From 2f174847b0fdd4eb9f482030a284db24aef7a97f Mon Sep 17 00:00:00 2001
From: eric miao <eric.y.miao@gmail.com>
Date: Thu, 12 Aug 2010 16:43:00 +0100
Subject: [PATCH 1/5] ARM: 6326/1: kgdb: fix GDB_MAX_REGS no longer used
According to commit 22eeef4bb2a7fd225089c0044060ed1fbf091958
kgdb,arm: Individual register get/set for arm
It's now replaced by DBG_MAX_REG_NUM.
Cc: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
arch/arm/kernel/kgdb.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/kernel/kgdb.c b/arch/arm/kernel/kgdb.c
index 778c2f7024ff5..d6e8b4d2e60da 100644
--- a/arch/arm/kernel/kgdb.c
+++ b/arch/arm/kernel/kgdb.c
@@ -79,7 +79,7 @@ sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *task)
return;
/* Initialize to zero */
- for (regno = 0; regno < GDB_MAX_REGS; regno++)
+ for (regno = 0; regno < DBG_MAX_REG_NUM; regno++)
gdb_regs[regno] = 0;
/* Otherwise, we have only some registers from switch_to() */
From bd365591dfb942d1447b8043e21e8ff112630db4 Mon Sep 17 00:00:00 2001
From: Michal Marek <mmarek@suse.cz>
Date: Sat, 14 Aug 2010 23:56:21 +0100
Subject: [PATCH 2/5] ARM: 6328/1: Build with -fno-dwarf2-cfi-asm
Commit d0679c7 restricted this workaround to powerpc only, but it turns
out that ARM needs it as well. Fixes
https://bugzilla.kernel.org/show_bug.cgi?id=16310 .
Reported-and-Tested-by: Robert Nelson <robertcnelson@gmail.com>
Acked-by: Mikael Pettersson <mikpe@it.uu.se>
Signed-off-by: Michal Marek <mmarek@suse.cz>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
arch/arm/Makefile | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 99b8200138d20..59c1ce858fc8b 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -21,6 +21,9 @@ GZFLAGS :=-9
# Explicitly specifiy 32-bit ARM ISA since toolchain default can be -mthumb:
KBUILD_CFLAGS +=$(call cc-option,-marm,)
+# Never generate .eh_frame
+KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
+
# Do not use arch/arm/defconfig - it's always outdated.
# Select a platform tht is kept up-to-date
KBUILD_DEFCONFIG := versatile_defconfig
From 21d93e2e29722d7832f61cc56d73fb953ee6578e Mon Sep 17 00:00:00 2001
From: Mikael Pettersson <mikpe@it.uu.se>
Date: Sun, 15 Aug 2010 10:47:23 +0100
Subject: [PATCH 3/5] ARM: 6329/1: wire up sys_accept4() on ARM
sys_accept4() was added in kernel 2.6.28, but ARM was not updated
to include it. The number and types of parameters is such that
no ARM-specific processing is needed, so wiring up sys_accept4()
just requires defining __NR_accept4 and adding a direct call in
the syscall entry table.
Tested with an EABI 2.6.35 kernel and Ulrich Drepper's original
accept4() test program, modified to define __NR_accept4 for ARM.
Using the updated unistd.h also eliminates a warning then building
glibc (2.10.2 and newer) about accept4() being unimplemented.
Signed-off-by: Mikael Pettersson <mikpe@it.uu.se>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
arch/arm/include/asm/unistd.h | 1 +
arch/arm/kernel/calls.S | 1 +
2 files changed, 2 insertions(+)
diff --git a/arch/arm/include/asm/unistd.h b/arch/arm/include/asm/unistd.h
index dd2bf53000fe4..d02cfb683487e 100644
--- a/arch/arm/include/asm/unistd.h
+++ b/arch/arm/include/asm/unistd.h
@@ -392,6 +392,7 @@
#define __NR_rt_tgsigqueueinfo (__NR_SYSCALL_BASE+363)
#define __NR_perf_event_open (__NR_SYSCALL_BASE+364)
#define __NR_recvmmsg (__NR_SYSCALL_BASE+365)
+#define __NR_accept4 (__NR_SYSCALL_BASE+366)
/*
* The following SWIs are ARM private.
diff --git a/arch/arm/kernel/calls.S b/arch/arm/kernel/calls.S
index 37ae301cc47c8..afeb71fa72cb8 100644
--- a/arch/arm/kernel/calls.S
+++ b/arch/arm/kernel/calls.S
@@ -375,6 +375,7 @@
CALL(sys_rt_tgsigqueueinfo)
CALL(sys_perf_event_open)
/* 365 */ CALL(sys_recvmmsg)
+ CALL(sys_accept4)
#ifndef syscalls_counted
.equ syscalls_padding, ((NR_syscalls + 3) & ~3) - NR_syscalls
#define syscalls_counted
From 41e2e8fd34fff909a0e40129f6ac4233ecfa67a9 Mon Sep 17 00:00:00 2001
From: Russell King <rmk+kernel@arm.linux.org.uk>
Date: Fri, 13 Aug 2010 23:33:46 +0100
Subject: [PATCH 4/5] ARM: Tighten check for allowable CPSR values
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Reviewed-by: Arve Hjønnevåg <arve@android.com>
Acked-by: Dima Zavin <dima@android.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
arch/arm/include/asm/ptrace.h | 17 +++++++++++++----
1 file changed, 13 insertions(+), 4 deletions(-)
diff --git a/arch/arm/include/asm/ptrace.h b/arch/arm/include/asm/ptrace.h
index c974be8913a76..7ce15eb15f729 100644
--- a/arch/arm/include/asm/ptrace.h
+++ b/arch/arm/include/asm/ptrace.h
@@ -158,15 +158,24 @@ struct pt_regs {
*/
static inline int valid_user_regs(struct pt_regs *regs)
{
- if (user_mode(regs) && (regs->ARM_cpsr & PSR_I_BIT) == 0) {
- regs->ARM_cpsr &= ~(PSR_F_BIT | PSR_A_BIT);
- return 1;
+ unsigned long mode = regs->ARM_cpsr & MODE_MASK;
+
+ /*
+ * Always clear the F (FIQ) and A (delayed abort) bits
+ */
+ regs->ARM_cpsr &= ~(PSR_F_BIT | PSR_A_BIT);
+
+ if ((regs->ARM_cpsr & PSR_I_BIT) == 0) {
+ if (mode == USR_MODE)
+ return 1;
+ if (elf_hwcap & HWCAP_26BIT && mode == USR26_MODE)
+ return 1;
}
/*
* Force CPSR to something logical...
*/
- regs->ARM_cpsr &= PSR_f | PSR_s | (PSR_x & ~PSR_A_BIT) | PSR_T_BIT | MODE32_BIT;
+ regs->ARM_cpsr &= PSR_f | PSR_s | PSR_x | PSR_T_BIT | MODE32_BIT;
if (!(elf_hwcap & HWCAP_26BIT))
regs->ARM_cpsr |= USR_MODE;
From 99c796df94afca5256860dd4760017f1dbb3480c Mon Sep 17 00:00:00 2001
From: Russell King <rmk+kernel@arm.linux.org.uk>
Date: Tue, 17 Aug 2010 22:13:22 +0100
Subject: [PATCH 5/5] VIDEO: amba clcd: don't disable an already disabled clock
Fix the clock enable/disable tracking in the AMBA CLCD driver so
that the driver doesn't try to disable an already disabled clock,
thereby causing the clock (if shared) to become unbalanced.
This resolves a problem with CLCD on LPC32xx ARM platforms.
Reported-by: Kevin Wells <wellsk40@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
drivers/video/amba-clcd.c | 10 ++++++++--
include/linux/amba/clcd.h | 1 +
2 files changed, 9 insertions(+), 2 deletions(-)
diff --git a/drivers/video/amba-clcd.c b/drivers/video/amba-clcd.c
index afe21e6eb5443..1c2c68356ea7e 100644
--- a/drivers/video/amba-clcd.c
+++ b/drivers/video/amba-clcd.c
@@ -80,7 +80,10 @@ static void clcdfb_disable(struct clcd_fb *fb)
/*
* Disable CLCD clock source.
*/
- clk_disable(fb->clk);
+ if (fb->clk_enabled) {
+ fb->clk_enabled = false;
+ clk_disable(fb->clk);
+ }
}
static void clcdfb_enable(struct clcd_fb *fb, u32 cntl)
@@ -88,7 +91,10 @@ static void clcdfb_enable(struct clcd_fb *fb, u32 cntl)
/*
* Enable the CLCD clock source.
*/
- clk_enable(fb->clk);
+ if (!fb->clk_enabled) {
+ fb->clk_enabled = true;
+ clk_enable(fb->clk);
+ }
/*
* Bring up by first enabling..
diff --git a/include/linux/amba/clcd.h b/include/linux/amba/clcd.h
index ca16c3801a1e7..be33b3affc8ad 100644
--- a/include/linux/amba/clcd.h
+++ b/include/linux/amba/clcd.h
@@ -150,6 +150,7 @@ struct clcd_fb {
u16 off_cntl;
u32 clcd_cntl;
u32 cmap[16];
+ bool clk_enabled;
};
static inline void clcdfb_decode(struct clcd_fb *fb, struct clcd_regs *regs)