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read_barrier_depends arch fixlets

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read_barrie_depends has always been a noop (not a compiler barrier) on all
architectures except SMP alpha. This brings UP alpha and frv into line with all
other architectures, and fixes incorrect documentation.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Nick Piggin
2008-05-14 06:35:11 +02:00
committed by Linus Torvalds
parent 4ef7e3e90f
commit 73f10281ea
3 changed files with 13 additions and 3 deletions
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include/asm-alpha/barrier.h
+1 -1
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@@ -24,7 +24,7 @@ __asm__ __volatile__("mb": : :"memory")
#define smp_mb() barrier()
#define smp_rmb() barrier()
#define smp_wmb() barrier()
#define smp_read_barrier_depends() barrier()
#define smp_read_barrier_depends() do { } while (0)
#endif
#define set_mb(var, value) \