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Commit 40074dec authored by Peter Zijlstra's avatar Peter Zijlstra Committed by Ingo Molnar
Browse files

arch,metag: Convert smp_mb__*() 



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

Signed-off-by: default avatarPeter Zijlstra <peterz@infradead.org>
Acked-by: default avatarPaul 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: default avatarIngo Molnar <mingo@kernel.org>
parent 2db56e86

arch/metag/include/asm/atomic.h

+1 −5
Original line number Diff line number Diff line
@@ -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)

arch/metag/include/asm/barrier.h

+3 −0
Original line number Diff line number Diff line
@@ -97,4 +97,7 @@ do { \ 
	___p1;								\

})



#define smp_mb__before_atomic()	barrier()

#define smp_mb__after_atomic()	barrier()



#endif /* _ASM_METAG_BARRIER_H */

arch/metag/include/asm/bitops.h

+0 −6
Original line number Diff line number Diff line
@@ -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.