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ARM: 6519/1: kuser: Fix incorrect cmpxchg syscall in kuser helpers 

The existing code invokes the syscall with rubbish in r7,
due to what looks like an incorrect literal load idiom.

Reviewed-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Dave Martin <dave.martin@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Dave Martin 2010-12-01 18:12:43 +01:00 committed by Russell King
parent ed7c84d548
commit 55afd264cd
1 changed files with 1 additions and 1 deletions
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2
arch/arm/kernel/entry-armv.S
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@ -911,7 +911,7 @@ __kuser_cmpxchg: @ 0xffff0fc0
* A special ghost syscall is used for that (see traps.c). * A special ghost syscall is used for that (see traps.c).
*/ */
stmfd sp!, {r7, lr} stmfd sp!, {r7, lr}
ldr r7, =1f @ it's 20 bits ldr r7, 1f @ it's 20 bits
swi __ARM_NR_cmpxchg swi __ARM_NR_cmpxchg
ldmfd sp!, {r7, pc} ldmfd sp!, {r7, pc}
1: .word __ARM_NR_cmpxchg 1: .word __ARM_NR_cmpxchg