1 files changed, 6 insertions, 0 deletions

diff --git a/arch/tile/include/asm/cmpxchg.h b/arch/tile/include/asm/cmpxchg.h
index 276f067e3640..1da5bfbd8c61 100644
--- a/arch/tile/include/asm/cmpxchg.h
+++ b/arch/tile/include/asm/cmpxchg.h
@@ -68,6 +68,12 @@ extern unsigned long __cmpxchg_called_with_bad_pointer(void);
 
 #define tas(ptr) (xchg((ptr), 1))
 
+#define cmpxchg64(ptr, o, n)                                            \
+({                                                                      \
+        BUILD_BUG_ON(sizeof(*(ptr)) != 8);                              \
+        cmpxchg((ptr), (o), (n));                                       \
+})
+
 #endif /* __ASSEMBLY__ */
 
 #endif /* _ASM_TILE_CMPXCHG_H */