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b08ee5f7e4
Both the 32-bit and 64-bit cmpxchg.h header define __HAVE_ARCH_CMPXCHG and there's ifdeffery which checks it. But since both bitness define it, we can just as well move it up to the main cmpxchg header and simpify a bit of code in doing that. Signed-off-by: Borislav Petkov <bp@suse.de> Link: http://lkml.kernel.org/r/20140711104338.GB17083@pd.tnic Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
24 lines
486 B
C
24 lines
486 B
C
#ifndef _ASM_X86_CMPXCHG_64_H
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#define _ASM_X86_CMPXCHG_64_H
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static inline void set_64bit(volatile u64 *ptr, u64 val)
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{
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*ptr = val;
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}
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#define cmpxchg64(ptr, o, n) \
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({ \
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BUILD_BUG_ON(sizeof(*(ptr)) != 8); \
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cmpxchg((ptr), (o), (n)); \
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})
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#define cmpxchg64_local(ptr, o, n) \
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({ \
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BUILD_BUG_ON(sizeof(*(ptr)) != 8); \
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cmpxchg_local((ptr), (o), (n)); \
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})
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#define system_has_cmpxchg_double() cpu_has_cx16
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#endif /* _ASM_X86_CMPXCHG_64_H */
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