[tip: locking/core] locking/atomic/x86: Correct the definition of __arch_try_cmpxchg128()

[tip-bot2 for Uros Bizjak]

The following commit has been merged into the locking/core branch of tip:

Commit-ID:     929ad065ba2967be238dfdc0895b79fda62c7f16
Gitweb:        https://git.kernel.org/tip/929ad065ba2967be238dfdc0895b79fda62c7f16
Author:        Uros Bizjak <ubizjak@xxxxxxxxx>
AuthorDate:    Mon, 08 Apr 2024 11:13:56 +02:00
Committer:     Ingo Molnar <mingo@xxxxxxxxxx>
CommitterDate: Tue, 09 Apr 2024 09:51:02 +02:00

locking/atomic/x86: Correct the definition of __arch_try_cmpxchg128()

Correct the definition of __arch_try_cmpxchg128(), introduced by:

  b23e139d0b66 ("arch: Introduce arch_{,try_}_cmpxchg128{,_local}()")

Fixes: b23e139d0b66 ("arch: Introduce arch_{,try_}_cmpxchg128{,_local}()")
Signed-off-by: Uros Bizjak <ubizjak@xxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Link: https://lore.kernel.org/r/20240408091547.90111-2-ubizjak@xxxxxxxxx
---
 arch/x86/include/asm/cmpxchg_64.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/include/asm/cmpxchg_64.h b/arch/x86/include/asm/cmpxchg_64.h
index 44b08b5..c1d6cd5 100644
--- a/arch/x86/include/asm/cmpxchg_64.h
+++ b/arch/x86/include/asm/cmpxchg_64.h
@@ -62,7 +62,7 @@ static __always_inline u128 arch_cmpxchg128_local(volatile u128 *ptr, u128 old, 
 	asm volatile(_lock "cmpxchg16b %[ptr]"				\
 		     CC_SET(e)						\
 		     : CC_OUT(e) (ret),					\
-		       [ptr] "+m" (*ptr),				\
+		       [ptr] "+m" (*(_ptr)),				\
 		       "+a" (o.low), "+d" (o.high)			\
 		     : "b" (n.low), "c" (n.high)			\
 		     : "memory");					\