Make sure that at least cmpxchg64_local is available on all architectures to use
for unsigned long long values.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
CC: ralf@linux-mips.org
CC linux-mips@linux-mips.org
---
include/asm-mips/cmpxchg.h | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
Index: linux-2.6-lttng/include/asm-mips/cmpxchg.h
===================================================================
--- linux-2.6-lttng.orig/include/asm-mips/cmpxchg.h 2007-10-31 17:32:44.000000000 -0400
+++ linux-2.6-lttng/include/asm-mips/cmpxchg.h 2007-10-31 17:54:49.000000000 -0400
@@ -104,4 +104,21 @@ extern void __cmpxchg_called_with_bad_po
#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 */
--
Mathieu Desnoyers
Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68
-
