Merge branch 'parisc-4.5-2' of git://git.kernel.org/pub/scm/linux/ker…

…nel/git/deller/parisc-linux Pull parisc fixes from Helge Deller: "We wire up the copy_file_range syscall, fix two bugs in the parisc ptrace code and have a trivial fix for floppy.h to clarify an expression with parentheses" * 'parisc-4.5-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux: parisc: Wire up copy_file_range syscall parisc: Fix ptrace syscall number and return value modification parisc: Use parentheses around expression in floppy.h
mariux64 · Mar 2, 2016 · f983cd3 · f983cd3
2 parents 12f1d7e + b4f09ae
commit f983cd3
Show file tree

Hide file tree

Showing 5 changed files with 19 additions and 8 deletions.
diff --git a/arch/parisc/include/asm/floppy.h b/arch/parisc/include/asm/floppy.h
@@ -33,7 +33,7 @@
  * floppy accesses go through the track buffer.
  */
 #define _CROSS_64KB(a,s,vdma) \
-(!vdma && ((unsigned long)(a)/K_64 != ((unsigned long)(a) + (s) - 1) / K_64))
+(!(vdma) && ((unsigned long)(a)/K_64 != ((unsigned long)(a) + (s) - 1) / K_64))
 
 #define CROSS_64KB(a,s) _CROSS_64KB(a,s,use_virtual_dma & 1)
 

diff --git a/arch/parisc/include/uapi/asm/unistd.h b/arch/parisc/include/uapi/asm/unistd.h
@@ -361,8 +361,9 @@
 #define __NR_membarrier		(__NR_Linux + 343)
 #define __NR_userfaultfd	(__NR_Linux + 344)
 #define __NR_mlock2		(__NR_Linux + 345)
+#define __NR_copy_file_range	(__NR_Linux + 346)
 
-#define __NR_Linux_syscalls	(__NR_mlock2 + 1)
+#define __NR_Linux_syscalls	(__NR_copy_file_range + 1)
 
 
 #define __IGNORE_select		/* newselect */

diff --git a/arch/parisc/kernel/ptrace.c b/arch/parisc/kernel/ptrace.c
@@ -269,14 +269,19 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
 
 long do_syscall_trace_enter(struct pt_regs *regs)
 {
-	long ret = 0;
-
 	/* Do the secure computing check first. */
 	secure_computing_strict(regs->gr[20]);
 
 	if (test_thread_flag(TIF_SYSCALL_TRACE) &&
-	    tracehook_report_syscall_entry(regs))
-		ret = -1L;
+	    tracehook_report_syscall_entry(regs)) {
+		/*
+		 * Tracing decided this syscall should not happen or the
+		 * debugger stored an invalid system call number. Skip
+		 * the system call and the system call restart handling.
+		 */
+		regs->gr[20] = -1UL;
+		goto out;
+	}
 
 #ifdef CONFIG_64BIT
 	if (!is_compat_task())
@@ -290,7 +295,8 @@ long do_syscall_trace_enter(struct pt_regs *regs)
 			regs->gr[24] & 0xffffffff,
 			regs->gr[23] & 0xffffffff);
 
-	return ret ? : regs->gr[20];
+out:
+	return regs->gr[20];
 }
 
 void do_syscall_trace_exit(struct pt_regs *regs)

diff --git a/arch/parisc/kernel/syscall.S b/arch/parisc/kernel/syscall.S
@@ -343,7 +343,7 @@ tracesys_next:
 #endif
 
 	comiclr,>>=	__NR_Linux_syscalls, %r20, %r0
-	b,n	.Lsyscall_nosys
+	b,n	.Ltracesys_nosys
 
 	LDREGX  %r20(%r19), %r19
 
@@ -359,6 +359,9 @@ tracesys_next:
 	be      0(%sr7,%r19)
 	ldo	R%tracesys_exit(%r2),%r2
 
+.Ltracesys_nosys:
+	ldo	-ENOSYS(%r0),%r28		/* set errno */
+
 	/* Do *not* call this function on the gateway page, because it
 	makes a direct call to syscall_trace. */
 

diff --git a/arch/parisc/kernel/syscall_table.S b/arch/parisc/kernel/syscall_table.S
@@ -441,6 +441,7 @@
 	ENTRY_SAME(membarrier)
 	ENTRY_SAME(userfaultfd)
 	ENTRY_SAME(mlock2)		/* 345 */
+	ENTRY_SAME(copy_file_range)
 
 
 .ifne (. - 90b) - (__NR_Linux_syscalls * (91b - 90b))