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authorNick Piggin <npiggin@suse.de>2008-05-14 06:35:11 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2008-05-14 10:05:18 -0700
commit73f10281ea96d7e8b4fc1c5d755a7c8eb484155b (patch)
treed75ab7ba0f571ce0c08d30a04f1da7c781b02092 /include
parent4ef7e3e90f56c74b2a17e12d49ed35c3767d66c2 (diff)
downloadop-kernel-dev-73f10281ea96d7e8b4fc1c5d755a7c8eb484155b.zip
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read_barrier_depends arch fixlets
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>
Diffstat (limited to 'include')
-rw-r--r--include/asm-alpha/barrier.h2
-rw-r--r--include/asm-frv/system.h2
2 files changed, 2 insertions, 2 deletions
diff --git a/include/asm-alpha/barrier.h b/include/asm-alpha/barrier.h
index 384dc08d..ac78eba 100644
--- a/include/asm-alpha/barrier.h
+++ b/include/asm-alpha/barrier.h
@@ -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) \
diff --git a/include/asm-frv/system.h b/include/asm-frv/system.h
index cb307f8..d3a12a9 100644
--- a/include/asm-frv/system.h
+++ b/include/asm-frv/system.h
@@ -179,7 +179,7 @@ do { \
#define mb() asm volatile ("membar" : : :"memory")
#define rmb() asm volatile ("membar" : : :"memory")
#define wmb() asm volatile ("membar" : : :"memory")
-#define read_barrier_depends() barrier()
+#define read_barrier_depends() do { } while (0)
#ifdef CONFIG_SMP
#define smp_mb() mb()
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