Add cmpxchg64 and cmpxchg64_local to mips

[linux-2.6-omap-h63xx.git] / include / asm-mips / cmpxchg.h

diff --git a/include/asm-mips/cmpxchg.h b/include/asm-mips/cmpxchg.h
index a5ec0e5dc5b8ec303addaef2fe5fb52f0c9d5670..4a812c3ceb90f3b4781a6ead62d018639a66c0f4 100644 (file)
--- a/include/asm-mips/cmpxchg.h
+++ b/include/asm-mips/cmpxchg.h
@@ -104,4 +104,21 @@ extern void __cmpxchg_called_with_bad_pointer(void);
 #define cmpxchg(ptr, old, new)         __cmpxchg(ptr, old, new, smp_llsc_mb())
 #define cmpxchg_local(ptr, old, new)   __cmpxchg(ptr, old, new, )
 
+#define cmpxchg64(ptr, o, n)                                           \
+  ({                                                                   \
+       BUILD_BUG_ON(sizeof(*(ptr)) != 8);                              \
+       cmpxchg((ptr), (o), (n));                                       \
+  })
+
+#ifdef CONFIG_64BIT
+#define cmpxchg64_local(ptr, o, n)                                     \
+  ({                                                                   \
+       BUILD_BUG_ON(sizeof(*(ptr)) != 8);                              \
+       cmpxchg_local((ptr), (o), (n));                                 \
+  })
+#else
+#include <asm-generic/cmpxchg-local.h>
+#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n))
+#endif
+
 #endif /* __ASM_CMPXCHG_H */