locking/atomic: mips: move to ARCH_ATOMIC

We'd like all architectures to convert to ARCH_ATOMIC, as once all
architectures are converted it will be possible to make significant
cleanups to the atomics headers, and this will make it much easier to
generically enable atomic functionality (e.g. debug logic in the
instrumented wrappers).

As a step towards that, this patch migrates mips to ARCH_ATOMIC. The
arch code provides arch_{atomic,atomic64,xchg,cmpxchg}*(), and common
code wraps these with optional instrumentation to provide the regular
functions.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210525140232.53872-23-mark.rutland@arm.com

1 files changed, 11 insertions, 11 deletions

diff --git a/arch/mips/include/asm/cmpxchg.h b/arch/mips/include/asm/cmpxchg.h
index c7e0455d4d46..0b983800f48b 100644
--- a/arch/mips/include/asm/cmpxchg.h
+++ b/arch/mips/include/asm/cmpxchg.h
@@ -90,7 +90,7 @@ unsigned long __xchg(volatile void *ptr, unsigned long x, int size)
 	}
 }
 
-#define xchg(ptr, x)							\
+#define arch_xchg(ptr, x)						\
 ({									\
 	__typeof__(*(ptr)) __res;					\
 									\
@@ -175,14 +175,14 @@ unsigned long __cmpxchg(volatile void *ptr, unsigned long old,
 	}
 }
 
-#define cmpxchg_local(ptr, old, new)					\
+#define arch_cmpxchg_local(ptr, old, new)				\
 	((__typeof__(*(ptr)))						\
 		__cmpxchg((ptr),					\
 			  (unsigned long)(__typeof__(*(ptr)))(old),	\
 			  (unsigned long)(__typeof__(*(ptr)))(new),	\
 			  sizeof(*(ptr))))
 
-#define cmpxchg(ptr, old, new)						\
+#define arch_cmpxchg(ptr, old, new)					\
 ({									\
 	__typeof__(*(ptr)) __res;					\
 									\
@@ -194,7 +194,7 @@ unsigned long __cmpxchg(volatile void *ptr, unsigned long old,
 	if (__SYNC_loongson3_war == 0)					\
 		smp_mb__before_llsc();					\
 									\
-	__res = cmpxchg_local((ptr), (old), (new));			\
+	__res = arch_cmpxchg_local((ptr), (old), (new));		\
 									\
 	/*								\
 	 * In the Loongson3 workaround case __cmpxchg_asm() already	\
@@ -208,21 +208,21 @@ unsigned long __cmpxchg(volatile void *ptr, unsigned long old,
 })
 
 #ifdef CONFIG_64BIT
-#define cmpxchg64_local(ptr, o, n)					\
+#define arch_cmpxchg64_local(ptr, o, n)					\
   ({									\
 	BUILD_BUG_ON(sizeof(*(ptr)) != 8);				\
-	cmpxchg_local((ptr), (o), (n));					\
+	arch_cmpxchg_local((ptr), (o), (n));				\
   })
 
-#define cmpxchg64(ptr, o, n)						\
+#define arch_cmpxchg64(ptr, o, n)					\
   ({									\
 	BUILD_BUG_ON(sizeof(*(ptr)) != 8);				\
-	cmpxchg((ptr), (o), (n));					\
+	arch_cmpxchg((ptr), (o), (n));					\
   })
 #else
 
 # include <asm-generic/cmpxchg-local.h>
-# define cmpxchg64_local(ptr, o, n) __generic_cmpxchg64_local((ptr), (o), (n))
+# define arch_cmpxchg64_local(ptr, o, n) __generic_cmpxchg64_local((ptr), (o), (n))
 
 # ifdef CONFIG_SMP
 
@@ -294,7 +294,7 @@ static inline unsigned long __cmpxchg64(volatile void *ptr,
 	return ret;
 }
 
-#  define cmpxchg64(ptr, o, n) ({					\
+#  define arch_cmpxchg64(ptr, o, n) ({					\
 	unsigned long long __old = (__typeof__(*(ptr)))(o);		\
 	unsigned long long __new = (__typeof__(*(ptr)))(n);		\
 	__typeof__(*(ptr)) __res;					\
@@ -317,7 +317,7 @@ static inline unsigned long __cmpxchg64(volatile void *ptr,
 })
 
 # else /* !CONFIG_SMP */
-#  define cmpxchg64(ptr, o, n) cmpxchg64_local((ptr), (o), (n))
+#  define arch_cmpxchg64(ptr, o, n) arch_cmpxchg64_local((ptr), (o), (n))
 # endif /* !CONFIG_SMP */
 #endif /* !CONFIG_64BIT */