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x86/asm: Use CC_SET()/CC_OUT() in __cmpxchg_double()

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Replace open-coded use of the SETcc instruction with CC_SET()/CC_OUT()
in __cmpxchg_double().

Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Link: https://lkml.kernel.org/r/CAFULd4YdvwwhXWHqqPsGk5+TLG71ozgSscTZNsqmrm+Jzg941w@mail.gmail.com
This commit is contained in:
Uros Bizjak 2018-09-28 10:33:05 +02:00 committed by Borislav Petkov
parent 02101c45ec
commit c808c09b52
1 changed files with 6 additions and 4 deletions
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10
arch/x86/include/asm/cmpxchg.h
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@ -242,10 +242,12 @@ extern void __add_wrong_size(void)
BUILD_BUG_ON(sizeof(*(p2)) != sizeof(long)); \
VM_BUG_ON((unsigned long)(p1) % (2 * sizeof(long))); \
VM_BUG_ON((unsigned long)((p1) + 1) != (unsigned long)(p2)); \
asm volatile(pfx "cmpxchg%c4b %2; sete %0" \
: "=a" (__ret), "+d" (__old2), \
"+m" (*(p1)), "+m" (*(p2)) \
: "i" (2 * sizeof(long)), "a" (__old1), \
asm volatile(pfx "cmpxchg%c5b %1" \
CC_SET(e) \
: CC_OUT(e) (__ret), \
"+m" (*(p1)), "+m" (*(p2)), \
"+a" (__old1), "+d" (__old2) \
: "i" (2 * sizeof(long)), \
"b" (__new1), "c" (__new2)); \
__ret; \
})