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authorMathieu Desnoyers <mathieu.desnoyers@polymtl.ca>2008-02-07 00:16:11 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-07 08:42:31 -0800
commit176393d4232a89aaf8745b0726f4d212a20103f1 (patch)
treef5d64f19a7db6da5d694c209fa8ac2d6ce43dd29 /include/asm-arm/system.h
parent32f49eab5e893007c0064f465c857ac7c4d40b77 (diff)
Add cmpxchg_local to arm
Use the new generic cmpxchg_local (disables interrupt). Also use the generic cmpxchg as fallback if SMP is not set. Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/asm-arm/system.h')
-rw-r--r--include/asm-arm/system.h15
1 files changed, 15 insertions, 0 deletions
diff --git a/include/asm-arm/system.h b/include/asm-arm/system.h
index 28425c473e7..6335de9a2bb 100644
--- a/include/asm-arm/system.h
+++ b/include/asm-arm/system.h
@@ -363,6 +363,21 @@ static inline unsigned long __xchg(unsigned long x, volatile void *ptr, int size
extern void disable_hlt(void);
extern void enable_hlt(void);
+#include <asm-generic/cmpxchg-local.h>
+
+/*
+ * cmpxchg_local and cmpxchg64_local are atomic wrt current CPU. Always make
+ * them available.
+ */
+#define cmpxchg_local(ptr, o, n) \
+ ((__typeof__(*(ptr)))__cmpxchg_local_generic((ptr), (unsigned long)(o),\
+ (unsigned long)(n), sizeof(*(ptr))))
+#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n))
+
+#ifndef CONFIG_SMP
+#include <asm-generic/cmpxchg.h>
+#endif
+
#endif /* __ASSEMBLY__ */
#define arch_align_stack(x) (x)