Merge branches 'pm-cpufreq' and 'pm-cpuidle'

[linux-2.6-microblaze.git] / include / linux / atomic-fallback.h

diff --git a/include/linux/atomic-fallback.h b/include/linux/atomic-fallback.h
index fd525c7..2a3f55d 100644 (file)
--- a/include/linux/atomic-fallback.h
+++ b/include/linux/atomic-fallback.h
@@ -9,9 +9,9 @@
 #include <linux/compiler.h>
 
 #ifndef xchg_relaxed
-#define xchg_relaxed           xchg
-#define xchg_acquire           xchg
-#define xchg_release           xchg
+#define xchg_acquire xchg
+#define xchg_release xchg
+#define xchg_relaxed xchg
 #else /* xchg_relaxed */
 
 #ifndef xchg_acquire
@@ -32,9 +32,9 @@
 #endif /* xchg_relaxed */
 
 #ifndef cmpxchg_relaxed
-#define cmpxchg_relaxed                cmpxchg
-#define cmpxchg_acquire                cmpxchg
-#define cmpxchg_release                cmpxchg
+#define cmpxchg_acquire cmpxchg
+#define cmpxchg_release cmpxchg
+#define cmpxchg_relaxed cmpxchg
 #else /* cmpxchg_relaxed */
 
 #ifndef cmpxchg_acquire
@@ -55,9 +55,9 @@
 #endif /* cmpxchg_relaxed */
 
 #ifndef cmpxchg64_relaxed
-#define cmpxchg64_relaxed              cmpxchg64
-#define cmpxchg64_acquire              cmpxchg64
-#define cmpxchg64_release              cmpxchg64
+#define cmpxchg64_acquire cmpxchg64
+#define cmpxchg64_release cmpxchg64
+#define cmpxchg64_relaxed cmpxchg64
 #else /* cmpxchg64_relaxed */
 
 #ifndef cmpxchg64_acquire
@@ -77,6 +77,76 @@
 
 #endif /* cmpxchg64_relaxed */
 
+#ifndef try_cmpxchg_relaxed
+#ifdef try_cmpxchg
+#define try_cmpxchg_acquire try_cmpxchg
+#define try_cmpxchg_release try_cmpxchg
+#define try_cmpxchg_relaxed try_cmpxchg
+#endif /* try_cmpxchg */
+
+#ifndef try_cmpxchg
+#define try_cmpxchg(_ptr, _oldp, _new) \
+({ \
+       typeof(*(_ptr)) *___op = (_oldp), ___o = *___op, ___r; \
+       ___r = cmpxchg((_ptr), ___o, (_new)); \
+       if (unlikely(___r != ___o)) \
+               *___op = ___r; \
+       likely(___r == ___o); \
+})
+#endif /* try_cmpxchg */
+
+#ifndef try_cmpxchg_acquire
+#define try_cmpxchg_acquire(_ptr, _oldp, _new) \
+({ \
+       typeof(*(_ptr)) *___op = (_oldp), ___o = *___op, ___r; \
+       ___r = cmpxchg_acquire((_ptr), ___o, (_new)); \
+       if (unlikely(___r != ___o)) \
+               *___op = ___r; \
+       likely(___r == ___o); \
+})
+#endif /* try_cmpxchg_acquire */
+
+#ifndef try_cmpxchg_release
+#define try_cmpxchg_release(_ptr, _oldp, _new) \
+({ \
+       typeof(*(_ptr)) *___op = (_oldp), ___o = *___op, ___r; \
+       ___r = cmpxchg_release((_ptr), ___o, (_new)); \
+       if (unlikely(___r != ___o)) \
+               *___op = ___r; \
+       likely(___r == ___o); \
+})
+#endif /* try_cmpxchg_release */
+
+#ifndef try_cmpxchg_relaxed
+#define try_cmpxchg_relaxed(_ptr, _oldp, _new) \
+({ \
+       typeof(*(_ptr)) *___op = (_oldp), ___o = *___op, ___r; \
+       ___r = cmpxchg_relaxed((_ptr), ___o, (_new)); \
+       if (unlikely(___r != ___o)) \
+               *___op = ___r; \
+       likely(___r == ___o); \
+})
+#endif /* try_cmpxchg_relaxed */
+
+#else /* try_cmpxchg_relaxed */
+
+#ifndef try_cmpxchg_acquire
+#define try_cmpxchg_acquire(...) \
+       __atomic_op_acquire(try_cmpxchg, __VA_ARGS__)
+#endif
+
+#ifndef try_cmpxchg_release
+#define try_cmpxchg_release(...) \
+       __atomic_op_release(try_cmpxchg, __VA_ARGS__)
+#endif
+
+#ifndef try_cmpxchg
+#define try_cmpxchg(...) \
+       __atomic_op_fence(try_cmpxchg, __VA_ARGS__)
+#endif
+
+#endif /* try_cmpxchg_relaxed */
+
 #define arch_atomic_read atomic_read
 #define arch_atomic_read_acquire atomic_read_acquire
 
@@ -2522,4 +2592,4 @@ atomic64_dec_if_positive(atomic64_t *v)
 #endif
 
 #endif /* _LINUX_ATOMIC_FALLBACK_H */
-// 9d95b56f98d82a2a26c7b79ccdd0c47572d50a6f
+// d78e6c293c661c15188f0ec05bce45188c8d5892