The patch titled
m68knommu: avoid unneccessary use of xchg() in set_mb()
has been removed from the -mm tree. Its filename was
m68knommu-avoid-unneccessary-use-of-xchg-in-set_mb.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: m68knommu: avoid unneccessary use of xchg() in set_mb()
From: Greg Ungerer <gerg@xxxxxxxxxxxx>
Avoid unneccessary use of xchg() in set_mb().
Signed-off-by: Greg Ungerer <gerg@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/asm-m68knommu/system.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN include/asm-m68knommu/system.h~m68knommu-avoid-unneccessary-use-of-xchg-in-set_mb include/asm-m68knommu/system.h
--- a/include/asm-m68knommu/system.h~m68knommu-avoid-unneccessary-use-of-xchg-in-set_mb
+++ a/include/asm-m68knommu/system.h
@@ -104,7 +104,7 @@ asmlinkage void resume(void);
#define mb() asm volatile ("" : : :"memory")
#define rmb() asm volatile ("" : : :"memory")
#define wmb() asm volatile ("" : : :"memory")
-#define set_mb(var, value) do { xchg(&var, value); } while (0)
+#define set_mb(var, value) ({ (var) = (value); wmb(); })
#ifdef CONFIG_SMP
#define smp_mb() mb()
_
Patches currently in -mm which might be from gerg@xxxxxxxxxxxx are
origin.patch
-
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