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authorHeiko Carstens <heiko.carstens@de.ibm.com>2007-08-22 07:51:45 -0400
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2007-08-22 07:51:49 -0400
commitc51b9621796c31810fb66509ea1faee4597d9c03 (patch)
tree777019f91c931e3d4b8eb06161b19511e0a54af8 /include
parent9c5f225f1a2c67c57ff5dfbe0589de20c5706a16 (diff)
[S390] Change atomic_read/set to inline functions with barrier semantics.
After doing some tests this seems to be the best variant for s390 and should be correct as well. With gcc 4.2.1 we get the following kernel image sizes using the default configuration: atomic_t type volatile, atomic_read/set defines 5311824 bytes atomic_t type int, atomic_read/set defines 5270864 bytes atomic_t type int, atomic_read/set inline asm 5279056 bytes atomic_t type int, atomic_read/set inline barrier 5270864 bytes Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'include')
-rw-r--r--include/asm-s390/atomic.h26
1 files changed, 22 insertions, 4 deletions
diff --git a/include/asm-s390/atomic.h b/include/asm-s390/atomic.h
index ea486952f778..2d184655bc5d 100644
--- a/include/asm-s390/atomic.h
+++ b/include/asm-s390/atomic.h
@@ -67,8 +67,17 @@ typedef struct {
67 67
68#endif /* __GNUC__ */ 68#endif /* __GNUC__ */
69 69
70#define atomic_read(v) ((v)->counter) 70static inline int atomic_read(const atomic_t *v)
71#define atomic_set(v,i) (((v)->counter) = (i)) 71{
72 barrier();
73 return v->counter;
74}
75
76static inline void atomic_set(atomic_t *v, int i)
77{
78 v->counter = i;
79 barrier();
80}
72 81
73static __inline__ int atomic_add_return(int i, atomic_t * v) 82static __inline__ int atomic_add_return(int i, atomic_t * v)
74{ 83{
@@ -182,8 +191,17 @@ typedef struct {
182 191
183#endif /* __GNUC__ */ 192#endif /* __GNUC__ */
184 193
185#define atomic64_read(v) ((v)->counter) 194static inline long long atomic64_read(const atomic64_t *v)
186#define atomic64_set(v,i) (((v)->counter) = (i)) 195{
196 barrier();
197 return v->counter;
198}
199
200static inline void atomic64_set(atomic64_t *v, long long i)
201{
202 v->counter = i;
203 barrier();
204}
187 205
188static __inline__ long long atomic64_add_return(long long i, atomic64_t * v) 206static __inline__ long long atomic64_add_return(long long i, atomic64_t * v)
189{ 207{