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

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

diff --git a/arch/x86/include/asm/cmpxchg.h b/arch/x86/include/asm/cmpxchg.h
index a55d79b233d334df17941f60ba78c6b8f5acd04d..bfb85e5844ab8348a2b9332870ce3b5dcd67cbe5 100644 (file)
--- a/arch/x86/include/asm/cmpxchg.h
+++ b/arch/x86/include/asm/cmpxchg.h
@@ -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;                                                          \
 })