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authorMathieu Desnoyers <mathieu.desnoyers@polymtl.ca>2008-02-07 00:16:26 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-07 08:42:33 -0800
commitb62f13439147210d5ad4bc40acee32b94c59f06d (patch)
treef5948b96ce938b4cd28b30dfd02731a1ec7dbc73
parent80af4eeb726f038eddc32826e4238feba5b1dfb4 (diff)
Add cmpxchg_local to v850
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: Miles Bader <miles.bader@necel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--include/asm-v850/system.h15
1 files changed, 15 insertions, 0 deletions
diff --git a/include/asm-v850/system.h b/include/asm-v850/system.h
index a34ddfafd561..7daf1fdee119 100644
--- a/include/asm-v850/system.h
+++ b/include/asm-v850/system.h
@@ -103,6 +103,21 @@ static inline unsigned long __xchg (unsigned long with,
return tmp;
}
+#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
+
#define arch_align_stack(x) (x)
#endif /* __V850_SYSTEM_H__ */