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authorLinus Torvalds <torvalds@linux-foundation.org>2011-03-15 21:28:30 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2011-03-15 21:28:30 -0400
commit0586bed3e8563c2eb89bc7256e30ce633ae06cfb (patch)
tree7a59610f45f7222f25b3212c53fa28636bb4427c /arch/powerpc/include/asm/rwsem.h
parentb80cd62b7d4406bbe8c573fe4381dcc71a2850fd (diff)
parentdbebbfbb1605f0179e7c0d900d941cc9c45de569 (diff)
Merge branch 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: rtmutex: tester: Remove the remaining BKL leftovers lockdep/timers: Explain in detail the locking problems del_timer_sync() may cause rtmutex: Simplify PI algorithm and make highest prio task get lock rwsem: Remove redundant asmregparm annotation rwsem: Move duplicate function prototypes to linux/rwsem.h rwsem: Unify the duplicate rwsem_is_locked() inlines rwsem: Move duplicate init macros and functions to linux/rwsem.h rwsem: Move duplicate struct rwsem declaration to linux/rwsem.h x86: Cleanup rwsem_count_t typedef rwsem: Cleanup includes locking: Remove deprecated lock initializers cred: Replace deprecated spinlock initialization kthread: Replace deprecated spinlock initialization xtensa: Replace deprecated spinlock initialization um: Replace deprecated spinlock initialization sparc: Replace deprecated spinlock initialization mips: Replace deprecated spinlock initialization cris: Replace deprecated spinlock initialization alpha: Replace deprecated spinlock initialization rtmutex-tester: Remove BKL tests
Diffstat (limited to 'arch/powerpc/include/asm/rwsem.h')
-rw-r--r--arch/powerpc/include/asm/rwsem.h51
1 files changed, 0 insertions, 51 deletions
diff --git a/arch/powerpc/include/asm/rwsem.h b/arch/powerpc/include/asm/rwsem.h
index 8447d89fbe72..bb1e2cdeb9bf 100644
--- a/arch/powerpc/include/asm/rwsem.h
+++ b/arch/powerpc/include/asm/rwsem.h
@@ -13,11 +13,6 @@
13 * by Paul Mackerras <paulus@samba.org>. 13 * by Paul Mackerras <paulus@samba.org>.
14 */ 14 */
15 15
16#include <linux/list.h>
17#include <linux/spinlock.h>
18#include <asm/atomic.h>
19#include <asm/system.h>
20
21/* 16/*
22 * the semaphore definition 17 * the semaphore definition
23 */ 18 */
@@ -33,47 +28,6 @@
33#define RWSEM_ACTIVE_READ_BIAS RWSEM_ACTIVE_BIAS 28#define RWSEM_ACTIVE_READ_BIAS RWSEM_ACTIVE_BIAS
34#define RWSEM_ACTIVE_WRITE_BIAS (RWSEM_WAITING_BIAS + RWSEM_ACTIVE_BIAS) 29#define RWSEM_ACTIVE_WRITE_BIAS (RWSEM_WAITING_BIAS + RWSEM_ACTIVE_BIAS)
35 30
36struct rw_semaphore {
37 long count;
38 spinlock_t wait_lock;
39 struct list_head wait_list;
40#ifdef CONFIG_DEBUG_LOCK_ALLOC
41 struct lockdep_map dep_map;
42#endif
43};
44
45#ifdef CONFIG_DEBUG_LOCK_ALLOC
46# define __RWSEM_DEP_MAP_INIT(lockname) , .dep_map = { .name = #lockname }
47#else
48# define __RWSEM_DEP_MAP_INIT(lockname)
49#endif
50
51#define __RWSEM_INITIALIZER(name) \
52{ \
53 RWSEM_UNLOCKED_VALUE, \
54 __SPIN_LOCK_UNLOCKED((name).wait_lock), \
55 LIST_HEAD_INIT((name).wait_list) \
56 __RWSEM_DEP_MAP_INIT(name) \
57}
58
59#define DECLARE_RWSEM(name) \
60 struct rw_semaphore name = __RWSEM_INITIALIZER(name)
61
62extern struct rw_semaphore *rwsem_down_read_failed(struct rw_semaphore *sem);
63extern struct rw_semaphore *rwsem_down_write_failed(struct rw_semaphore *sem);
64extern struct rw_semaphore *rwsem_wake(struct rw_semaphore *sem);
65extern struct rw_semaphore *rwsem_downgrade_wake(struct rw_semaphore *sem);
66
67extern void __init_rwsem(struct rw_semaphore *sem, const char *name,
68 struct lock_class_key *key);
69
70#define init_rwsem(sem) \
71 do { \
72 static struct lock_class_key __key; \
73 \
74 __init_rwsem((sem), #sem, &__key); \
75 } while (0)
76
77/* 31/*
78 * lock for reading 32 * lock for reading
79 */ 33 */
@@ -174,10 +128,5 @@ static inline long rwsem_atomic_update(long delta, struct rw_semaphore *sem)
174 return atomic_long_add_return(delta, (atomic_long_t *)&sem->count); 128 return atomic_long_add_return(delta, (atomic_long_t *)&sem->count);
175} 129}
176 130
177static inline int rwsem_is_locked(struct rw_semaphore *sem)
178{
179 return sem->count != 0;
180}
181
182#endif /* __KERNEL__ */ 131#endif /* __KERNEL__ */
183#endif /* _ASM_POWERPC_RWSEM_H */ 132#endif /* _ASM_POWERPC_RWSEM_H */