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| author | Peter Zijlstra <peterz@infradead.org> | 2014-03-13 19:00:35 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2014-04-18 14:20:44 +0200 |
| commit | 56d3648948c202e8b89cd786a004c451a3eb264f (patch) | |
| tree | eac45e33ca2a33df0001c5162272ec0265e0daa8 /arch/sparc/include/asm/atomic_32.h | |
| parent | 603228bcb8da90f8f8a5cdd8de74178f6c3e7e13 (diff) | |
| download | linux-stable-56d3648948c202e8b89cd786a004c451a3eb264f.tar.gz linux-stable-56d3648948c202e8b89cd786a004c451a3eb264f.tar.bz2 linux-stable-56d3648948c202e8b89cd786a004c451a3eb264f.zip | |
arch,sparc: Convert smp_mb__*()
sparc32: fully relies on asm-generic/barrier.h and thus can use its
implementation.
sparc64: is strongly ordered and its atomic ops imply a full barrier,
implement the new primitives using barrier().
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: David S. Miller <davem@davemloft.net>
Link: http://lkml.kernel.org/n/tip-2cla9ubpd8chrntnm7e4zdt4@git.kernel.org
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Will Deacon <will.deacon@arm.com>
Cc: linux-kernel@vger.kernel.org
Cc: sparclinux@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/sparc/include/asm/atomic_32.h')
| -rw-r--r-- | arch/sparc/include/asm/atomic_32.h | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/arch/sparc/include/asm/atomic_32.h b/arch/sparc/include/asm/atomic_32.h index 905832aa9e9e..f08fe51b264d 100644 --- a/arch/sparc/include/asm/atomic_32.h +++ b/arch/sparc/include/asm/atomic_32.h @@ -14,6 +14,7 @@ #include <linux/types.h> #include <asm/cmpxchg.h> +#include <asm/barrier.h> #include <asm-generic/atomic64.h> @@ -52,10 +53,4 @@ extern void atomic_set(atomic_t *, int); #define atomic_dec_and_test(v) (atomic_dec_return(v) == 0) #define atomic_sub_and_test(i, v) (atomic_sub_return(i, v) == 0) -/* Atomic operations are already serializing */ -#define smp_mb__before_atomic_dec() barrier() -#define smp_mb__after_atomic_dec() barrier() -#define smp_mb__before_atomic_inc() barrier() -#define smp_mb__after_atomic_inc() barrier() - #endif /* !(__ARCH_SPARC_ATOMIC__) */ |