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authorPeter Zijlstra <peterz@infradead.org>2014-03-13 19:00:36 +0100
committerIngo Molnar <mingo@kernel.org>2014-04-18 14:20:38 +0200
commit40074dece684fc61ab72cfc1689d564cba1c5f64 (patch)
treeeb37370f63886527763387fb675f556e399cf107
parent2db56e8606016e33903c64feaed989ffecd66a1b (diff)
downloadlinux-40074dece684fc61ab72cfc1689d564cba1c5f64.tar.gz
arch,metag: Convert smp_mb__*()
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>
-rw-r--r--arch/metag/include/asm/atomic.h6
-rw-r--r--arch/metag/include/asm/barrier.h3
-rw-r--r--arch/metag/include/asm/bitops.h6
3 files changed, 4 insertions, 11 deletions
diff --git a/arch/metag/include/asm/atomic.h b/arch/metag/include/asm/atomic.h
index 307ecd2bd9a..470e365f04e 100644
--- a/arch/metag/include/asm/atomic.h
+++ b/arch/metag/include/asm/atomic.h
@@ -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)
diff --git a/arch/metag/include/asm/barrier.h b/arch/metag/include/asm/barrier.h
index 5d6b4b407dd..d1768c6f5b1 100644
--- a/arch/metag/include/asm/barrier.h
+++ b/arch/metag/include/asm/barrier.h
@@ -97,4 +97,7 @@ do { \
___p1; \
})
+#define smp_mb__before_atomic() barrier()
+#define smp_mb__after_atomic() barrier()
+
#endif /* _ASM_METAG_BARRIER_H */
diff --git a/arch/metag/include/asm/bitops.h b/arch/metag/include/asm/bitops.h
index c0d0df0d137..2671134ee74 100644
--- a/arch/metag/include/asm/bitops.h
+++ b/arch/metag/include/asm/bitops.h
@@ -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.