff --git a/arch/microblaze/include/asm/processor.h b/arch/microblaze/include/asm/processor.h
index 7e9e92670df33..4e193c7550dfa 100644
--- a/arch/microblaze/include/asm/processor.h
+++ b/arch/microblaze/include/asm/processor.h
@@ -63,11 +63,6 @@ struct thread_struct {
.pgdir = swapper_pg_dir, \
}
-/* Free all resources held by a thread. */
-static inline void release_thread(struct task_struct *dead_task)
-{
-}
-
unsigned long __get_wchan(struct task_struct *p);
/* The size allocated for kernel stacks. This _must_ be a power of two! */
diff --git a/arch/mips/configs/bcm47xx_defconfig b/arch/mips/configs/bcm47xx_defconfig
index 91ce75edbfb46..22ffde722bb9e 100644
--- a/arch/mips/configs/bcm47xx_defconfig
+++ b/arch/mips/configs/bcm47xx_defconfig
@@ -72,7 +72,7 @@ CONFIG_LEDS_TRIGGER_TIMER=y
CONFIG_LEDS_TRIGGER_DEFAULT_ON=y
CONFIG_CRC32_SARWATE=y
CONFIG_PRINTK_TIME=y
-CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
CONFIG_DEBUG_INFO_REDUCED=y
CONFIG_STRIP_ASM_SYMS=y
CONFIG_DEBUG_FS=y
diff --git a/arch/mips/configs/cavium_octeon_defconfig b/arch/mips/configs/cavium_octeon_defconfig
index 97ceaf080c0c7..7f021a327566b 100644
--- a/arch/mips/configs/cavium_octeon_defconfig
+++ b/arch/mips/configs/cavium_octeon_defconfig
@@ -162,7 +162,7 @@ CONFIG_CRYPTO_SHA1_OCTEON=m
CONFIG_CRYPTO_SHA256_OCTEON=m
CONFIG_CRYPTO_SHA512_OCTEON=m
CONFIG_CRYPTO_DES=y
-CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
CONFIG_DEBUG_FS=y
CONFIG_MAGIC_SYSRQ=y
# CONFIG_SCHED_DEBUG is not set
diff --git a/arch/mips/configs/ci20_defconfig b/arch/mips/configs/ci20_defconfig
index e1b49f77414af..11f08b6a3013f 100644
--- a/arch/mips/configs/ci20_defconfig
+++ b/arch/mips/configs/ci20_defconfig
@@ -199,7 +199,7 @@ CONFIG_NLS_UTF8=y
CONFIG_DMA_CMA=y
CONFIG_CMA_SIZE_MBYTES=32
CONFIG_PRINTK_TIME=y
-CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
CONFIG_STRIP_ASM_SYMS=y
CONFIG_MAGIC_SYSRQ=y
CONFIG_DEBUG_FS=y
diff --git a/arch/mips/configs/cu1000-neo_defconfig b/arch/mips/configs/cu1000-neo_defconfig
index 5bd55eb32fe55..1cbc9302e1d14 100644
--- a/arch/mips/configs/cu1000-neo_defconfig
+++ b/arch/mips/configs/cu1000-neo_defconfig
@@ -113,7 +113,7 @@ CONFIG_PRINTK_TIME=y
CONFIG_CONSOLE_LOGLEVEL_DEFAULT=15
CONFIG_CONSOLE_LOGLEVEL_QUIET=15
CONFIG_MESSAGE_LOGLEVEL_DEFAULT=7
-CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
CONFIG_STRIP_ASM_SYMS=y
CONFIG_MAGIC_SYSRQ=y
CONFIG_DEBUG_FS=y
diff --git a/arch/mips/configs/cu1830-neo_defconfig b/arch/mips/configs/cu1830-neo_defconfig
index cc69688962e8c..a0f73f3cd6ce7 100644
--- a/arch/mips/configs/cu1830-neo_defconfig
+++ b/arch/mips/configs/cu1830-neo_defconfig
@@ -116,7 +116,7 @@ CONFIG_PRINTK_TIME=y
CONFIG_CONSOLE_LOGLEVEL_DEFAULT=15
CONFIG_CONSOLE_LOGLEVEL_QUIET=15
CONFIG_MESSAGE_LOGLEVEL_DEFAULT=7
-CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
CONFIG_STRIP_ASM_SYMS=y
CONFIG_MAGIC_SYSRQ=y
CONFIG_DEBUG_FS=y
diff --git a/arch/mips/configs/generic_defconfig b/arch/mips/configs/generic_defconfig
index 714169e411cf0..bbc0d9b1c3983 100644
--- a/arch/mips/configs/generic_defconfig
+++ b/arch/mips/configs/generic_defconfig
@@ -83,7 +83,7 @@ CONFIG_ROOT_NFS=y
# CONFIG_XZ_DEC_ARMTHUMB is not set
# CONFIG_XZ_DEC_SPARC is not set
CONFIG_PRINTK_TIME=y
-CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
CONFIG_DEBUG_INFO_REDUCED=y
CONFIG_DEBUG_FS=y
# CONFIG_SCHED_DEBUG is not set
diff --git a/arch/mips/configs/omega2p_defconfig b/arch/mips/configs/omega2p_defconfig
index fc39ddf610a9b..6a5cb2d6de6b0 100644
--- a/arch/mips/configs/omega2p_defconfig
+++ b/arch/mips/configs/omega2p_defconfig
@@ -116,7 +116,7 @@ CONFIG_CRYPTO_LZO=y
CONFIG_CRC16=y
CONFIG_XZ_DEC=y
CONFIG_PRINTK_TIME=y
-CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
CONFIG_STRIP_ASM_SYMS=y
CONFIG_DEBUG_FS=y
CONFIG_MAGIC_SYSRQ=y
diff --git a/arch/mips/configs/qi_lb60_defconfig b/arch/mips/configs/qi_lb60_defconfig
index b4448d0876d57..7e5d9741bd5dd 100644
--- a/arch/mips/configs/qi_lb60_defconfig
+++ b/arch/mips/configs/qi_lb60_defconfig
@@ -166,7 +166,7 @@ CONFIG_NLS_UTF8=y
CONFIG_FONTS=y
CONFIG_FONT_SUN8x16=y
CONFIG_PRINTK_TIME=y
-CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
CONFIG_STRIP_ASM_SYMS=y
CONFIG_READABLE_ASM=y
CONFIG_KGDB=y
diff --git a/arch/mips/configs/vocore2_defconfig b/arch/mips/configs/vocore2_defconfig
index a14f8ea5c3867..302cab9bd7bd3 100644
--- a/arch/mips/configs/vocore2_defconfig
+++ b/arch/mips/configs/vocore2_defconfig
@@ -116,7 +116,7 @@ CONFIG_CRYPTO_LZO=y
CONFIG_CRC16=y
CONFIG_XZ_DEC=y
CONFIG_PRINTK_TIME=y
-CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
CONFIG_STRIP_ASM_SYMS=y
CONFIG_DEBUG_FS=y
CONFIG_MAGIC_SYSRQ=y
diff --git a/arch/mips/include/asm/processor.h b/arch/mips/include/asm/processor.h
index 4bb24579d12e4..3fde1ff72bd16 100644
--- a/arch/mips/include/asm/processor.h
+++ b/arch/mips/include/asm/processor.h
@@ -344,9 +344,6 @@ struct thread_struct {
struct task_struct;
-/* Free all resources held by a thread. */
-#define release_thread(thread) do { } while(0)
-
/*
* Do necessary setup to start up a newly executed thread.
*/
diff --git a/arch/nios2/configs/10m50_defconfig b/arch/nios2/configs/10m50_defconfig
index a7967b4cfb6ed..91c3fce4dc7fe 100644
--- a/arch/nios2/configs/10m50_defconfig
+++ b/arch/nios2/configs/10m50_defconfig
@@ -74,4 +74,4 @@ CONFIG_NFS_FS=y
CONFIG_NFS_V3_ACL=y
CONFIG_ROOT_NFS=y
CONFIG_SUNRPC_DEBUG=y
-CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
diff --git a/arch/nios2/configs/3c120_defconfig b/arch/nios2/configs/3c120_defconfig
index 423a0c40a1627..c42ad7e162a36 100644
--- a/arch/nios2/configs/3c120_defconfig
+++ b/arch/nios2/configs/3c120_defconfig
@@ -71,4 +71,4 @@ CONFIG_NFS_FS=y
CONFIG_NFS_V3_ACL=y
CONFIG_ROOT_NFS=y
CONFIG_SUNRPC_DEBUG=y
-CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
diff --git a/arch/nios2/include/asm/processor.h b/arch/nios2/include/asm/processor.h
index b8125dfbcad2d..8916d93d5c2d0 100644
--- a/arch/nios2/include/asm/processor.h
+++ b/arch/nios2/include/asm/processor.h
@@ -64,11 +64,6 @@ extern void start_thread(struct pt_regs *regs, unsigned long pc,
struct task_struct;
-/* Free all resources held by a thread. */
-static inline void release_thread(struct task_struct *dead_task)
-{
-}
-
extern unsigned long __get_wchan(struct task_struct *p);
#define task_pt_regs(p) \
diff --git a/arch/openrisc/include/asm/processor.h b/arch/openrisc/include/asm/processor.h
index aa1699c18add8..ed9efb430afa1 100644
--- a/arch/openrisc/include/asm/processor.h
+++ b/arch/openrisc/include/asm/processor.h
@@ -72,7 +72,6 @@ struct thread_struct {
void start_thread(struct pt_regs *regs, unsigned long nip, unsigned long sp);
-void release_thread(struct task_struct *);
unsigned long __get_wchan(struct task_struct *p);
#define cpu_relax() barrier()
diff --git a/arch/openrisc/kernel/process.c b/arch/openrisc/kernel/process.c
index 52dc983ddeba3..f94b5ec06786e 100644
--- a/arch/openrisc/kernel/process.c
+++ b/arch/openrisc/kernel/process.c
@@ -125,10 +125,6 @@ void show_regs(struct pt_regs *regs)
show_registers(regs);
}
-void release_thread(struct task_struct *dead_task)
-{
-}
-
/*
* Copy the thread-specific (arch specific) info from the current
* process to the new one p
diff --git a/arch/parisc/include/asm/processor.h b/arch/parisc/include/asm/processor.h
index 4621ceb513147..a608970b249af 100644
--- a/arch/parisc/include/asm/processor.h
+++ b/arch/parisc/include/asm/processor.h
@@ -266,9 +266,6 @@ on downward growing arches, it looks like this:
struct mm_struct;
-/* Free all resources held by a thread. */
-extern void release_thread(struct task_struct *);
-
extern unsigned long __get_wchan(struct task_struct *p);
#define KSTK_EIP(tsk) ((tsk)->thread.regs.iaoq[0])
diff --git a/arch/parisc/kernel/process.c b/arch/parisc/kernel/process.c
index 7c37e09c92da6..3db0e97e6c066 100644
--- a/arch/parisc/kernel/process.c
+++ b/arch/parisc/kernel/process.c
@@ -146,10 +146,6 @@ void flush_thread(void)
*/
}
-void release_thread(struct task_struct *dead_task)
-{
-}
-
/*
* Idle thread support
*
diff --git a/arch/powerpc/include/asm/processor.h b/arch/powerpc/include/asm/processor.h
index 97a77b37daa3a..66645629154b3 100644
--- a/arch/powerpc/include/asm/processor.h
+++ b/arch/powerpc/include/asm/processor.h
@@ -75,7 +75,6 @@ extern int _chrp_type;
struct task_struct;
void start_thread(struct pt_regs *regs, unsigned long fdptr, unsigned long sp);
-void release_thread(struct task_struct *);
#define TS_FPR(i) fp_state.fpr[i][TS_FPROFFSET]
#define TS_CKFPR(i) ckfp_state.fpr[i][TS_FPROFFSET]
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 0fbda89cd1bb5..991cda25b9a9e 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -1655,11 +1655,6 @@ EXPORT_SYMBOL_GPL(set_thread_tidr);
#endif /* CONFIG_PPC64 */
-void
-release_thread(struct task_struct *t)
-{
-}
-
/*
* this gets called so that we can store coprocessor state into memory and
* copy the current task into the new thread.
diff --git a/arch/riscv/include/asm/processor.h b/arch/riscv/include/asm/processor.h
index 19eedd4af4cde..94a0590c69710 100644
--- a/arch/riscv/include/asm/processor.h
+++ b/arch/riscv/include/asm/processor.h
@@ -65,11 +65,6 @@ static inline void arch_thread_struct_whitelist(unsigned long *offset,
extern void start_thread(struct pt_regs *regs,
unsigned long pc, unsigned long sp);
-/* Free all resources held by a thread. */
-static inline void release_thread(struct task_struct *dead_task)
-{
-}
-
extern unsigned long __get_wchan(struct task_struct *p);
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h
index 4eb9b7875e132..87be3e855bf72 100644
--- a/arch/s390/include/asm/processor.h
+++ b/arch/s390/include/asm/processor.h
@@ -186,9 +186,6 @@ struct pt_regs;
void show_registers(struct pt_regs *regs);
void show_cacheinfo(struct seq_file *m);
-/* Free all resources held by a thread. */
-static inline void release_thread(struct task_struct *tsk) { }
-
/* Free guarded storage control block */
void guarded_storage_release(struct task_struct *tsk);
void gs_load_bc_cb(struct pt_regs *regs);
diff --git a/arch/sh/configs/apsh4a3a_defconfig b/arch/sh/configs/apsh4a3a_defconfig
index 530498f189904..99931a13a74da 100644
--- a/arch/sh/configs/apsh4a3a_defconfig
+++ b/arch/sh/configs/apsh4a3a_defconfig
@@ -85,7 +85,7 @@ CONFIG_DEBUG_FS=y
CONFIG_DEBUG_KERNEL=y
# CONFIG_DEBUG_PREEMPT is not set
# CONFIG_DEBUG_BUGVERBOSE is not set
-CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
# CONFIG_FTRACE is not set
# CONFIG_CRYPTO_ANSI_CPRNG is not set
# CONFIG_CRYPTO_HW is not set
diff --git a/arch/sh/configs/apsh4ad0a_defconfig b/arch/sh/configs/apsh4ad0a_defconfig
index 6abd9bd701061..d9fb124bf015a 100644
--- a/arch/sh/configs/apsh4ad0a_defconfig
+++ b/arch/sh/configs/apsh4ad0a_defconfig
@@ -116,7 +116,7 @@ CONFIG_MAGIC_SYSRQ=y
CONFIG_DEBUG_KERNEL=y
CONFIG_DEBUG_SHIRQ=y
CONFIG_DETECT_HUNG_TASK=y
-CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
CONFIG_DEBUG_VM=y
CONFIG_DWARF_UNWINDER=y
# CONFIG_CRYPTO_ANSI_CPRNG is not set
diff --git a/arch/sh/configs/edosk7760_defconfig b/arch/sh/configs/edosk7760_defconfig
index d77f54e906fd0..f427a95bcd21e 100644
--- a/arch/sh/configs/edosk7760_defconfig
+++ b/arch/sh/configs/edosk7760_defconfig
@@ -107,7 +107,7 @@ CONFIG_DEBUG_SHIRQ=y
CONFIG_DETECT_HUNG_TASK=y
# CONFIG_SCHED_DEBUG is not set
CONFIG_TIMER_STATS=y
-CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
CONFIG_CRYPTO=y
CONFIG_CRYPTO_MD5=y
CONFIG_CRYPTO_DES=y
diff --git a/arch/sh/configs/magicpanelr2_defconfig b/arch/sh/configs/magicpanelr2_defconfig
index 0989ed9295408..ef1d98e35c91f 100644
--- a/arch/sh/configs/magicpanelr2_defconfig
+++ b/arch/sh/configs/magicpanelr2_defconfig
@@ -84,7 +84,7 @@ CONFIG_MAGIC_SYSRQ=y
CONFIG_DEBUG_KERNEL=y
# CONFIG_SCHED_DEBUG is not set
CONFIG_DEBUG_KOBJECT=y
-CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
CONFIG_FRAME_POINTER=y
CONFIG_CRC_CCITT=m
CONFIG_CRC16=m
diff --git a/arch/sh/configs/polaris_defconfig b/arch/sh/configs/polaris_defconfig
index 246408ec7462b..f42e4867ddc1a 100644
--- a/arch/sh/configs/polaris_defconfig
+++ b/arch/sh/configs/polaris_defconfig
@@ -79,5 +79,5 @@ CONFIG_DETECT_HUNG_TASK=y
CONFIG_DEBUG_RT_MUTEXES=y
CONFIG_DEBUG_LOCK_ALLOC=y
CONFIG_DEBUG_SPINLOCK_SLEEP=y
-CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
CONFIG_DEBUG_SG=y
diff --git a/arch/sh/configs/r7780mp_defconfig b/arch/sh/configs/r7780mp_defconfig
index f823cc6b18f91..e527cd60a1910 100644
--- a/arch/sh/configs/r7780mp_defconfig
+++ b/arch/sh/configs/r7780mp_defconfig
@@ -101,7 +101,7 @@ CONFIG_DEBUG_FS=y
CONFIG_DEBUG_KERNEL=y
CONFIG_DETECT_HUNG_TASK=y
# CONFIG_DEBUG_PREEMPT is not set
-CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
CONFIG_CRYPTO_ECB=m
CONFIG_CRYPTO_PCBC=m
CONFIG_CRYPTO_HMAC=y
diff --git a/arch/sh/configs/r7785rp_defconfig b/arch/sh/configs/r7785rp_defconfig
index f96bc20d4b1ac..a3f952a83d970 100644
--- a/arch/sh/configs/r7785rp_defconfig
+++ b/arch/sh/configs/r7785rp_defconfig
@@ -96,7 +96,7 @@ CONFIG_DEBUG_KERNEL=y
# CONFIG_DEBUG_PREEMPT is not set
CONFIG_DEBUG_LOCK_ALLOC=y
CONFIG_DEBUG_LOCKING_API_SELFTESTS=y
-CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
CONFIG_SH_STANDARD_BIOS=y
CONFIG_DEBUG_STACK_USAGE=y
CONFIG_4KSTACKS=y
diff --git a/arch/sh/configs/rsk7203_defconfig b/arch/sh/configs/rsk7203_defconfig
index 5a54e2b883f0a..d00fafc021e1a 100644
--- a/arch/sh/configs/rsk7203_defconfig
+++ b/arch/sh/configs/rsk7203_defconfig
@@ -112,7 +112,7 @@ CONFIG_DETECT_HUNG_TASK=y
CONFIG_DEBUG_OBJECTS=y
CONFIG_DEBUG_MUTEXES=y
CONFIG_DEBUG_SPINLOCK_SLEEP=y
-CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
CONFIG_DEBUG_VM=y
CONFIG_DEBUG_LIST=y
CONFIG_DEBUG_SG=y
diff --git a/arch/sh/configs/sdk7780_defconfig b/arch/sh/configs/sdk7780_defconfig
index 7d6d323598480..41cb588ca99cb 100644
--- a/arch/sh/configs/sdk7780_defconfig
+++ b/arch/sh/configs/sdk7780_defconfig
@@ -131,7 +131,7 @@ CONFIG_DEBUG_KERNEL=y
CONFIG_DETECT_HUNG_TASK=y
# CONFIG_SCHED_DEBUG is not set
CONFIG_TIMER_STATS=y
-CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
CONFIG_SH_STANDARD_BIOS=y
CONFIG_CRYPTO_MD5=y
CONFIG_CRYPTO_DES=y
diff --git a/arch/sh/configs/se7712_defconfig b/arch/sh/configs/se7712_defconfig
index ee6d28ae08deb..36356223d51c8 100644
--- a/arch/sh/configs/se7712_defconfig
+++ b/arch/sh/configs/se7712_defconfig
@@ -93,7 +93,7 @@ CONFIG_CRAMFS=y
CONFIG_NFS_FS=y
CONFIG_ROOT_NFS=y
CONFIG_DEBUG_KERNEL=y
-CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
CONFIG_FRAME_POINTER=y
CONFIG_CRYPTO_ECB=m
CONFIG_CRYPTO_PCBC=m
diff --git a/arch/sh/configs/se7721_defconfig b/arch/sh/configs/se7721_defconfig
index bad921bc10f8f..46c5a263a2392 100644
--- a/arch/sh/configs/se7721_defconfig
+++ b/arch/sh/configs/se7721_defconfig
@@ -121,7 +121,7 @@ CONFIG_NLS_CODEPAGE_437=y
CONFIG_NLS_CODEPAGE_932=y
CONFIG_NLS_ISO8859_1=y
CONFIG_DEBUG_KERNEL=y
-CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
CONFIG_FRAME_POINTER=y
# CONFIG_CRYPTO_ANSI_CPRNG is not set
CONFIG_CRC_CCITT=y
diff --git a/arch/sh/configs/sh2007_defconfig b/arch/sh/configs/sh2007_defconfig
index 79f02f1c0dc83..259c69e3fa227 100644
--- a/arch/sh/configs/sh2007_defconfig
+++ b/arch/sh/configs/sh2007_defconfig
@@ -159,7 +159,7 @@ CONFIG_DEBUG_FS=y
CONFIG_DEBUG_KERNEL=y
# CONFIG_DETECT_SOFTLOCKUP is not set
# CONFIG_SCHED_DEBUG is not set
-CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
CONFIG_FRAME_POINTER=y
CONFIG_SH_STANDARD_BIOS=y
CONFIG_CRYPTO_NULL=y
diff --git a/arch/sh/configs/sh7757lcr_defconfig b/arch/sh/configs/sh7757lcr_defconfig
index a2700ab165afb..2579dc4bc0c8f 100644
--- a/arch/sh/configs/sh7757lcr_defconfig
+++ b/arch/sh/configs/sh7757lcr_defconfig
@@ -80,6 +80,6 @@ CONFIG_NLS_ISO8859_1=y
CONFIG_DEBUG_KERNEL=y
# CONFIG_SCHED_DEBUG is not set
# CONFIG_DEBUG_BUGVERBOSE is not set
-CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
# CONFIG_FTRACE is not set
# CONFIG_CRYPTO_ANSI_CPRNG is not set
diff --git a/arch/sh/configs/sh7785lcr_32bit_defconfig b/arch/sh/configs/sh7785lcr_32bit_defconfig
index 7eb3c10f28ad2..781ff13227fc9 100644
--- a/arch/sh/configs/sh7785lcr_32bit_defconfig
+++ b/arch/sh/configs/sh7785lcr_32bit_defconfig
@@ -141,7 +141,7 @@ CONFIG_DEBUG_KMEMLEAK=y
CONFIG_DEBUG_SPINLOCK=y
CONFIG_DEBUG_MUTEXES=y
CONFIG_DEBUG_SPINLOCK_SLEEP=y
-CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
CONFIG_LATENCYTOP=y
# CONFIG_FTRACE is not set
CONFIG_CRYPTO_HMAC=y
diff --git a/arch/sh/configs/urquell_defconfig b/arch/sh/configs/urquell_defconfig
index cb2f56468fe02..ea773c764c5a8 100644
--- a/arch/sh/configs/urquell_defconfig
+++ b/arch/sh/configs/urquell_defconfig
@@ -139,7 +139,7 @@ CONFIG_PRINTK_TIME=y
CONFIG_DEBUG_FS=y
CONFIG_DEBUG_KERNEL=y
CONFIG_DETECT_HUNG_TASK=y
-CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
CONFIG_FRAME_POINTER=y
# CONFIG_FTRACE is not set
# CONFIG_DUMP_CODE is not set
diff --git a/arch/sh/include/asm/processor_32.h b/arch/sh/include/asm/processor_32.h
index 45240ec6b85a4..27aebf1e75a20 100644
--- a/arch/sh/include/asm/processor_32.h
+++ b/arch/sh/include/asm/processor_32.h
@@ -127,9 +127,6 @@ struct task_struct;
extern void start_thread(struct pt_regs *regs, unsigned long new_pc, unsigned long new_sp);
-/* Free all resources held by a thread. */
-extern void release_thread(struct task_struct *);
-
/*
* FPU lazy state save handling.
*/
diff --git a/arch/sh/kernel/process_32.c b/arch/sh/kernel/process_32.c
index a808843375e71..92b6649d49295 100644
--- a/arch/sh/kernel/process_32.c
+++ b/arch/sh/kernel/process_32.c
@@ -84,11 +84,6 @@ void flush_thread(void)
#endif
}
-void release_thread(struct task_struct *dead_task)
-{
- /* do nothing */
-}
-
asmlinkage void ret_from_fork(void);
asmlinkage void ret_from_kernel_thread(void);
diff --git a/arch/sparc/include/asm/processor_32.h b/arch/sparc/include/asm/processor_32.h
index b26c35336b51d..ba8b70ffec085 100644
--- a/arch/sparc/include/asm/processor_32.h
+++ b/arch/sparc/include/asm/processor_32.h
@@ -80,9 +80,6 @@ static inline void start_thread(struct pt_regs * regs, unsigned long pc,
: "memory");
}
-/* Free all resources held by a thread. */
-#define release_thread(tsk) do { } while(0)
-
unsigned long __get_wchan(struct task_struct *);
#define task_pt_regs(tsk) ((tsk)->thread.kregs)
diff --git a/arch/sparc/include/asm/processor_64.h b/arch/sparc/include/asm/processor_64.h
index 89850dff6b033..2667f35d5ea56 100644
--- a/arch/sparc/include/asm/processor_64.h
+++ b/arch/sparc/include/asm/processor_64.h
@@ -176,9 +176,6 @@ do { \
regs->tstate &= ~TSTATE_PEF; \
} while (0)
-/* Free all resources held by a thread. */
-#define release_thread(tsk) do { } while (0)
-
unsigned long __get_wchan(struct task_struct *task);
#define task_pt_regs(tsk) (task_thread_info(tsk)->kregs)
diff --git a/arch/um/configs/i386_defconfig b/arch/um/configs/i386_defconfig
index fb51bd206dbed..c0162286d68b7 100644
--- a/arch/um/configs/i386_defconfig
+++ b/arch/um/configs/i386_defconfig
@@ -69,5 +69,5 @@ CONFIG_JOLIET=y
CONFIG_PROC_KCORE=y
CONFIG_TMPFS=y
CONFIG_NLS=y
-CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
CONFIG_DEBUG_KERNEL=y
diff --git a/arch/um/configs/x86_64_defconfig b/arch/um/configs/x86_64_defconfig
index 477b873174243..bec6e5d956873 100644
--- a/arch/um/configs/x86_64_defconfig
+++ b/arch/um/configs/x86_64_defconfig
@@ -67,6 +67,6 @@ CONFIG_JOLIET=y
CONFIG_PROC_KCORE=y
CONFIG_TMPFS=y
CONFIG_NLS=y
-CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
CONFIG_FRAME_WARN=1024
CONFIG_DEBUG_KERNEL=y
diff --git a/arch/um/include/asm/processor-generic.h b/arch/um/include/asm/processor-generic.h
index d0fc1862da957..bb5f06480da95 100644
--- a/arch/um/include/asm/processor-generic.h
+++ b/arch/um/include/asm/processor-generic.h
@@ -55,10 +55,6 @@ struct thread_struct {
.request = { 0 } \
}
-static inline void release_thread(struct task_struct *task)
-{
-}
-
/*
* User space process size: 3GB (default).
*/
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index 356308c739514..67c9d73b31faa 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -587,9 +587,6 @@ static inline void load_sp0(unsigned long sp0)
#endif /* CONFIG_PARAVIRT_XXL */
-/* Free all resources held by a thread. */
-extern void release_thread(struct task_struct *);
-
unsigned long __get_wchan(struct task_struct *p);
/*
diff --git a/arch/xtensa/configs/audio_kc705_defconfig b/arch/xtensa/configs/audio_kc705_defconfig
index 3be62da8089b8..ef0ebcfbccf91 100644
--- a/arch/xtensa/configs/audio_kc705_defconfig
+++ b/arch/xtensa/configs/audio_kc705_defconfig
@@ -120,7 +120,7 @@ CONFIG_NLS_CODEPAGE_437=y
CONFIG_NLS_ISO8859_1=y
CONFIG_PRINTK_TIME=y
CONFIG_DYNAMIC_DEBUG=y
-CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
CONFIG_MAGIC_SYSRQ=y
CONFIG_LOCKUP_DETECTOR=y
# CONFIG_SCHED_DEBUG is not set
diff --git a/arch/xtensa/configs/cadence_csp_defconfig b/arch/xtensa/configs/cadence_csp_defconfig
index fc240737b14de..2665962d247a7 100644
--- a/arch/xtensa/configs/cadence_csp_defconfig
+++ b/arch/xtensa/configs/cadence_csp_defconfig
@@ -100,7 +100,7 @@ CONFIG_NLS_CODEPAGE_437=y
CONFIG_NLS_ISO8859_1=y
CONFIG_PRINTK_TIME=y
CONFIG_DYNAMIC_DEBUG=y
-CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
CONFIG_MAGIC_SYSRQ=y
CONFIG_LOCKUP_DETECTOR=y
# CONFIG_SCHED_DEBUG is not set
diff --git a/arch/xtensa/configs/generic_kc705_defconfig b/arch/xtensa/configs/generic_kc705_defconfig
index e9d6b6f6eca11..236c7f23cc10a 100644
--- a/arch/xtensa/configs/generic_kc705_defconfig
+++ b/arch/xtensa/configs/generic_kc705_defconfig
@@ -107,7 +107,7 @@ CONFIG_NLS_CODEPAGE_437=y
CONFIG_NLS_ISO8859_1=y
CONFIG_PRINTK_TIME=y
CONFIG_DYNAMIC_DEBUG=y
-CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
CONFIG_MAGIC_SYSRQ=y
CONFIG_LOCKUP_DETECTOR=y
# CONFIG_SCHED_DEBUG is not set
diff --git a/arch/xtensa/configs/nommu_kc705_defconfig b/arch/xtensa/configs/nommu_kc705_defconfig
index fcb620ef37997..8263da9e078d7 100644
--- a/arch/xtensa/configs/nommu_kc705_defconfig
+++ b/arch/xtensa/configs/nommu_kc705_defconfig
@@ -105,7 +105,7 @@ CONFIG_NLS_CODEPAGE_437=y
CONFIG_NLS_ISO8859_1=y
CONFIG_PRINTK_TIME=y
CONFIG_DYNAMIC_DEBUG=y
-CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
# CONFIG_FRAME_POINTER is not set
CONFIG_MAGIC_SYSRQ=y
CONFIG_DEBUG_VM=y
diff --git a/arch/xtensa/configs/smp_lx200_defconfig b/arch/xtensa/configs/smp_lx200_defconfig
index a47c85638ec11..7bdffa3a69c60 100644
--- a/arch/xtensa/configs/smp_lx200_defconfig
+++ b/arch/xtensa/configs/smp_lx200_defconfig
@@ -111,7 +111,7 @@ CONFIG_NLS_CODEPAGE_437=y
CONFIG_NLS_ISO8859_1=y
CONFIG_PRINTK_TIME=y
CONFIG_DYNAMIC_DEBUG=y
-CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
CONFIG_MAGIC_SYSRQ=y
CONFIG_DEBUG_VM=y
CONFIG_LOCKUP_DETECTOR=y
diff --git a/arch/xtensa/configs/virt_defconfig b/arch/xtensa/configs/virt_defconfig
index 6d1387dfa96fc..98acb7191cb77 100644
--- a/arch/xtensa/configs/virt_defconfig
+++ b/arch/xtensa/configs/virt_defconfig
@@ -97,7 +97,7 @@ CONFIG_CRYPTO_DEV_VIRTIO=y
CONFIG_FONTS=y
CONFIG_PRINTK_TIME=y
CONFIG_DYNAMIC_DEBUG=y
-CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
CONFIG_MAGIC_SYSRQ=y
# CONFIG_SCHED_DEBUG is not set
CONFIG_SCHEDSTATS=y
diff --git a/arch/xtensa/configs/xip_kc705_defconfig b/arch/xtensa/configs/xip_kc705_defconfig
index 062148e171351..1c3cebaaa71ba 100644
--- a/arch/xtensa/configs/xip_kc705_defconfig
+++ b/arch/xtensa/configs/xip_kc705_defconfig
@@ -102,7 +102,7 @@ CONFIG_CRYPTO_LZO=y
CONFIG_CRYPTO_ANSI_CPRNG=y
CONFIG_PRINTK_TIME=y
CONFIG_DYNAMIC_DEBUG=y
-CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
CONFIG_MAGIC_SYSRQ=y
CONFIG_DETECT_HUNG_TASK=y
# CONFIG_SCHED_DEBUG is not set
diff --git a/arch/xtensa/include/asm/processor.h b/arch/xtensa/include/asm/processor.h
index b75ba16ec0802..228e4dff5fb2d 100644
--- a/arch/xtensa/include/asm/processor.h
+++ b/arch/xtensa/include/asm/processor.h
@@ -224,9 +224,6 @@ struct thread_struct {
struct task_struct;
struct mm_struct;
-/* Free all resources held by a thread. */
-#define release_thread(thread) do { } while(0)
-
extern unsigned long __get_wchan(struct task_struct *p);
#define KSTK_EIP(tsk) (task_pt_regs(tsk)->pc)
diff --git a/fs/aio.c b/fs/aio.c
index 606613e9d1f4f..5b2ff20ad3229 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -951,16 +951,13 @@ static bool __get_reqs_available(struct kioctx *ctx)
local_irq_save(flags);
kcpu = this_cpu_ptr(ctx->cpu);
if (!kcpu->reqs_available) {
- int old, avail = atomic_read(&ctx->reqs_available);
+ int avail = atomic_read(&ctx->reqs_available);
do {
if (avail < ctx->req_batch)
goto out;
-
- old = avail;
- avail = atomic_cmpxchg(&ctx->reqs_available,
- avail, avail - ctx->req_batch);
- } while (avail != old);
+ } while (!atomic_try_cmpxchg(&ctx->reqs_available,
+ &avail, avail - ctx->req_batch));
kcpu->reqs_available += ctx->req_batch;
}
diff --git a/fs/buffer.c b/fs/buffer.c
index b4c9fff3ab6c9..4b1b6b6ddc7ce 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -1453,19 +1453,15 @@ EXPORT_SYMBOL(set_bh_page);
static void discard_buffer(struct buffer_head * bh)
{
- unsigned long b_state, b_state_old;
+ unsigned long b_state;
lock_buffer(bh);
clear_buffer_dirty(bh);
bh->b_bdev = NULL;
- b_state = bh->b_state;
- for (;;) {
- b_state_old = cmpxchg(&bh->b_state, b_state,
- (b_state & ~BUFFER_FLAGS_DISCARD));
- if (b_state_old == b_state)
- break;
- b_state = b_state_old;
- }
+ b_state = READ_ONCE(bh->b_state);
+ do {
+ } while (!try_cmpxchg(&bh->b_state, &b_state,
+ b_state & ~BUFFER_FLAGS_DISCARD));
unlock_buffer(bh);
}
diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index 8b56b94e2f56f..52954d4637b54 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -1065,7 +1065,7 @@ static inline bool list_add_tail_lockless(struct list_head *new,
* added to the list from another CPU: the winner observes
* new->next == new.
*/
- if (cmpxchg(&new->next, new, head) != new)
+ if (!try_cmpxchg(&new->next, &new, head))
return false;
/*
diff --git a/fs/hfs/bnode.c b/fs/hfs/bnode.c
index c83fd0e8404d3..2015e42e752a6 100644
--- a/fs/hfs/bnode.c
+++ b/fs/hfs/bnode.c
@@ -21,7 +21,6 @@ void hfs_bnode_read(struct hfs_bnode *node, void *buf, int off, int len)
int pagenum;
int bytes_read;
int bytes_to_read;
- void *vaddr;
off += node->page_offset;
pagenum = off >> PAGE_SHIFT;
@@ -33,9 +32,7 @@ void hfs_bnode_read(struct hfs_bnode *node, void *buf, int off, int len)
page = node->page[pagenum];
bytes_to_read = min_t(int, len - bytes_read, PAGE_SIZE - off);
- vaddr = kmap_atomic(page);
- memcpy(buf + bytes_read, vaddr + off, bytes_to_read);
- kunmap_atomic(vaddr);
+ memcpy_from_page(buf + bytes_read, page, off, bytes_to_read);
pagenum++;
off = 0; /* page offset only applies to the first page */
@@ -80,8 +77,7 @@ void hfs_bnode_write(struct hfs_bnode *node, void *buf, int off, int len)
off += node->page_offset;
page = node->page[0];
- memcpy(kmap(page) + off, buf, len);
- kunmap(page);
+ memcpy_to_page(page, off, buf, len);
set_page_dirty(page);
}
@@ -105,8 +101,7 @@ void hfs_bnode_clear(struct hfs_bnode *node, int off, int len)
off += node->page_offset;
page = node->page[0];
- memset(kmap(page) + off, 0, len);
- kunmap(page);
+ memzero_page(page, off, len);
set_page_dirty(page);
}
@@ -123,9 +118,7 @@ void hfs_bnode_copy(struct hfs_bnode *dst_node, int dst,
src_page = src_node->page[0];
dst_page = dst_node->page[0];
- memcpy(kmap(dst_page) + dst, kmap(src_page) + src, len);
- kunmap(src_page);
- kunmap(dst_page);
+ memcpy_page(dst_page, dst, src_page, src, len);
set_page_dirty(dst_page);
}
@@ -140,9 +133,9 @@ void hfs_bnode_move(struct hfs_bnode *node, int dst, int src, int len)
src += node->page_offset;
dst += node->page_offset;
page = node->page[0];
- ptr = kmap(page);
+ ptr = kmap_local_page(page);
memmove(ptr + dst, ptr + src, len);
- kunmap(page);
+ kunmap_local(ptr);
set_page_dirty(page);
}
@@ -346,13 +339,14 @@ struct hfs_bnode *hfs_bnode_find(struct hfs_btree *tree, u32 num)
if (!test_bit(HFS_BNODE_NEW, &node->flags))
return node;
- desc = (struct hfs_bnode_desc *)(kmap(node->page[0]) + node->page_offset);
+ desc = (struct hfs_bnode_desc *)(kmap_local_page(node->page[0]) +
+ node->page_offset);
node->prev = be32_to_cpu(desc->prev);
node->next = be32_to_cpu(desc->next);
node->num_recs = be16_to_cpu(desc->num_recs);
node->type = desc->type;
node->height = desc->height;
- kunmap(node->page[0]);
+ kunmap_local(desc);
switch (node->type) {
case HFS_NODE_HEADER:
@@ -436,14 +430,12 @@ struct hfs_bnode *hfs_bnode_create(struct hfs_btree *tree, u32 num)
}
pagep = node->page;
- memset(kmap(*pagep) + node->page_offset, 0,
- min((int)PAGE_SIZE, (int)tree->node_size));
+ memzero_page(*pagep, node->page_offset,
+ min((int)PAGE_SIZE, (int)tree->node_size));
set_page_dirty(*pagep);
- kunmap(*pagep);
for (i = 1; i < tree->pages_per_bnode; i++) {
- memset(kmap(*++pagep), 0, PAGE_SIZE);
+ memzero_page(*++pagep, 0, PAGE_SIZE);
set_page_dirty(*pagep);
- kunmap(*pagep);
}
clear_bit(HFS_BNODE_NEW, &node->flags);
wake_up(&node->lock_wq);
diff --git a/fs/hfs/btree.c b/fs/hfs/btree.c
index 19017d2961734..2fa4b1f8cc7fb 100644
--- a/fs/hfs/btree.c
+++ b/fs/hfs/btree.c
@@ -80,7 +80,8 @@ struct hfs_btree *hfs_btree_open(struct super_block *sb, u32 id, btree_keycmp ke
goto free_inode;
/* Load the header */
- head = (struct hfs_btree_header_rec *)(kmap(page) + sizeof(struct hfs_bnode_desc));
+ head = (struct hfs_btree_header_rec *)(kmap_local_page(page) +
+ sizeof(struct hfs_bnode_desc));
tree->root = be32_to_cpu(head->root);
tree->leaf_count = be32_to_cpu(head->leaf_count);
tree->leaf_head = be32_to_cpu(head->leaf_head);
@@ -119,11 +120,12 @@ struct hfs_btree *hfs_btree_open(struct super_block *sb, u32 id, btree_keycmp ke
tree->node_size_shift = ffs(size) - 1;
tree->pages_per_bnode = (tree->node_size + PAGE_SIZE - 1) >> PAGE_SHIFT;
- kunmap(page);
+ kunmap_local(head);
put_page(page);
return tree;
fail_page:
+ kunmap_local(head);
put_page(page);
free_inode:
tree->inode->i_mapping->a_ops = &hfs_aops;
@@ -169,7 +171,8 @@ void hfs_btree_write(struct hfs_btree *tree)
return;
/* Load the header */
page = node->page[0];
- head = (struct hfs_btree_header_rec *)(kmap(page) + sizeof(struct hfs_bnode_desc));
+ head = (struct hfs_btree_header_rec *)(kmap_local_page(page) +
+ sizeof(struct hfs_bnode_desc));
head->root = cpu_to_be32(tree->root);
head->leaf_count = cpu_to_be32(tree->leaf_count);
@@ -180,7 +183,7 @@ void hfs_btree_write(struct hfs_btree *tree)
head->attributes = cpu_to_be32(tree->attributes);
head->depth = cpu_to_be16(tree->depth);
- kunmap(page);
+ kunmap_local(head);
set_page_dirty(page);
hfs_bnode_put(node);
}
@@ -268,7 +271,7 @@ struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *tree)
off += node->page_offset;
pagep = node->page + (off >> PAGE_SHIFT);
- data = kmap(*pagep);
+ data = kmap_local_page(*pagep);
off &= ~PAGE_MASK;
idx = 0;
@@ -281,7 +284,7 @@ struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *tree)
idx += i;
data[off] |= m;
set_page_dirty(*pagep);
- kunmap(*pagep);
+ kunmap_local(data);
tree->free_nodes--;
mark_inode_dirty(tree->inode);
hfs_bnode_put(node);
@@ -290,14 +293,14 @@ struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *tree)
}
}
if (++off >= PAGE_SIZE) {
- kunmap(*pagep);
- data = kmap(*++pagep);
+ kunmap_local(data);
+ data = kmap_local_page(*++pagep);
off = 0;
}
idx += 8;
len--;
}
- kunmap(*pagep);
+ kunmap_local(data);
nidx = node->next;
if (!nidx) {
printk(KERN_DEBUG "create new bmap node...\n");
@@ -313,7 +316,7 @@ struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *tree)
off = off16;
off += node->page_offset;
pagep = node->page + (off >> PAGE_SHIFT);
- data = kmap(*pagep);
+ data = kmap_local_page(*pagep);
off &= ~PAGE_MASK;
}
}
@@ -360,20 +363,20 @@ void hfs_bmap_free(struct hfs_bnode *node)
}
off += node->page_offset + nidx / 8;
page = node->page[off >> PAGE_SHIFT];
- data = kmap(page);
+ data = kmap_local_page(page);
off &= ~PAGE_MASK;
m = 1 << (~nidx & 7);
byte = data[off];
if (!(byte & m)) {
pr_crit("trying to free free bnode %u(%d)\n",
node->this, node->type);
- kunmap(page);
+ kunmap_local(data);
hfs_bnode_put(node);
return;
}
data[off] = byte & ~m;
set_page_dirty(page);
- kunmap(page);
+ kunmap_local(data);
hfs_bnode_put(node);
tree->free_nodes++;
mark_inode_dirty(tree->inode);
diff --git a/fs/hfsplus/bitmap.c b/fs/hfsplus/bitmap.c
index cebce0cfe3405..bd8dcea855880 100644
--- a/fs/hfsplus/bitmap.c
+++ b/fs/hfsplus/bitmap.c
@@ -39,7 +39,7 @@ int hfsplus_block_allocate(struct super_block *sb, u32 size,
start = size;
goto out;
}
- pptr = kmap(page);
+ pptr = kmap_local_page(page);
curr = pptr + (offset & (PAGE_CACHE_BITS - 1)) / 32;
i = offset % 32;
offset &= ~(PAGE_CACHE_BITS - 1);
@@ -74,7 +74,7 @@ int hfsplus_block_allocate(struct super_block *sb, u32 size,
}
curr++;
}
- kunmap(page);
+ kunmap_local(pptr);
offset += PAGE_CACHE_BITS;
if (offset >= size)
break;
@@ -84,7 +84,7 @@ int hfsplus_block_allocate(struct super_block *sb, u32 size,
start = size;
goto out;
}
- curr = pptr = kmap(page);
+ curr = pptr = kmap_local_page(page);
if ((size ^ offset) / PAGE_CACHE_BITS)
end = pptr + PAGE_CACHE_BITS / 32;
else
@@ -127,7 +127,7 @@ int hfsplus_block_allocate(struct super_block *sb, u32 size,
len -= 32;
}
set_page_dirty(page);
- kunmap(page);
+ kunmap_local(pptr);
offset += PAGE_CACHE_BITS;
page = read_mapping_page(mapping, offset / PAGE_CACHE_BITS,
NULL);
@@ -135,7 +135,7 @@ int hfsplus_block_allocate(struct super_block *sb, u32 size,
start = size;
goto out;
}
- pptr = kmap(page);
+ pptr = kmap_local_page(page);
curr = pptr;
end = pptr + PAGE_CACHE_BITS / 32;
}
@@ -151,7 +151,7 @@ int hfsplus_block_allocate(struct super_block *sb, u32 size,
done:
*curr = cpu_to_be32(n);
set_page_dirty(page);
- kunmap(page);
+ kunmap_local(pptr);
*max = offset + (curr - pptr) * 32 + i - start;
sbi->free_blocks -= *max;
hfsplus_mark_mdb_dirty(sb);
@@ -185,7 +185,7 @@ int hfsplus_block_free(struct super_block *sb, u32 offset, u32 count)
page = read_mapping_page(mapping, pnr, NULL);
if (IS_ERR(page))
goto kaboom;
- pptr = kmap(page);
+ pptr = kmap_local_page(page);
curr = pptr + (offset & (PAGE_CACHE_BITS - 1)) / 32;
end = pptr + PAGE_CACHE_BITS / 32;
len = count;
@@ -215,11 +215,11 @@ int hfsplus_block_free(struct super_block *sb, u32 offset, u32 count)
if (!count)
break;
set_page_dirty(page);
- kunmap(page);
+ kunmap_local(pptr);
page = read_mapping_page(mapping, ++pnr, NULL);
if (IS_ERR(page))
goto kaboom;
- pptr = kmap(page);
+ pptr = kmap_local_page(page);
curr = pptr;
end = pptr + PAGE_CACHE_BITS / 32;
}
@@ -231,7 +231,7 @@ int hfsplus_block_free(struct super_block *sb, u32 offset, u32 count)
}
out:
set_page_dirty(page);
- kunmap(page);
+ kunmap_local(pptr);
sbi->free_blocks += len;
hfsplus_mark_mdb_dirty(sb);
mutex_unlock(&sbi->alloc_mutex);
diff --git a/fs/hfsplus/bnode.c b/fs/hfsplus/bnode.c
index a5ab00e542203..87974d5e67915 100644
--- a/fs/hfsplus/bnode.c
+++ b/fs/hfsplus/bnode.c
@@ -29,14 +29,12 @@ void hfs_bnode_read(struct hfs_bnode *node, void *buf, int off, int len)
off &= ~PAGE_MASK;
l = min_t(int, len, PAGE_SIZE - off);
- memcpy(buf, kmap(*pagep) + off, l);
- kunmap(*pagep);
+ memcpy_from_page(buf, *pagep, off, l);
while ((len -= l) != 0) {
buf += l;
l = min_t(int, len, PAGE_SIZE);
- memcpy(buf, kmap(*++pagep), l);
- kunmap(*pagep);
+ memcpy_from_page(buf, *++pagep, 0, l);
}
}
@@ -82,16 +80,14 @@ void hfs_bnode_write(struct hfs_bnode *node, void *buf, int off, int len)
off &= ~PAGE_MASK;
l = min_t(int, len, PAGE_SIZE - off);
- memcpy(kmap(*pagep) + off, buf, l);
+ memcpy_to_page(*pagep, off, buf, l);
set_page_dirty(*pagep);
- kunmap(*pagep);
while ((len -= l) != 0) {
buf += l;
l = min_t(int, len, PAGE_SIZE);
- memcpy(kmap(*++pagep), buf, l);
+ memcpy_to_page(*++pagep, 0, buf, l);
set_page_dirty(*pagep);
- kunmap(*pagep);
}
}
@@ -112,15 +108,13 @@ void hfs_bnode_clear(struct hfs_bnode *node, int off, int len)
off &= ~PAGE_MASK;
l = min_t(int, len, PAGE_SIZE - off);
- memset(kmap(*pagep) + off, 0, l);
+ memzero_page(*pagep, off, l);
set_page_dirty(*pagep);
- kunmap(*pagep);
while ((len -= l) != 0) {
l = min_t(int, len, PAGE_SIZE);
- memset(kmap(*++pagep), 0, l);
+ memzero_page(*++pagep, 0, l);
set_page_dirty(*pagep);
- kunmap(*pagep);
}
}
@@ -142,24 +136,20 @@ void hfs_bnode_copy(struct hfs_bnode *dst_node, int dst,
if (src == dst) {
l = min_t(int, len, PAGE_SIZE - src);
- memcpy(kmap(*dst_page) + src, kmap(*src_page) + src, l);
- kunmap(*src_page);
+ memcpy_page(*dst_page, src, *src_page, src, l);
set_page_dirty(*dst_page);
- kunmap(*dst_page);
while ((len -= l) != 0) {
l = min_t(int, len, PAGE_SIZE);
- memcpy(kmap(*++dst_page), kmap(*++src_page), l);
- kunmap(*src_page);
+ memcpy_page(*++dst_page, 0, *++src_page, 0, l);
set_page_dirty(*dst_page);
- kunmap(*dst_page);
}
} else {
void *src_ptr, *dst_ptr;
do {
- src_ptr = kmap(*src_page) + src;
- dst_ptr = kmap(*dst_page) + dst;
+ dst_ptr = kmap_local_page(*dst_page) + dst;
+ src_ptr = kmap_local_page(*src_page) + src;
if (PAGE_SIZE - src < PAGE_SIZE - dst) {
l = PAGE_SIZE - src;
src = 0;
@@ -171,9 +161,9 @@ void hfs_bnode_copy(struct hfs_bnode *dst_node, int dst,
}
l = min(len, l);
memcpy(dst_ptr, src_ptr, l);
- kunmap(*src_page);
+ kunmap_local(src_ptr);
set_page_dirty(*dst_page);
- kunmap(*dst_page);
+ kunmap_local(dst_ptr);
if (!dst)
dst_page++;
else
@@ -185,6 +175,7 @@ void hfs_bnode_copy(struct hfs_bnode *dst_node, int dst,
void hfs_bnode_move(struct hfs_bnode *node, int dst, int src, int len)
{
struct page **src_page, **dst_page;
+ void *src_ptr, *dst_ptr;
int l;
hfs_dbg(BNODE_MOD, "movebytes: %u,%u,%u\n", dst, src, len);
@@ -202,27 +193,28 @@ void hfs_bnode_move(struct hfs_bnode *node, int dst, int src, int len)
if (src == dst) {
while (src < len) {
- memmove(kmap(*dst_page), kmap(*src_page), src);
- kunmap(*src_page);
+ dst_ptr = kmap_local_page(*dst_page);
+ src_ptr = kmap_local_page(*src_page);
+ memmove(dst_ptr, src_ptr, src);
+ kunmap_local(src_ptr);
set_page_dirty(*dst_page);
- kunmap(*dst_page);
+ kunmap_local(dst_ptr);
len -= src;
src = PAGE_SIZE;
src_page--;
dst_page--;
}
src -= len;
- memmove(kmap(*dst_page) + src,
- kmap(*src_page) + src, len);
- kunmap(*src_page);
+ dst_ptr = kmap_local_page(*dst_page);
+ src_ptr = kmap_local_page(*src_page);
+ memmove(dst_ptr + src, src_ptr + src, len);
+ kunmap_local(src_ptr);
set_page_dirty(*dst_page);
- kunmap(*dst_page);
+ kunmap_local(dst_ptr);
} else {
- void *src_ptr, *dst_ptr;
-
do {
- src_ptr = kmap(*src_page) + src;
- dst_ptr = kmap(*dst_page) + dst;
+ dst_ptr = kmap_local_page(*dst_page) + dst;
+ src_ptr = kmap_local_page(*src_page) + src;
if (src < dst) {
l = src;
src = PAGE_SIZE;
@@ -234,9 +226,9 @@ void hfs_bnode_move(struct hfs_bnode *node, int dst, int src, int len)
}
l = min(len, l);
memmove(dst_ptr - l, src_ptr - l, l);
- kunmap(*src_page);
+ kunmap_local(src_ptr);
set_page_dirty(*dst_page);
- kunmap(*dst_page);
+ kunmap_local(dst_ptr);
if (dst == PAGE_SIZE)
dst_page--;
else
@@ -251,26 +243,27 @@ void hfs_bnode_move(struct hfs_bnode *node, int dst, int src, int len)
if (src == dst) {
l = min_t(int, len, PAGE_SIZE - src);
- memmove(kmap(*dst_page) + src,
- kmap(*src_page) + src, l);
- kunmap(*src_page);
+
+ dst_ptr = kmap_local_page(*dst_page) + src;
+ src_ptr = kmap_local_page(*src_page) + src;
+ memmove(dst_ptr, src_ptr, l);
+ kunmap_local(src_ptr);
set_page_dirty(*dst_page);
- kunmap(*dst_page);
+ kunmap_local(dst_ptr);
while ((len -= l) != 0) {
l = min_t(int, len, PAGE_SIZE);
- memmove(kmap(*++dst_page),
- kmap(*++src_page), l);
- kunmap(*src_page);
+ dst_ptr = kmap_local_page(*++dst_page);
+ src_ptr = kmap_local_page(*++src_page);
+ memmove(dst_ptr, src_ptr, l);
+ kunmap_local(src_ptr);
set_page_dirty(*dst_page);
- kunmap(*dst_page);
+ kunmap_local(dst_ptr);
}
} else {
- void *src_ptr, *dst_ptr;
-
do {
- src_ptr = kmap(*src_page) + src;
- dst_ptr = kmap(*dst_page) + dst;
+ dst_ptr = kmap_local_page(*dst_page) + dst;
+ src_ptr = kmap_local_page(*src_page) + src;
if (PAGE_SIZE - src <
PAGE_SIZE - dst) {
l = PAGE_SIZE - src;
@@ -283,9 +276,9 @@ void hfs_bnode_move(struct hfs_bnode *node, int dst, int src, int len)
}
l = min(len, l);
memmove(dst_ptr, src_ptr, l);
- kunmap(*src_page);
+ kunmap_local(src_ptr);
set_page_dirty(*dst_page);
- kunmap(*dst_page);
+ kunmap_local(dst_ptr);
if (!dst)
dst_page++;
else
@@ -498,14 +491,14 @@ struct hfs_bnode *hfs_bnode_find(struct hfs_btree *tree, u32 num)
if (!test_bit(HFS_BNODE_NEW, &node->flags))
return node;
- desc = (struct hfs_bnode_desc *)(kmap(node->page[0]) +
- node->page_offset);
+ desc = (struct hfs_bnode_desc *)(kmap_local_page(node->page[0]) +
+ node->page_offset);
node->prev = be32_to_cpu(desc->prev);
node->next = be32_to_cpu(desc->next);
node->num_recs = be16_to_cpu(desc->num_recs);
node->type = desc->type;
node->height = desc->height;
- kunmap(node->page[0]);
+ kunmap_local(desc);
switch (node->type) {
case HFS_NODE_HEADER:
@@ -589,14 +582,12 @@ struct hfs_bnode *hfs_bnode_create(struct hfs_btree *tree, u32 num)
}
pagep = node->page;
- memset(kmap(*pagep) + node->page_offset, 0,
- min_t(int, PAGE_SIZE, tree->node_size));
+ memzero_page(*pagep, node->page_offset,
+ min_t(int, PAGE_SIZE, tree->node_size));
set_page_dirty(*pagep);
- kunmap(*pagep);
for (i = 1; i < tree->pages_per_bnode; i++) {
- memset(kmap(*++pagep), 0, PAGE_SIZE);
+ memzero_page(*++pagep, 0, PAGE_SIZE);
set_page_dirty(*pagep);
- kunmap(*pagep);
}
clear_bit(HFS_BNODE_NEW, &node->flags);
wake_up(&node->lock_wq);
diff --git a/fs/hfsplus/btree.c b/fs/hfsplus/btree.c
index 66774f4cb4fd5..9e1732a2b92a8 100644
--- a/fs/hfsplus/btree.c
+++ b/fs/hfsplus/btree.c
@@ -163,7 +163,7 @@ struct hfs_btree *hfs_btree_open(struct super_block *sb, u32 id)
goto free_inode;
/* Load the header */
- head = (struct hfs_btree_header_rec *)(kmap(page) +
+ head = (struct hfs_btree_header_rec *)(kmap_local_page(page) +
sizeof(struct hfs_bnode_desc));
tree->root = be32_to_cpu(head->root);
tree->leaf_count = be32_to_cpu(head->leaf_count);
@@ -240,11 +240,12 @@ struct hfs_btree *hfs_btree_open(struct super_block *sb, u32 id)
(tree->node_size + PAGE_SIZE - 1) >>
PAGE_SHIFT;
- kunmap(page);
+ kunmap_local(head);
put_page(page);
return tree;
fail_page:
+ kunmap_local(head);
put_page(page);
free_inode:
tree->inode->i_mapping->a_ops = &hfsplus_aops;
@@ -291,7 +292,7 @@ int hfs_btree_write(struct hfs_btree *tree)
return -EIO;
/* Load the header */
page = node->page[0];
- head = (struct hfs_btree_header_rec *)(kmap(page) +
+ head = (struct hfs_btree_header_rec *)(kmap_local_page(page) +
sizeof(struct hfs_bnode_desc));
head->root = cpu_to_be32(tree->root);
@@ -303,7 +304,7 @@ int hfs_btree_write(struct hfs_btree *tree)
head->attributes = cpu_to_be32(tree->attributes);
head->depth = cpu_to_be16(tree->depth);
- kunmap(page);
+ kunmap_local(head);
set_page_dirty(page);
hfs_bnode_put(node);
return 0;
@@ -394,7 +395,7 @@ struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *tree)
off += node->page_offset;
pagep = node->page + (off >> PAGE_SHIFT);
- data = kmap(*pagep);
+ data = kmap_local_page(*pagep);
off &= ~PAGE_MASK;
idx = 0;
@@ -407,7 +408,7 @@ struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *tree)
idx += i;
data[off] |= m;
set_page_dirty(*pagep);
- kunmap(*pagep);
+ kunmap_local(data);
tree->free_nodes--;
mark_inode_dirty(tree->inode);
hfs_bnode_put(node);
@@ -417,14 +418,14 @@ struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *tree)
}
}
if (++off >= PAGE_SIZE) {
- kunmap(*pagep);
- data = kmap(*++pagep);
+ kunmap_local(data);
+ data = kmap_local_page(*++pagep);
off = 0;
}
idx += 8;
len--;
}
- kunmap(*pagep);
+ kunmap_local(data);
nidx = node->next;
if (!nidx) {
hfs_dbg(BNODE_MOD, "create new bmap node\n");
@@ -440,7 +441,7 @@ struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *tree)
off = off16;
off += node->page_offset;
pagep = node->page + (off >> PAGE_SHIFT);
- data = kmap(*pagep);
+ data = kmap_local_page(*pagep);
off &= ~PAGE_MASK;
}
}
@@ -490,7 +491,7 @@ void hfs_bmap_free(struct hfs_bnode *node)
}
off += node->page_offset + nidx / 8;
page = node->page[off >> PAGE_SHIFT];
- data = kmap(page);
+ data = kmap_local_page(page);
off &= ~PAGE_MASK;
m = 1 << (~nidx & 7);
byte = data[off];
@@ -498,13 +499,13 @@ void hfs_bmap_free(struct hfs_bnode *node)
pr_crit("trying to free free bnode "
"%u(%d)\n",
node->this, node->type);
- kunmap(page);
+ kunmap_local(data);
hfs_bnode_put(node);
return;
}
data[off] = byte & ~m;
set_page_dirty(page);
- kunmap(page);
+ kunmap_local(data);
hfs_bnode_put(node);
tree->free_nodes++;
mark_inode_dirty(tree->inode);
diff --git a/fs/isofs/compress.c b/fs/isofs/compress.c
index 59b03d74ecbec..c4da3f634b92e 100644
--- a/fs/isofs/compress.c
+++ b/fs/isofs/compress.c
@@ -67,8 +67,7 @@ static loff_t zisofs_uncompress_block(struct inode *inode, loff_t block_start,
for ( i = 0 ; i < pcount ; i++ ) {
if (!pages[i])
continue;
- memset(page_address(pages[i]), 0, PAGE_SIZE);
- flush_dcache_page(pages[i]);
+ memzero_page(pages[i], 0, PAGE_SIZE);
SetPageUptodate(pages[i]);
}
return ((loff_t)pcount) << PAGE_SHIFT;
@@ -120,7 +119,7 @@ static loff_t zisofs_uncompress_block(struct inode *inode, loff_t block_start,
zerr != Z_STREAM_END) {
if (!stream.avail_out) {
if (pages[curpage]) {
- stream.next_out = page_address(pages[curpage])
+ stream.next_out = kmap_local_page(pages[curpage])
+ poffset;
stream.avail_out = PAGE_SIZE - poffset;
poffset = 0;
@@ -176,6 +175,10 @@ static loff_t zisofs_uncompress_block(struct inode *inode, loff_t block_start,
flush_dcache_page(pages[curpage]);
SetPageUptodate(pages[curpage]);
}
+ if (stream.next_out != (unsigned char *)zisofs_sink_page) {
+ kunmap_local(stream.next_out);
+ stream.next_out = NULL;
+ }
curpage++;
}
if (!stream.avail_in)
@@ -183,6 +186,8 @@ static loff_t zisofs_uncompress_block(struct inode *inode, loff_t block_start,
}
inflate_out:
zlib_inflateEnd(&stream);
+ if (stream.next_out && stream.next_out != (unsigned char *)zisofs_sink_page)
+ kunmap_local(stream.next_out);
z_eio:
mutex_unlock(&zisofs_zlib_lock);
@@ -283,9 +288,7 @@ static int zisofs_fill_pages(struct inode *inode, int full_page, int pcount,
}
if (poffset && *pages) {
- memset(page_address(*pages) + poffset, 0,
- PAGE_SIZE - poffset);
- flush_dcache_page(*pages);
+ memzero_page(*pages, poffset, PAGE_SIZE - poffset);
SetPageUptodate(*pages);
}
return 0;
@@ -343,10 +346,8 @@ static int zisofs_read_folio(struct file *file, struct folio *folio)
for (i = 0; i < pcount; i++, index++) {
if (i != full_page)
pages[i] = grab_cache_page_nowait(mapping, index);
- if (pages[i]) {
+ if (pages[i])
ClearPageError(pages[i]);
- kmap(pages[i]);
- }
}
err = zisofs_fill_pages(inode, full_page, pcount, pages);
@@ -357,7 +358,6 @@ static int zisofs_read_folio(struct file *file, struct folio *folio)
flush_dcache_page(pages[i]);
if (i == full_page && err)
SetPageError(pages[i]);
- kunmap(pages[i]);
unlock_page(pages[i]);
if (i != full_page)
put_page(pages[i]);
diff --git a/fs/ntfs/attrib.c b/fs/ntfs/attrib.c
index 52615e6090e1c..a3865bc4a0c65 100644
--- a/fs/ntfs/attrib.c
+++ b/fs/ntfs/attrib.c
@@ -594,17 +594,37 @@ static int ntfs_attr_find(const ATTR_TYPE type, const ntfschar *name,
for (;; a = (ATTR_RECORD*)((u8*)a + le32_to_cpu(a->length))) {
u8 *mrec_end = (u8 *)ctx->mrec +
le32_to_cpu(ctx->mrec->bytes_allocated);
- u8 *name_end = (u8 *)a + le16_to_cpu(a->name_offset) +
- a->name_length * sizeof(ntfschar);
- if ((u8*)a < (u8*)ctx->mrec || (u8*)a > mrec_end ||
- name_end > mrec_end)
+ u8 *name_end;
+
+ /* check whether ATTR_RECORD wrap */
+ if ((u8 *)a < (u8 *)ctx->mrec)
+ break;
+
+ /* check whether Attribute Record Header is within bounds */
+ if ((u8 *)a > mrec_end ||
+ (u8 *)a + sizeof(ATTR_RECORD) > mrec_end)
+ break;
+
+ /* check whether ATTR_RECORD's name is within bounds */
+ name_end = (u8 *)a + le16_to_cpu(a->name_offset) +
+ a->name_length * sizeof(ntfschar);
+ if (name_end > mrec_end)
break;
+
ctx->attr = a;
if (unlikely(le32_to_cpu(a->type) > le32_to_cpu(type) ||
a->type == AT_END))
return -ENOENT;
if (unlikely(!a->length))
break;
+
+ /* check whether ATTR_RECORD's length wrap */
+ if ((u8 *)a + le32_to_cpu(a->length) < (u8 *)a)
+ break;
+ /* check whether ATTR_RECORD's length is within bounds */
+ if ((u8 *)a + le32_to_cpu(a->length) > mrec_end)
+ break;
+
if (a->type != type)
continue;
/*
diff --git a/fs/ntfs/inode.c b/fs/ntfs/inode.c
index db0f1995aedd1..08c659332e26b 100644
--- a/fs/ntfs/inode.c
+++ b/fs/ntfs/inode.c
@@ -1829,6 +1829,13 @@ int ntfs_read_inode_mount(struct inode *vi)
goto err_out;
}
+ /* Sanity check offset to the first attribute */
+ if (le16_to_cpu(m->attrs_offset) >= le32_to_cpu(m->bytes_allocated)) {
+ ntfs_error(sb, "Incorrect mft offset to the first attribute %u in superblock.",
+ le16_to_cpu(m->attrs_offset));
+ goto err_out;
+ }
+
/* Need this to sanity check attribute list references to $MFT. */
vi->i_generation = ni->seq_no = le16_to_cpu(m->sequence_number);
diff --git a/fs/ocfs2/stackglue.c b/fs/ocfs2/stackglue.c
index dd77b7aaabf5c..317126261523b 100644
--- a/fs/ocfs2/stackglue.c
+++ b/fs/ocfs2/stackglue.c
@@ -334,10 +334,10 @@ int ocfs2_cluster_connect(const char *stack_name,
goto out;
}
- strlcpy(new_conn->cc_name, group, GROUP_NAME_MAX + 1);
+ strscpy(new_conn->cc_name, group, GROUP_NAME_MAX + 1);
new_conn->cc_namelen = grouplen;
if (cluster_name_len)
- strlcpy(new_conn->cc_cluster_name, cluster_name,
+ strscpy(new_conn->cc_cluster_name, cluster_name,
CLUSTER_NAME_MAX + 1);
new_conn->cc_cluster_name_len = cluster_name_len;
new_conn->cc_recovery_handler = recovery_handler;
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index 26b4c2bfee497..42c993e53924f 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -2219,7 +2219,7 @@ static int ocfs2_initialize_super(struct super_block *sb,
goto out_journal;
}
- strlcpy(osb->vol_label, di->id2.i_super.s_label,
+ strscpy(osb->vol_label, di->id2.i_super.s_label,
OCFS2_MAX_VOL_LABEL_LEN);
osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
diff --git a/fs/qnx6/inode.c b/fs/qnx6/inode.c
index b9895afca9d11..85b2fa3b211c9 100644
--- a/fs/qnx6/inode.c
+++ b/fs/qnx6/inode.c
@@ -470,10 +470,8 @@ static int qnx6_fill_super(struct super_block *s, void *data, int silent)
out1:
iput(sbi->inodes);
out:
- if (bh1)
- brelse(bh1);
- if (bh2)
- brelse(bh2);
+ brelse(bh1);
+ brelse(bh2);
outnobh:
kfree(qs);
s->s_fs_info = NULL;
diff --git a/fs/reiserfs/procfs.c b/fs/reiserfs/procfs.c
index 4a7cb16e9345c..3dba8acf4e832 100644
--- a/fs/reiserfs/procfs.c
+++ b/fs/reiserfs/procfs.c
@@ -411,7 +411,7 @@ int reiserfs_proc_info_init(struct super_block *sb)
char *s;
/* Some block devices use /'s */
- strlcpy(b, sb->s_id, BDEVNAME_SIZE);
+ strscpy(b, sb->s_id, BDEVNAME_SIZE);
s = strchr(b, '/');
if (s)
*s = '!';
@@ -441,7 +441,7 @@ int reiserfs_proc_info_done(struct super_block *sb)
char *s;
/* Some block devices use /'s */
- strlcpy(b, sb->s_id, BDEVNAME_SIZE);
+ strscpy(b, sb->s_id, BDEVNAME_SIZE);
s = strchr(b, '/');
if (s)
*s = '!';
diff --git a/include/asm-generic/unaligned.h b/include/asm-generic/unaligned.h
index df30f11b4a460..699650f819706 100644
--- a/include/asm-generic/unaligned.h
+++ b/include/asm-generic/unaligned.h
@@ -126,7 +126,7 @@ static inline void put_unaligned_le24(const u32 val, void *p)
__put_unaligned_le24(val, p);
}
-static inline void __put_unaligned_be48(const u64 val, __u8 *p)
+static inline void __put_unaligned_be48(const u64 val, u8 *p)
{
*p++ = val >> 40;
*p++ = val >> 32;
diff --git a/include/linux/bitops.h b/include/linux/bitops.h
index 3b89c64bcfd8f..fb24a513d9172 100644
--- a/include/linux/bitops.h
+++ b/include/linux/bitops.h
@@ -328,10 +328,10 @@ static __always_inline void __assign_bit(long nr, volatile unsigned long *addr,
const typeof(*(ptr)) mask__ = (mask), bits__ = (bits); \
typeof(*(ptr)) old__, new__; \
\
+ old__ = READ_ONCE(*(ptr)); \
do { \
- old__ = READ_ONCE(*(ptr)); \
new__ = (old__ & ~mask__) | bits__; \
- } while (cmpxchg(ptr, old__, new__) != old__); \
+ } while (!try_cmpxchg(ptr, &old__, new__)); \
\
old__; \
})
@@ -343,11 +343,12 @@ static __always_inline void __assign_bit(long nr, volatile unsigned long *addr,
const typeof(*(ptr)) clear__ = (clear), test__ = (test);\
typeof(*(ptr)) old__, new__; \
\
+ old__ = READ_ONCE(*(ptr)); \
do { \
- old__ = READ_ONCE(*(ptr)); \
+ if (old__ & test__) \
+ break; \
new__ = old__ & ~clear__; \
- } while (!(old__ & test__) && \
- cmpxchg(ptr, old__, new__) != old__); \
+ } while (!try_cmpxchg(ptr, &old__, new__)); \
\
!(old__ & test__); \
})
diff --git a/include/linux/iversion.h b/include/linux/iversion.h
index 3bfebde5a1a6d..eb5a158101693 100644
--- a/include/linux/iversion.h
+++ b/include/linux/iversion.h
@@ -123,17 +123,12 @@ inode_peek_iversion_raw(const struct inode *inode)
static inline void
inode_set_max_iversion_raw(struct inode *inode, u64 val)
{
- u64 cur, old;
+ u64 cur = inode_peek_iversion_raw(inode);
- cur = inode_peek_iversion_raw(inode);
- for (;;) {
+ do {
if (cur > val)
break;
- old = atomic64_cmpxchg(&inode->i_version, cur, val);
- if (likely(old == cur))
- break;
- cur = old;
- }
+ } while (!atomic64_try_cmpxchg(&inode->i_version, &cur, val));
}
/**
@@ -197,7 +192,7 @@ inode_set_iversion_queried(struct inode *inode, u64 val)
static inline bool
inode_maybe_inc_iversion(struct inode *inode, bool force)
{
- u64 cur, old, new;
+ u64 cur, new;
/*
* The i_version field is not strictly ordered with any other inode
@@ -211,19 +206,14 @@ inode_maybe_inc_iversion(struct inode *inode, bool force)
*/
smp_mb();
cur = inode_peek_iversion_raw(inode);
- for (;;) {
+ do {
/* If flag is clear then we needn't do anything */
if (!force && !(cur & I_VERSION_QUERIED))
return false;
/* Since lowest bit is flag, add 2 to avoid it */
new = (cur & ~I_VERSION_QUERIED) + I_VERSION_INCREMENT;
-
- old = atomic64_cmpxchg(&inode->i_version, cur, new);
- if (likely(old == cur))
- break;
- cur = old;
- }
+ } while (!atomic64_try_cmpxchg(&inode->i_version, &cur, new));
return true;
}
@@ -304,10 +294,10 @@ inode_peek_iversion(const struct inode *inode)
static inline u64
inode_query_iversion(struct inode *inode)
{
- u64 cur, old, new;
+ u64 cur, new;
cur = inode_peek_iversion_raw(inode);
- for (;;) {
+ do {
/* If flag is already set, then no need to swap */
if (cur & I_VERSION_QUERIED) {
/*
@@ -320,11 +310,7 @@ inode_query_iversion(struct inode *inode)
}
new = cur | I_VERSION_QUERIED;
- old = atomic64_cmpxchg(&inode->i_version, cur, new);
- if (likely(old == cur))
- break;
- cur = old;
- }
+ } while (!atomic64_try_cmpxchg(&inode->i_version, &cur, new));
return cur >> I_VERSION_QUERIED_SHIFT;
}
diff --git a/include/linux/kexec.h b/include/linux/kexec.h
index 13e6c4b58f07d..41a686996aaa3 100644
--- a/include/linux/kexec.h
+++ b/include/linux/kexec.h
@@ -427,7 +427,7 @@ extern int kexec_load_disabled;
extern bool kexec_in_progress;
int crash_shrink_memory(unsigned long new_size);
-size_t crash_get_memory_size(void);
+ssize_t crash_get_memory_size(void);
#ifndef arch_kexec_protect_crashkres
/*
diff --git a/include/linux/sched/task.h b/include/linux/sched/task.h
index 81cab4b01edcb..d6c48163c6def 100644
--- a/include/linux/sched/task.h
+++ b/include/linux/sched/task.h
@@ -127,6 +127,9 @@ static inline void put_task_struct_many(struct task_struct *t, int nr)
void put_task_struct_rcu_user(struct task_struct *task);
+/* Free all architecture-specific resources held by a thread. */
+void release_thread(struct task_struct *dead_task);
+
#ifdef CONFIG_ARCH_WANTS_DYNAMIC_TASK_STRUCT
extern int arch_task_struct_size __read_mostly;
#else
diff --git a/init/do_mounts.c b/init/do_mounts.c
index 7058e14ad5f70..811e94daf0a84 100644
--- a/init/do_mounts.c
+++ b/init/do_mounts.c
@@ -296,7 +296,7 @@ EXPORT_SYMBOL_GPL(name_to_dev_t);
static int __init root_dev_setup(char *line)
{
- strlcpy(saved_root_name, line, sizeof(saved_root_name));
+ strscpy(saved_root_name, line, sizeof(saved_root_name));
return 1;
}
@@ -343,7 +343,7 @@ static int __init split_fs_names(char *page, size_t size, char *names)
int count = 1;
char *p = page;
- strlcpy(p, root_fs_names, size);
+ strscpy(p, root_fs_names, size);
while (*p++) {
if (p[-1] == ',') {
p[-1] = '\0';
diff --git a/init/initramfs.c b/init/initramfs.c
index 18229cfe8906b..2f5bfb7d76521 100644
--- a/init/initramfs.c
+++ b/init/initramfs.c
@@ -482,7 +482,7 @@ static long __init flush_buffer(void *bufv, unsigned long len)
return origLen;
}
-static unsigned long my_inptr; /* index of next byte to be processed in inbuf */
+static unsigned long my_inptr __initdata; /* index of next byte to be processed in inbuf */
#include <linux/decompress/generic.h>
diff --git a/init/main.c b/init/main.c
index 2a475d40f952d..9b3c8867f96bf 100644
--- a/init/main.c
+++ b/init/main.c
@@ -422,7 +422,7 @@ static void __init setup_boot_config(void)
if (!data)
data = xbc_get_embedded_bootconfig(&size);
- strlcpy(tmp_cmdline, boot_command_line, COMMAND_LINE_SIZE);
+ strscpy(tmp_cmdline, boot_command_line, COMMAND_LINE_SIZE);
err = parse_args("bootconfig", tmp_cmdline, NULL, 0, 0, 0, NULL,
bootconfig_params);
@@ -762,7 +762,7 @@ void __init parse_early_param(void)
return;
/* All fall through to do_early_param. */
- strlcpy(tmp_cmdline, boot_command_line, COMMAND_LINE_SIZE);
+ strscpy(tmp_cmdline, boot_command_line, COMMAND_LINE_SIZE);
parse_early_options(tmp_cmdline);
done = 1;
}
diff --git a/ipc/util.c b/ipc/util.c
index a2208d0f26b2d..05cb9de667350 100644
--- a/ipc/util.c
+++ b/ipc/util.c
@@ -782,28 +782,37 @@ struct pid_namespace *ipc_seq_pid_ns(struct seq_file *s)
return iter->pid_ns;
}
-/*
- * This routine locks the ipc structure found at least at position pos.
+/**
+ * sysvipc_find_ipc - Find and lock the ipc structure based on seq pos
+ * @ids: ipc identifier set
+ * @pos: expected position
+ *
+ * The function finds an ipc structure, based on the sequence file
+ * position @pos. If there is no ipc structure at position @pos, then
+ * the successor is selected.
+ * If a structure is found, then it is locked (both rcu_read_lock() and
+ * ipc_lock_object()) and @pos is set to the position needed to locate
+ * the found ipc structure.
+ * If nothing is found (i.e. EOF), @pos is not modified.
+ *
+ * The function returns the found ipc structure, or NULL at EOF.
*/
-static struct kern_ipc_perm *sysvipc_find_ipc(struct ipc_ids *ids, loff_t pos,
- loff_t *new_pos)
+static struct kern_ipc_perm *sysvipc_find_ipc(struct ipc_ids *ids, loff_t *pos)
{
- struct kern_ipc_perm *ipc = NULL;
- int max_idx = ipc_get_maxidx(ids);
+ int tmpidx;
+ struct kern_ipc_perm *ipc;
- if (max_idx == -1 || pos > max_idx)
- goto out;
+ /* convert from position to idr index -> "-1" */
+ tmpidx = *pos - 1;
- for (; pos <= max_idx; pos++) {
- ipc = idr_find(&ids->ipcs_idr, pos);
- if (ipc != NULL) {
- rcu_read_lock();
- ipc_lock_object(ipc);
- break;
- }
+ ipc = idr_get_next(&ids->ipcs_idr, &tmpidx);
+ if (ipc != NULL) {
+ rcu_read_lock();
+ ipc_lock_object(ipc);
+
+ /* convert from idr index to position -> "+1" */
+ *pos = tmpidx + 1;
}
-out:
- *new_pos = pos + 1;
return ipc;
}
@@ -817,11 +826,13 @@ static void *sysvipc_proc_next(struct seq_file *s, void *it, loff_t *pos)
if (ipc && ipc != SEQ_START_TOKEN)
ipc_unlock(ipc);
- return sysvipc_find_ipc(&iter->ns->ids[iface->ids], *pos, pos);
+ /* Next -> search for *pos+1 */
+ (*pos)++;
+ return sysvipc_find_ipc(&iter->ns->ids[iface->ids], pos);
}
/*
- * File positions: pos 0 -> header, pos n -> ipc id = n - 1.
+ * File positions: pos 0 -> header, pos n -> ipc idx = n - 1.
* SeqFile iterator: iterator value locked ipc pointer or SEQ_TOKEN_START.
*/
static void *sysvipc_proc_start(struct seq_file *s, loff_t *pos)
@@ -846,8 +857,8 @@ static void *sysvipc_proc_start(struct seq_file *s, loff_t *pos)
if (*pos == 0)
return SEQ_START_TOKEN;
- /* Find the (pos-1)th ipc */
- return sysvipc_find_ipc(ids, *pos - 1, pos);
+ /* Otherwise return the correct ipc structure */
+ return sysvipc_find_ipc(ids, pos);
}
static void sysvipc_proc_stop(struct seq_file *s, void *it)
diff --git a/kernel/exit.c b/kernel/exit.c
index 4b8e7c94a3c04..0ee19ba2ee30d 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -183,6 +183,10 @@ void put_task_struct_rcu_user(struct task_struct *task)
call_rcu(&task->rcu, delayed_put_task_struct);
}
+void __weak release_thread(struct task_struct *dead_task)
+{
+}
+
void release_task(struct task_struct *p)
{
struct task_struct *leader;
diff --git a/kernel/fail_function.c b/kernel/fail_function.c
index 60dc825ecc2b3..a7ccd2930c5f4 100644
--- a/kernel/fail_function.c
+++ b/kernel/fail_function.c
@@ -247,15 +247,11 @@ static ssize_t fei_write(struct file *file, const char __user *buffer,
/* cut off if it is too long */
if (count > KSYM_NAME_LEN)
count = KSYM_NAME_LEN;
- buf = kmalloc(count + 1, GFP_KERNEL);
- if (!buf)
- return -ENOMEM;
- if (copy_from_user(buf, buffer, count)) {
- ret = -EFAULT;
- goto out_free;
- }
- buf[count] = '\0';
+ buf = memdup_user_nul(buffer, count);
+ if (IS_ERR(buf))
+ return PTR_ERR(buf);
+
sym = strstrip(buf);
mutex_lock(&fei_lock);
@@ -298,17 +294,15 @@ static ssize_t fei_write(struct file *file, const char __user *buffer,
}
ret = register_kprobe(&attr->kp);
- if (!ret)
- fei_debugfs_add_attr(attr);
- if (ret < 0)
- fei_attr_remove(attr);
- else {
- list_add_tail(&attr->list, &fei_attr_list);
- ret = count;
+ if (ret) {
+ fei_attr_free(attr);
+ goto out;
}
+ fei_debugfs_add_attr(attr);
+ list_add_tail(&attr->list, &fei_attr_list);
+ ret = count;
out:
mutex_unlock(&fei_lock);
-out_free:
kfree(buf);
return ret;
}
diff --git a/kernel/kexec.c b/kernel/kexec.c
index b5e40f0697681..cb8e6e6f983c7 100644
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -93,13 +93,10 @@ static int do_kexec_load(unsigned long entry, unsigned long nr_segments,
/*
* Because we write directly to the reserved memory region when loading
- * crash kernels we need a mutex here to prevent multiple crash kernels
- * from attempting to load simultaneously, and to prevent a crash kernel
- * from loading over the top of a in use crash kernel.
- *
- * KISS: always take the mutex.
+ * crash kernels we need a serialization here to prevent multiple crash
+ * kernels from attempting to load simultaneously.
*/
- if (!mutex_trylock(&kexec_mutex))
+ if (!kexec_trylock())
return -EBUSY;
if (flags & KEXEC_ON_CRASH) {
@@ -165,7 +162,7 @@ static int do_kexec_load(unsigned long entry, unsigned long nr_segments,
kimage_free(image);
out_unlock:
- mutex_unlock(&kexec_mutex);
+ kexec_unlock();
return ret;
}
diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c
index acd029b307e42..ca2743f9c634e 100644
--- a/kernel/kexec_core.c
+++ b/kernel/kexec_core.c
@@ -46,7 +46,7 @@
#include <crypto/hash.h>
#include "kexec_internal.h"
-DEFINE_MUTEX(kexec_mutex);
+atomic_t __kexec_lock = ATOMIC_INIT(0);
/* Per cpu memory for storing cpu states in case of system crash. */
note_buf_t __percpu *crash_notes;
@@ -809,7 +809,7 @@ static int kimage_load_normal_segment(struct kimage *image,
if (result < 0)
goto out;
- ptr = kmap(page);
+ ptr = kmap_local_page(page);
/* Start with a clear page */
clear_page(ptr);
ptr += maddr & ~PAGE_MASK;
@@ -822,7 +822,7 @@ static int kimage_load_normal_segment(struct kimage *image,
memcpy(ptr, kbuf, uchunk);
else
result = copy_from_user(ptr, buf, uchunk);
- kunmap(page);
+ kunmap_local(ptr);
if (result) {
result = -EFAULT;
goto out;
@@ -873,7 +873,7 @@ static int kimage_load_crash_segment(struct kimage *image,
goto out;
}
arch_kexec_post_alloc_pages(page_address(page), 1, 0);
- ptr = kmap(page);
+ ptr = kmap_local_page(page);
ptr += maddr & ~PAGE_MASK;
mchunk = min_t(size_t, mbytes,
PAGE_SIZE - (maddr & ~PAGE_MASK));
@@ -889,7 +889,7 @@ static int kimage_load_crash_segment(struct kimage *image,
else
result = copy_from_user(ptr, buf, uchunk);
kexec_flush_icache_page(page);
- kunmap(page);
+ kunmap_local(ptr);
arch_kexec_pre_free_pages(page_address(page), 1);
if (result) {
result = -EFAULT;
@@ -959,7 +959,7 @@ late_initcall(kexec_core_sysctl_init);
*/
void __noclone __crash_kexec(struct pt_regs *regs)
{
- /* Take the kexec_mutex here to prevent sys_kexec_load
+ /* Take the kexec_lock here to prevent sys_kexec_load
* running on one cpu from replacing the crash kernel
* we are using after a panic on a different cpu.
*
@@ -967,7 +967,7 @@ void __noclone __crash_kexec(struct pt_regs *regs)
* of memory the xchg(&kexec_crash_image) would be
* sufficient. But since I reuse the memory...
*/
- if (mutex_trylock(&kexec_mutex)) {
+ if (kexec_trylock()) {
if (kexec_crash_image) {
struct pt_regs fixed_regs;
@@ -976,7 +976,7 @@ void __noclone __crash_kexec(struct pt_regs *regs)
machine_crash_shutdown(&fixed_regs);
machine_kexec(kexec_crash_image);
}
- mutex_unlock(&kexec_mutex);
+ kexec_unlock();
}
}
STACK_FRAME_NON_STANDARD(__crash_kexec);
@@ -1004,14 +1004,17 @@ void crash_kexec(struct pt_regs *regs)
}
}
-size_t crash_get_memory_size(void)
+ssize_t crash_get_memory_size(void)
{
- size_t size = 0;
+ ssize_t size = 0;
+
+ if (!kexec_trylock())
+ return -EBUSY;
- mutex_lock(&kexec_mutex);
if (crashk_res.end != crashk_res.start)
size = resource_size(&crashk_res);
- mutex_unlock(&kexec_mutex);
+
+ kexec_unlock();
return size;
}
@@ -1022,7 +1025,8 @@ int crash_shrink_memory(unsigned long new_size)
unsigned long old_size;
struct resource *ram_res;
- mutex_lock(&kexec_mutex);
+ if (!kexec_trylock())
+ return -EBUSY;
if (kexec_crash_image) {
ret = -ENOENT;
@@ -1060,7 +1064,7 @@ int crash_shrink_memory(unsigned long new_size)
insert_resource(&iomem_resource, ram_res);
unlock:
- mutex_unlock(&kexec_mutex);
+ kexec_unlock();
return ret;
}
@@ -1132,7 +1136,7 @@ int kernel_kexec(void)
{
int error = 0;
- if (!mutex_trylock(&kexec_mutex))
+ if (!kexec_trylock())
return -EBUSY;
if (!kexec_image) {
error = -EINVAL;
@@ -1208,6 +1212,6 @@ int kernel_kexec(void)
#endif
Unlock:
- mutex_unlock(&kexec_mutex);
+ kexec_unlock();
return error;
}
diff --git a/kernel/kexec_file.c b/kernel/kexec_file.c
index 1d546dc97c502..45637511e0de6 100644
--- a/kernel/kexec_file.c
+++ b/kernel/kexec_file.c
@@ -339,7 +339,7 @@ SYSCALL_DEFINE5(kexec_file_load, int, kernel_fd, int, initrd_fd,
image = NULL;
- if (!mutex_trylock(&kexec_mutex))
+ if (!kexec_trylock())
return -EBUSY;
dest_image = &kexec_image;
@@ -411,7 +411,7 @@ SYSCALL_DEFINE5(kexec_file_load, int, kernel_fd, int, initrd_fd,
if ((flags & KEXEC_FILE_ON_CRASH) && kexec_crash_image)
arch_kexec_protect_crashkres();
- mutex_unlock(&kexec_mutex);
+ kexec_unlock();
kimage_free(image);
return ret;
}
diff --git a/kernel/kexec_internal.h b/kernel/kexec_internal.h
index 48aaf2ac0d0d1..74da1409cd14b 100644
--- a/kernel/kexec_internal.h
+++ b/kernel/kexec_internal.h
@@ -13,7 +13,20 @@ void kimage_terminate(struct kimage *image);
int kimage_is_destination_range(struct kimage *image,
unsigned long start, unsigned long end);
-extern struct mutex kexec_mutex;
+/*
+ * Whatever is used to serialize accesses to the kexec_crash_image needs to be
+ * NMI safe, as __crash_kexec() can happen during nmi_panic(), so here we use a
+ * "simple" atomic variable that is acquired with a cmpxchg().
+ */
+extern atomic_t __kexec_lock;
+static inline bool kexec_trylock(void)
+{
+ return atomic_cmpxchg_acquire(&__kexec_lock, 0, 1) == 0;
+}
+static inline void kexec_unlock(void)
+{
+ atomic_set_release(&__kexec_lock, 0);
+}
#ifdef CONFIG_KEXEC_FILE
#include <linux/purgatory.h>
diff --git a/kernel/ksysfs.c b/kernel/ksysfs.c
index b1292a57c2a53..65dba9076f312 100644
--- a/kernel/ksysfs.c
+++ b/kernel/ksysfs.c
@@ -105,7 +105,12 @@ KERNEL_ATTR_RO(kexec_crash_loaded);
static ssize_t kexec_crash_size_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
- return sprintf(buf, "%zu\n", crash_get_memory_size());
+ ssize_t size = crash_get_memory_size();
+
+ if (size < 0)
+ return size;
+
+ return sprintf(buf, "%zd\n", size);
}
static ssize_t kexec_crash_size_store(struct kobject *kobj,
struct kobj_attribute *attr,
diff --git a/kernel/latencytop.c b/kernel/latencytop.c
index 76166df011a4d..781249098cb6e 100644
--- a/kernel/latencytop.c
+++ b/kernel/latencytop.c
@@ -112,7 +112,7 @@ static void __sched
account_global_scheduler_latency(struct task_struct *tsk,
struct latency_record *lat)
{
- int firstnonnull = MAXLR + 1;
+ int firstnonnull = MAXLR;
int i;
/* skip kernel threads for now */
@@ -150,7 +150,7 @@ account_global_scheduler_latency(struct task_struct *tsk,
}
i = firstnonnull;
- if (i >= MAXLR - 1)
+ if (i >= MAXLR)
return;
/* Allocted a new one: */
diff --git a/kernel/profile.c b/kernel/profile.c
index 7ea01ba30e757..8a77769bc4b4c 100644
--- a/kernel/profile.c
+++ b/kernel/profile.c
@@ -59,43 +59,39 @@ int profile_setup(char *str)
static const char schedstr[] = "schedule";
static const char sleepstr[] = "sleep";
static const char kvmstr[] = "kvm";
+ const char *select = NULL;
int par;
if (!strncmp(str, sleepstr, strlen(sleepstr))) {
#ifdef CONFIG_SCHEDSTATS
force_schedstat_enabled();
prof_on = SLEEP_PROFILING;
- if (str[strlen(sleepstr)] == ',')
- str += strlen(sleepstr) + 1;
- if (get_option(&str, &par))
- prof_shift = clamp(par, 0, BITS_PER_LONG - 1);
- pr_info("kernel sleep profiling enabled (shift: %u)\n",
- prof_shift);
+ select = sleepstr;
#else
pr_warn("kernel sleep profiling requires CONFIG_SCHEDSTATS\n");
#endif /* CONFIG_SCHEDSTATS */
} else if (!strncmp(str, schedstr, strlen(schedstr))) {
prof_on = SCHED_PROFILING;
- if (str[strlen(schedstr)] == ',')
- str += strlen(schedstr) + 1;
- if (get_option(&str, &par))
- prof_shift = clamp(par, 0, BITS_PER_LONG - 1);
- pr_info("kernel schedule profiling enabled (shift: %u)\n",
- prof_shift);
+ select = schedstr;
} else if (!strncmp(str, kvmstr, strlen(kvmstr))) {
prof_on = KVM_PROFILING;
- if (str[strlen(kvmstr)] == ',')
- str += strlen(kvmstr) + 1;
- if (get_option(&str, &par))
- prof_shift = clamp(par, 0, BITS_PER_LONG - 1);
- pr_info("kernel KVM profiling enabled (shift: %u)\n",
- prof_shift);
+ select = kvmstr;
} else if (get_option(&str, &par)) {
prof_shift = clamp(par, 0, BITS_PER_LONG - 1);
prof_on = CPU_PROFILING;
pr_info("kernel profiling enabled (shift: %u)\n",
prof_shift);
}
+
+ if (select) {
+ if (str[strlen(select)] == ',')
+ str += strlen(select) + 1;
+ if (get_option(&str, &par))
+ prof_shift = clamp(par, 0, BITS_PER_LONG - 1);
+ pr_info("kernel %s profiling enabled (shift: %u)\n",
+ select, prof_shift);
+ }
+
return 1;
}
__setup("profile=", profile_setup);
diff --git a/kernel/smpboot.c b/kernel/smpboot.c
index b9f54544e7499..2c7396da470c5 100644
--- a/kernel/smpboot.c
+++ b/kernel/smpboot.c
@@ -433,7 +433,7 @@ bool cpu_wait_death(unsigned int cpu, int seconds)
/* The outgoing CPU will normally get done quite quickly. */
if (atomic_read(&per_cpu(cpu_hotplug_state, cpu)) == CPU_DEAD)
- goto update_state;
+ goto update_state_early;
udelay(5);
/* But if the outgoing CPU dawdles, wait increasingly long times. */
@@ -444,16 +444,17 @@ bool cpu_wait_death(unsigned int cpu, int seconds)
break;
sleep_jf = DIV_ROUND_UP(sleep_jf * 11, 10);
}
-update_state:
+update_state_early:
oldstate = atomic_read(&per_cpu(cpu_hotplug_state, cpu));
+update_state:
if (oldstate == CPU_DEAD) {
/* Outgoing CPU died normally, update state. */
smp_mb(); /* atomic_read() before update. */
atomic_set(&per_cpu(cpu_hotplug_state, cpu), CPU_POST_DEAD);
} else {
/* Outgoing CPU still hasn't died, set state accordingly. */
- if (atomic_cmpxchg(&per_cpu(cpu_hotplug_state, cpu),
- oldstate, CPU_BROKEN) != oldstate)
+ if (!atomic_try_cmpxchg(&per_cpu(cpu_hotplug_state, cpu),
+ &oldstate, CPU_BROKEN))
goto update_state;
ret = false;
}
@@ -475,14 +476,14 @@ bool cpu_report_death(void)
int newstate;
int cpu = smp_processor_id();
+ oldstate = atomic_read(&per_cpu(cpu_hotplug_state, cpu));
do {
- oldstate = atomic_read(&per_cpu(cpu_hotplug_state, cpu));
if (oldstate != CPU_BROKEN)
newstate = CPU_DEAD;
else
newstate = CPU_DEAD_FROZEN;
- } while (atomic_cmpxchg(&per_cpu(cpu_hotplug_state, cpu),
- oldstate, newstate) != oldstate);
+ } while (!atomic_try_cmpxchg(&per_cpu(cpu_hotplug_state, cpu),
+ &oldstate, newstate));
return newstate == CPU_DEAD;
}
diff --git a/kernel/task_work.c b/kernel/task_work.c
index dff75bcde1514..065e1ef8fc8d7 100644
--- a/kernel/task_work.c
+++ b/kernel/task_work.c
@@ -47,12 +47,12 @@ int task_work_add(struct task_struct *task, struct callback_head *work,
/* record the work call stack in order to print it in KASAN reports */
kasan_record_aux_stack(work);
+ head = READ_ONCE(task->task_works);
do {
- head = READ_ONCE(task->task_works);
if (unlikely(head == &work_exited))
return -ESRCH;
work->next = head;
- } while (cmpxchg(&task->task_works, head, work) != head);
+ } while (!try_cmpxchg(&task->task_works, &head, work));
switch (notify) {
case TWA_NONE:
@@ -100,10 +100,12 @@ task_work_cancel_match(struct task_struct *task,
* we raced with task_work_run(), *pprev == NULL/exited.
*/
raw_spin_lock_irqsave(&task->pi_lock, flags);
- while ((work = READ_ONCE(*pprev))) {
- if (!match(work, data))
+ work = READ_ONCE(*pprev);
+ while (work) {
+ if (!match(work, data)) {
pprev = &work->next;
- else if (cmpxchg(pprev, work, work->next) == work)
+ work = READ_ONCE(*pprev);
+ } else if (try_cmpxchg(pprev, &work, work->next))
break;
}
raw_spin_unlock_irqrestore(&task->pi_lock, flags);
@@ -151,16 +153,16 @@ void task_work_run(void)
* work->func() can do task_work_add(), do not set
* work_exited unless the list is empty.
*/
+ work = READ_ONCE(task->task_works);
do {
head = NULL;
- work = READ_ONCE(task->task_works);
if (!work) {
if (task->flags & PF_EXITING)
head = &work_exited;
else
break;
}
- } while (cmpxchg(&task->task_works, work, head) != work);
+ } while (!try_cmpxchg(&task->task_works, &work, head));
if (!work)
break;
diff --git a/kernel/utsname_sysctl.c b/kernel/utsname_sysctl.c
index 4ca61d49885b6..7ffdd2cd5ff9b 100644
--- a/kernel/utsname_sysctl.c
+++ b/kernel/utsname_sysctl.c
@@ -73,6 +73,13 @@ static DEFINE_CTL_TABLE_POLL(hostname_poll);
static DEFINE_CTL_TABLE_POLL(domainname_poll);
static struct ctl_table uts_kern_table[] = {
+ {
+ .procname = "arch",
+ .data = init_uts_ns.name.machine,
+ .maxlen = sizeof(init_uts_ns.name.machine),
+ .mode = 0444,
+ .proc_handler = proc_do_uts_string,
+ },
{
.procname = "ostype",
.data = init_uts_ns.name.sysname,
diff --git a/lib/cmdline.c b/lib/cmdline.c
index 5546bf5887806..90ed997d95701 100644
--- a/lib/cmdline.c
+++ b/lib/cmdline.c
@@ -260,7 +260,7 @@ char *next_arg(char *args, char **param, char **val)
args[i-1] = '\0';
}
}
- if (quoted && args[i-1] == '"')
+ if (quoted && i > 0 && args[i-1] == '"')
args[i-1] = '\0';
if (args[i]) {
diff --git a/lib/earlycpio.c b/lib/earlycpio.c
index 7921193f04243..d2c37d64fd0c3 100644
--- a/lib/earlycpio.c
+++ b/lib/earlycpio.c
@@ -126,7 +126,7 @@ struct cpio_data find_cpio_data(const char *path, void *data,
"File %s exceeding MAX_CPIO_FILE_NAME [%d]\n",
p, MAX_CPIO_FILE_NAME);
}
- strlcpy(cd.name, p + mypathsize, MAX_CPIO_FILE_NAME);
+ strscpy(cd.name, p + mypathsize, MAX_CPIO_FILE_NAME);
cd.data = (void *)dptr;
cd.size = ch[C_FILESIZE];
diff --git a/lib/llist.c b/lib/llist.c
index 611ce4881a875..7d78b736e8afd 100644
--- a/lib/llist.c
+++ b/lib/llist.c
@@ -30,7 +30,7 @@ bool llist_add_batch(struct llist_node *new_first, struct llist_node *new_last,
do {
new_last->next = first = READ_ONCE(head->first);
- } while (cmpxchg(&head->first, first, new_first) != first);
+ } while (!try_cmpxchg(&head->first, &first, new_first));
return !first;
}
@@ -52,18 +52,14 @@ EXPORT_SYMBOL_GPL(llist_add_batch);
*/
struct llist_node *llist_del_first(struct llist_head *head)
{
- struct llist_node *entry, *old_entry, *next;
+ struct llist_node *entry, *next;
entry = smp_load_acquire(&head->first);
- for (;;) {
+ do {
if (entry == NULL)
return NULL;
- old_entry = entry;
next = READ_ONCE(entry->next);
- entry = cmpxchg(&head->first, old_entry, next);
- if (entry == old_entry)
- break;
- }
+ } while (!try_cmpxchg(&head->first, &entry, next));
return entry;
}
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index b5ed31d631fac..2737e4ced5745 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -576,10 +576,14 @@ sub hash_show_words {
(?:__)?(?:u|s|be|le)(?:8|16|32|64)|
atomic_t
)};
+our $typeStdioTypedefs = qr{(?x:
+ FILE
+)};
our $typeTypedefs = qr{(?x:
$typeC99Typedefs\b|
$typeOtherOSTypedefs\b|
- $typeKernelTypedefs\b
+ $typeKernelTypedefs\b|
+ $typeStdioTypedefs\b
)};
our $zero_initializer = qr{(?:(?:0[xX])?0+$Int_type?|NULL|false)\b};
@@ -807,6 +811,8 @@ sub find_standard_signature {
"rcu_barrier_sched" => "rcu_barrier",
"get_state_synchronize_sched" => "get_state_synchronize_rcu",
"cond_synchronize_sched" => "cond_synchronize_rcu",
+ "kmap" => "kmap_local_page",
+ "kmap_atomic" => "kmap_local_page",
);
#Create a search pattern for all these strings to speed up a loop below
diff --git a/scripts/decodecode b/scripts/decodecode
index c711a196511c6..b28fd26865617 100755
--- a/scripts/decodecode
+++ b/scripts/decodecode
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
# Disassemble the Code: line in Linux oopses
# usage: decodecode < oops.file
@@ -8,6 +8,8 @@
# AFLAGS=--32 decodecode < 386.oops
# PC=hex - the PC (program counter) the oops points to
+faultlinenum=1
+
cleanup() {
rm -f $T $T.s $T.o $T.oo $T.aa $T.dis
exit 1
@@ -102,28 +104,125 @@ disas() {
grep -v "/tmp\|Disassembly\|\.text\|^$" > $t.dis 2>&1
}
+# Match the maximum number of opcode bytes from @op_bytes contained within
+# @opline
+#
+# Params:
+# @op_bytes: The string of bytes from the Code: line
+# @opline: The disassembled line coming from objdump
+#
+# Returns:
+# The max number of opcode bytes from the beginning of @op_bytes which match
+# the opcode bytes in the objdump line.
+get_substr_opcode_bytes_num()
+{
+ local op_bytes=$1
+ local opline=$2
+
+ local retval=0
+ substr=""
+
+ for opc in $op_bytes;
+ do
+ substr+="$opc"
+
+ # return if opcode bytes do not match @opline anymore
+ if ! echo $opline | grep -q "$substr";
+ then
+ break
+ fi
+
+ # add trailing space
+ substr+=" "
+ retval=$((retval+1))
+ done
+
+ return $retval
+}
+
+# Return the line number in objdump output to where the IP marker in the Code:
+# line points to
+#
+# Params:
+# @all_code: code in bytes without the marker
+# @dis_file: disassembled file
+# @ip_byte: The byte to which the IP points to
+get_faultlinenum()
+{
+ local all_code="$1"
+ local dis_file="$2"
+
+ # num bytes including IP byte
+ local num_bytes_ip=$(( $3 + 1 * $width ))
+
+ # Add the two header lines (we're counting from 1).
+ local retval=3
+
+ # remove marker
+ all_code=$(echo $all_code | sed -e 's/[<>()]//g')
+
+ while read line
+ do
+ get_substr_opcode_bytes_num "$all_code" "$line"
+ ate_opcodes=$?
+
+ if ! (( $ate_opcodes )); then
+ continue
+ fi
+
+ num_bytes_ip=$((num_bytes_ip - ($ate_opcodes * $width) ))
+ if (( $num_bytes_ip <= 0 )); then
+ break
+ fi
+
+ # Delete matched opcode bytes from all_code. For that, compute
+ # how many chars those opcodes are represented by and include
+ # trailing space.
+ #
+ # a byte is 2 chars, ate_opcodes is also the number of trailing
+ # spaces
+ del_chars=$(( ($ate_opcodes * $width * 2) + $ate_opcodes ))
+
+ all_code=$(echo $all_code | sed -e "s!^.\{$del_chars\}!!")
+
+ let "retval+=1"
+
+ done < $dis_file
+
+ return $retval
+}
+
marker=`expr index "$code" "\<"`
if [ $marker -eq 0 ]; then
marker=`expr index "$code" "\("`
fi
-
touch $T.oo
if [ $marker -ne 0 ]; then
- # 2 opcode bytes and a single space
- pc_sub=$(( $marker / 3 ))
+ # How many bytes to subtract from the program counter
+ # in order to get to the beginning virtual address of the
+ # Code:
+ pc_sub=$(( (($marker - 1) / (2 * $width + 1)) * $width ))
echo All code >> $T.oo
echo ======== >> $T.oo
beforemark=`echo "$code"`
echo -n " .$type 0x" > $T.s
+
echo $beforemark | sed -e 's/ /,0x/g; s/[<>()]//g' >> $T.s
+
disas $T $pc_sub
+
cat $T.dis >> $T.oo
- rm -f $T.o $T.s $T.dis
-# and fix code at-and-after marker
+ get_faultlinenum "$code" "$T.dis" $pc_sub
+ faultlinenum=$?
+
+ # and fix code at-and-after marker
code=`echo "$code" | cut -c$((${marker} + 1))-`
+
+ rm -f $T.o $T.s $T.dis
fi
+
echo Code starting with the faulting instruction > $T.aa
echo =========================================== >> $T.aa
code=`echo $code | sed -e 's/\r//;s/ [<(]/ /;s/[>)] / /;s/ /,0x/g; s/[>)]$//'`
@@ -132,15 +231,6 @@ echo $code >> $T.s
disas $T 0
cat $T.dis >> $T.aa
-# (lines of whole $T.oo) - (lines of $T.aa, i.e. "Code starting") + 3,
-# i.e. the title + the "===..=" line (sed is counting from 1, 0 address is
-# special)
-faultlinenum=$(( $(wc -l $T.oo | cut -d" " -f1) - \
- $(wc -l $T.aa | cut -d" " -f1) + 3))
-
-faultline=`cat $T.dis | head -1 | cut -d":" -f2-`
-faultline=`echo "$faultline" | sed -e 's/\[/\\\[/g; s/\]/\\\]/g'`
-
cat $T.oo | sed -e "${faultlinenum}s/^\([^:]*:\)\(.*\)/\1\*\2\t\t<-- trapping instruction/"
echo
cat $T.aa
diff --git a/tools/testing/selftests/proc/proc-pid-vm.c b/tools/testing/selftests/proc/proc-pid-vm.c
index e5962f4794f56..69551bfa215c4 100644
--- a/tools/testing/selftests/proc/proc-pid-vm.c
+++ b/tools/testing/selftests/proc/proc-pid-vm.c
@@ -213,22 +213,22 @@ static int make_exe(const uint8_t *payload, size_t len)
/*
* 0: vsyscall VMA doesn't exist vsyscall=none
- * 1: vsyscall VMA is r-xp vsyscall=emulate
- * 2: vsyscall VMA is --xp vsyscall=xonly
+ * 1: vsyscall VMA is --xp vsyscall=xonly
+ * 2: vsyscall VMA is r-xp vsyscall=emulate
*/
-static int g_vsyscall;
+static volatile int g_vsyscall;
static const char *str_vsyscall;
static const char str_vsyscall_0[] = "";
static const char str_vsyscall_1[] =
-"ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall]\n";
-static const char str_vsyscall_2[] =
"ffffffffff600000-ffffffffff601000 --xp 00000000 00:00 0 [vsyscall]\n";
+static const char str_vsyscall_2[] =
+"ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall]\n";
#ifdef __x86_64__
static void sigaction_SIGSEGV(int _, siginfo_t *__, void *___)
{
- _exit(1);
+ _exit(g_vsyscall);
}
/*
@@ -255,6 +255,7 @@ static void vsyscall(void)
act.sa_sigaction = sigaction_SIGSEGV;
(void)sigaction(SIGSEGV, &act, NULL);
+ g_vsyscall = 0;
/* gettimeofday(NULL, NULL); */
asm volatile (
"call %P0"
@@ -262,45 +263,20 @@ static void vsyscall(void)
: "i" (0xffffffffff600000), "D" (NULL), "S" (NULL)
: "rax", "rcx", "r11"
);
- exit(0);
- }
- waitpid(pid, &wstatus, 0);
- if (WIFEXITED(wstatus) && WEXITSTATUS(wstatus) == 0) {
- /* vsyscall page exists and is executable. */
- } else {
- /* vsyscall page doesn't exist. */
- g_vsyscall = 0;
- return;
- }
-
- pid = fork();
- if (pid < 0) {
- fprintf(stderr, "fork, errno %d\n", errno);
- exit(1);
- }
- if (pid == 0) {
- struct rlimit rlim = {0, 0};
- (void)setrlimit(RLIMIT_CORE, &rlim);
-
- /* Hide "segfault at ffffffffff600000" messages. */
- struct sigaction act;
- memset(&act, 0, sizeof(struct sigaction));
- act.sa_flags = SA_SIGINFO;
- act.sa_sigaction = sigaction_SIGSEGV;
- (void)sigaction(SIGSEGV, &act, NULL);
+ g_vsyscall = 1;
*(volatile int *)0xffffffffff600000UL;
- exit(0);
+
+ g_vsyscall = 2;
+ exit(g_vsyscall);
}
waitpid(pid, &wstatus, 0);
- if (WIFEXITED(wstatus) && WEXITSTATUS(wstatus) == 0) {
- /* vsyscall page is readable and executable. */
- g_vsyscall = 1;
- return;
+ if (WIFEXITED(wstatus)) {
+ g_vsyscall = WEXITSTATUS(wstatus);
+ } else {
+ fprintf(stderr, "error: wstatus %08x\n", wstatus);
+ exit(1);
}
-
- /* vsyscall page is executable but unreadable. */
- g_vsyscall = 2;
}
int main(void)