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arch,metag: Convert smp_mb__*()

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Implement the new barriers; as per the old versions the metag atomic
imply a full barrier.

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-dqnyo215kq38wi4xcxnbpjw3@git.kernel.org
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Will Deacon <will.deacon@arm.com>
Cc: linux-kernel@vger.kernel.org
Cc: linux-metag@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Peter Zijlstra 2014-03-13 19:00:36 +01:00 committed by Ingo Molnar
parent 2db56e8606
commit 40074dece6
3 changed files with 4 additions and 11 deletions
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6
arch/metag/include/asm/atomic.h
View File

@ -4,6 +4,7 @@
#include <linux/compiler.h>
#include <linux/types.h>
#include <asm/cmpxchg.h>
#include <asm/barrier.h>
#if defined(CONFIG_METAG_ATOMICITY_IRQSOFF)
/* The simple UP case. */
@ -39,11 +40,6 @@
#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
#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
#define atomic_dec_if_positive(v) atomic_sub_if_positive(1, v)

3
arch/metag/include/asm/barrier.h
View File

@ -97,4 +97,7 @@ do { \
___p1; \
})
#define smp_mb__before_atomic() barrier()
#define smp_mb__after_atomic() barrier()
#endif /* _ASM_METAG_BARRIER_H */

6
arch/metag/include/asm/bitops.h
View File

@ -5,12 +5,6 @@
#include <asm/barrier.h>
#include <asm/global_lock.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()
#ifdef CONFIG_SMP
/*
* These functions are the basis of our bit ops.