diff mbox series

[1/2] x86/locking: Use ALT_OUTPUT_SP() for percpu_{,try_}cmpxchg{64,128}_op()

Message ID 20250113160017.17668-1-ubizjak@gmail.com (mailing list archive)
State New
Headers show
Series [1/2] x86/locking: Use ALT_OUTPUT_SP() for percpu_{,try_}cmpxchg{64,128}_op() | expand

Commit Message

Uros Bizjak Jan. 13, 2025, 3:59 p.m. UTC 
percpu_{,try_}cmpxchg{64,128}() macros use CALL instruction inside
asm statement in one of their alternatives. Use ALT_OUTPUT_SP()
macro to add required dependence on %esp register.

Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Dennis Zhou <dennis@kernel.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Christoph Lameter <cl@linux.com>
Cc: "Peter Zijlstra (Intel)" <peterz@infradead.org>
---
 arch/x86/include/asm/percpu.h | 28 ++++++++++++++--------------
 1 file changed, 14 insertions(+), 14 deletions(-)
diff mbox series

Patch

diff --git a/arch/x86/include/asm/percpu.h b/arch/x86/include/asm/percpu.h
index e525cd85f999..0ab991fba7de 100644
--- a/arch/x86/include/asm/percpu.h
+++ b/arch/x86/include/asm/percpu.h
@@ -350,9 +350,9 @@  do {									\
 									\
 	asm qual (ALTERNATIVE("call this_cpu_cmpxchg8b_emu",		\
 			      "cmpxchg8b " __percpu_arg([var]), X86_FEATURE_CX8) \
-		  : [var] "+m" (__my_cpu_var(_var)),			\
-		    "+a" (old__.low),					\
-		    "+d" (old__.high)					\
+		  : ALT_OUTPUT_SP([var] "+m" (__my_cpu_var(_var)),	\
+				  "+a" (old__.low),			\
+				  "+d" (old__.high))			\
 		  : "b" (new__.low),					\
 		    "c" (new__.high),					\
 		    "S" (&(_var))					\
@@ -381,10 +381,10 @@  do {									\
 	asm qual (ALTERNATIVE("call this_cpu_cmpxchg8b_emu",		\
 			      "cmpxchg8b " __percpu_arg([var]), X86_FEATURE_CX8) \
 		  CC_SET(z)						\
-		  : CC_OUT(z) (success),				\
-		    [var] "+m" (__my_cpu_var(_var)),			\
-		    "+a" (old__.low),					\
-		    "+d" (old__.high)					\
+		  : ALT_OUTPUT_SP(CC_OUT(z) (success),			\
+				  [var] "+m" (__my_cpu_var(_var)),	\
+				  "+a" (old__.low),			\
+				  "+d" (old__.high))			\
 		  : "b" (new__.low),					\
 		    "c" (new__.high),					\
 		    "S" (&(_var))					\
@@ -421,9 +421,9 @@  do {									\
 									\
 	asm qual (ALTERNATIVE("call this_cpu_cmpxchg16b_emu",		\
 			      "cmpxchg16b " __percpu_arg([var]), X86_FEATURE_CX16) \
-		  : [var] "+m" (__my_cpu_var(_var)),			\
-		    "+a" (old__.low),					\
-		    "+d" (old__.high)					\
+		  : ALT_OUTPUT_SP([var] "+m" (__my_cpu_var(_var)),	\
+				  "+a" (old__.low),			\
+				  "+d" (old__.high))			\
 		  : "b" (new__.low),					\
 		    "c" (new__.high),					\
 		    "S" (&(_var))					\
@@ -452,10 +452,10 @@  do {									\
 	asm qual (ALTERNATIVE("call this_cpu_cmpxchg16b_emu",		\
 			      "cmpxchg16b " __percpu_arg([var]), X86_FEATURE_CX16) \
 		  CC_SET(z)						\
-		  : CC_OUT(z) (success),				\
-		    [var] "+m" (__my_cpu_var(_var)),			\
-		    "+a" (old__.low),					\
-		    "+d" (old__.high)					\
+		  : ALT_OUTPUT_SP(CC_OUT(z) (success),			\
+				  [var] "+m" (__my_cpu_var(_var)),	\
+				  "+a" (old__.low),			\
+				  "+d" (old__.high))			\
 		  : "b" (new__.low),					\
 		    "c" (new__.high),					\
 		    "S" (&(_var))					\