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[ARM] 3271/1: ARM EABI: fix calling of cmpxchg syscall emulation

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Patch from Nicolas Pitre

This is kernel provided user space code.

Since a syscall is used, it has to be updated to work with EABI.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Nicolas Pitre 2006-01-18 22:38:49 +00:00 committed by Russell King
parent fcca538b83
commit 5e0974459d
1 changed files with 4 additions and 1 deletions
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5
arch/arm/kernel/entry-armv.S
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@ -735,8 +735,11 @@ __kuser_cmpxchg: @ 0xffff0fc0
* The kernel itself must perform the operation.
* A special ghost syscall is used for that (see traps.c).
*/
stmfd sp!, {r7, lr}
mov r7, #0xff00 @ 0xfff0 into r7 for EABI
orr r7, r7, #0xf0
swi #0x9ffff0
mov pc, lr
ldmfd sp!, {r7, pc}
#elif __LINUX_ARM_ARCH__ < 6