linux-kernel - [PATCH cmpxchg 02/14] sparc32: make the first argument of __cmpxchg

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Date: Mon,  8 Apr 2024 10:49:32 -0700
From: "Paul E. McKenney" <paulmck@...nel.org>
To: linux-arch@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: elver@...gle.com,
	akpm@...ux-foundation.org,
	tglx@...utronix.de,
	peterz@...radead.org,
	dianders@...omium.org,
	pmladek@...e.com,
	torvalds@...ux-foundation.org,
	Arnd Bergmann <arnd@...db.de>,
	Al Viro <viro@...iv.linux.org.uk>,
	"Paul E . McKenney" <paulmck@...nel.org>
Subject: [PATCH cmpxchg 02/14] sparc32: make the first argument of __cmpxchg_u64() volatile u64 *

From: Al Viro <viro@...iv.linux.org.uk>

.. to match all cmpxchg variants.

Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
Signed-off-by: Paul E. McKenney <paulmck@...nel.org>
---
 arch/sparc/include/asm/cmpxchg_32.h | 2 +-
 arch/sparc/lib/atomic32.c           | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/sparc/include/asm/cmpxchg_32.h b/arch/sparc/include/asm/cmpxchg_32.h
index 2a05cb236480c..05d5f86a56dc2 100644
--- a/arch/sparc/include/asm/cmpxchg_32.h
+++ b/arch/sparc/include/asm/cmpxchg_32.h
@@ -63,7 +63,7 @@ __cmpxchg(volatile void *ptr, unsigned long old, unsigned long new_, int size)
 			(unsigned long)_n_, sizeof(*(ptr)));		\
 })
 
-u64 __cmpxchg_u64(u64 *ptr, u64 old, u64 new);
+u64 __cmpxchg_u64(volatile u64 *ptr, u64 old, u64 new);
 #define arch_cmpxchg64(ptr, old, new)	__cmpxchg_u64(ptr, old, new)
 
 #include <asm-generic/cmpxchg-local.h>
diff --git a/arch/sparc/lib/atomic32.c b/arch/sparc/lib/atomic32.c
index d90d756123d81..e15affbbb5238 100644
--- a/arch/sparc/lib/atomic32.c
+++ b/arch/sparc/lib/atomic32.c
@@ -173,7 +173,7 @@ u32 __cmpxchg_u32(volatile u32 *ptr, u32 old, u32 new)
 }
 EXPORT_SYMBOL(__cmpxchg_u32);
 
-u64 __cmpxchg_u64(u64 *ptr, u64 old, u64 new)
+u64 __cmpxchg_u64(volatile u64 *ptr, u64 old, u64 new)
 {
 	unsigned long flags;
 	u64 prev;
-- 
2.40.1