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| author | Dave Martin <dave.martin@linaro.org> | 2010-12-01 18:05:13 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-12-04 11:00:52 +0000 |
| commit | 0946b8c5c5982088a26da7ad99e8bcf57f972fb5 (patch) | |
| tree | 2a76931b417a271b132132accee88b58c96dfd94 /arch/arm/include | |
| parent | cb5d39b3a1440eca79c742d95f1d78180c272286 (diff) | |
| download | linux-0946b8c5c5982088a26da7ad99e8bcf57f972fb5.tar.gz | |
ARM: 6517/1: kexec: Add missing memory clobber to inline asm in crash_setup_regs()
Currently, the inline asm is passed &newregs->ARM_r0 as in input, when modifying multiple fields of newregs. It's plausible to assume that GCC will assume newregs->ARM_r0 is modified when passed the address, but unfortunately this assumption is incorrect. Also, GCC has no way to guess that the other ARM_r* fields are modified without the addition of a "memory" clobber. Signed-off-by: Dave Martin <dave.martin@linaro.org> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/include')
| -rw-r--r-- | arch/arm/include/asm/kexec.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm/include/asm/kexec.h b/arch/arm/include/asm/kexec.h index 8ec9ef5c3c7b..b37e02c91693 100644 --- a/arch/arm/include/asm/kexec.h +++ b/arch/arm/include/asm/kexec.h @@ -34,7 +34,7 @@ static inline void crash_setup_regs(struct pt_regs *newregs, memcpy(newregs, oldregs, sizeof(*newregs)); } else { __asm__ __volatile__ ("stmia %0, {r0 - r15}" - : : "r" (&newregs->ARM_r0)); + : : "r" (&newregs->ARM_r0) : "memory"); __asm__ __volatile__ ("mrs %0, cpsr" : "=r" (newregs->ARM_cpsr)); } |