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ARM: Use a definition for the userspace cmpxchg emulation syscall

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Use a definition for the cmpxchg SWI instead of hard-coding the number.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Acked-by: Nicolas Pitre <nico@fluxnic.net>
This commit is contained in:
Russell King
2009-11-09 23:53:29 +00:00
parent bfd2e29f04
commit cc20d42986
3 changed files with 14 additions and 4 deletions
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9
arch/arm/include/asm/unistd.h
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@@ -402,6 +402,15 @@
#define __ARM_NR_usr32 (__ARM_NR_BASE+4)
#define __ARM_NR_set_tls (__ARM_NR_BASE+5)
/*
* *NOTE*: This is a ghost syscall private to the kernel. Only the
* __kuser_cmpxchg code in entry-armv.S should be aware of its
* existence. Don't ever use this from user code.
*/
#ifdef __KERNEL__
#define __ARM_NR_cmpxchg (__ARM_NR_BASE+0x00fff0)
#endif
/*
* The following syscalls are obsolete and no longer available for EABI.
*/