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authorPeter Zijlstra <peterz@infradead.org>2014-03-13 19:00:37 +0100
committerIngo Molnar <mingo@kernel.org>2014-04-18 11:40:33 +0200
commit710adaa913169d7183cdf0de41c2a349101ff615 (patch)
treedc28c888bb2e40c45bdbfa310d44aa7d90be0cea /arch/avr32
parent8715466b602729061394df18864ea64b97951589 (diff)
downloadlinux-710adaa913169d7183cdf0de41c2a349101ff615.tar.gz
arch,avr32: Convert smp_mb__*()
AVR32's mb() implementation is a compiler barrier(), therefore it all doesn't matter, fully rely on whatever asm-generic/barrier.h generates. Signed-off-by: Peter Zijlstra <peterz@infradead.org> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Link: http://lkml.kernel.org/n/tip-8gow97a7mapmnec0pvf729pj@git.kernel.org Cc: Haavard Skinnemoen <hskinnemoen@gmail.com> Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/avr32')
-rw-r--r--arch/avr32/include/asm/atomic.h5
-rw-r--r--arch/avr32/include/asm/bitops.h9
2 files changed, 2 insertions, 12 deletions
diff --git a/arch/avr32/include/asm/atomic.h b/arch/avr32/include/asm/atomic.h
index 61407279208..0780f3f2415 100644
--- a/arch/avr32/include/asm/atomic.h
+++ b/arch/avr32/include/asm/atomic.h
@@ -183,9 +183,4 @@ static inline int atomic_sub_if_positive(int i, atomic_t *v)
#define atomic_dec_if_positive(v) atomic_sub_if_positive(1, v)
-#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 /* __ASM_AVR32_ATOMIC_H */
diff --git a/arch/avr32/include/asm/bitops.h b/arch/avr32/include/asm/bitops.h
index ebe7ad3f490..910d5374ce5 100644
--- a/arch/avr32/include/asm/bitops.h
+++ b/arch/avr32/include/asm/bitops.h
@@ -13,12 +13,7 @@
#endif
#include <asm/byteorder.h>
-
-/*
- * clear_bit() doesn't provide any barrier for the compiler
- */
-#define smp_mb__before_clear_bit() barrier()
-#define smp_mb__after_clear_bit() barrier()
+#include <asm/barrier.h>
/*
* set_bit - Atomically set a bit in memory
@@ -67,7 +62,7 @@ static inline void set_bit(int nr, volatile void * addr)
*
* clear_bit() is atomic and may not be reordered. However, it does
* not contain a memory barrier, so if it is used for locking purposes,
- * you should call smp_mb__before_clear_bit() and/or smp_mb__after_clear_bit()
+ * you should call smp_mb__before_atomic() and/or smp_mb__after_atomic()
* in order to ensure changes are visible on other processors.
*/
static inline void clear_bit(int nr, volatile void * addr)