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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/sparc
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/sparc')
-rw-r--r--arch/sparc/include/asm/rwsem.h46
-rw-r--r--arch/sparc/lib/atomic32.c2
2 files changed, 1 insertions, 47 deletions
diff --git a/arch/sparc/include/asm/rwsem.h b/arch/sparc/include/asm/rwsem.h
index a2b4302869bc..069bf4d663a1 100644
--- a/arch/sparc/include/asm/rwsem.h
+++ b/arch/sparc/include/asm/rwsem.h
@@ -13,53 +13,12 @@
13 13
14#ifdef __KERNEL__ 14#ifdef __KERNEL__
15 15
16#include <linux/list.h>
17#include <linux/spinlock.h>
18
19struct rwsem_waiter;
20
21struct rw_semaphore {
22 signed long count;
23#define RWSEM_UNLOCKED_VALUE 0x00000000L 16#define RWSEM_UNLOCKED_VALUE 0x00000000L
24#define RWSEM_ACTIVE_BIAS 0x00000001L 17#define RWSEM_ACTIVE_BIAS 0x00000001L
25#define RWSEM_ACTIVE_MASK 0xffffffffL 18#define RWSEM_ACTIVE_MASK 0xffffffffL
26#define RWSEM_WAITING_BIAS (-RWSEM_ACTIVE_MASK-1) 19#define RWSEM_WAITING_BIAS (-RWSEM_ACTIVE_MASK-1)
27#define RWSEM_ACTIVE_READ_BIAS RWSEM_ACTIVE_BIAS 20#define RWSEM_ACTIVE_READ_BIAS RWSEM_ACTIVE_BIAS
28#define RWSEM_ACTIVE_WRITE_BIAS (RWSEM_WAITING_BIAS + RWSEM_ACTIVE_BIAS) 21#define RWSEM_ACTIVE_WRITE_BIAS (RWSEM_WAITING_BIAS + RWSEM_ACTIVE_BIAS)
29 spinlock_t wait_lock;
30 struct list_head wait_list;
31#ifdef CONFIG_DEBUG_LOCK_ALLOC
32 struct lockdep_map dep_map;
33#endif
34};
35
36#ifdef CONFIG_DEBUG_LOCK_ALLOC
37# define __RWSEM_DEP_MAP_INIT(lockname) , .dep_map = { .name = #lockname }
38#else
39# define __RWSEM_DEP_MAP_INIT(lockname)
40#endif
41
42#define __RWSEM_INITIALIZER(name) \
43{ RWSEM_UNLOCKED_VALUE, __SPIN_LOCK_UNLOCKED((name).wait_lock), \
44 LIST_HEAD_INIT((name).wait_list) __RWSEM_DEP_MAP_INIT(name) }
45
46#define DECLARE_RWSEM(name) \
47 struct rw_semaphore name = __RWSEM_INITIALIZER(name)
48
49extern struct rw_semaphore *rwsem_down_read_failed(struct rw_semaphore *sem);
50extern struct rw_semaphore *rwsem_down_write_failed(struct rw_semaphore *sem);
51extern struct rw_semaphore *rwsem_wake(struct rw_semaphore *sem);
52extern struct rw_semaphore *rwsem_downgrade_wake(struct rw_semaphore *sem);
53
54extern void __init_rwsem(struct rw_semaphore *sem, const char *name,
55 struct lock_class_key *key);
56
57#define init_rwsem(sem) \
58do { \
59 static struct lock_class_key __key; \
60 \
61 __init_rwsem((sem), #sem, &__key); \
62} while (0)
63 22
64/* 23/*
65 * lock for reading 24 * lock for reading
@@ -160,11 +119,6 @@ static inline long rwsem_atomic_update(long delta, struct rw_semaphore *sem)
160 return atomic64_add_return(delta, (atomic64_t *)(&sem->count)); 119 return atomic64_add_return(delta, (atomic64_t *)(&sem->count));
161} 120}
162 121
163static inline int rwsem_is_locked(struct rw_semaphore *sem)
164{
165 return (sem->count != 0);
166}
167
168#endif /* __KERNEL__ */ 122#endif /* __KERNEL__ */
169 123
170#endif /* _SPARC64_RWSEM_H */ 124#endif /* _SPARC64_RWSEM_H */
diff --git a/arch/sparc/lib/atomic32.c b/arch/sparc/lib/atomic32.c
index cbddeb38ffda..d3c7a12ad879 100644
--- a/arch/sparc/lib/atomic32.c
+++ b/arch/sparc/lib/atomic32.c
@@ -16,7 +16,7 @@
16#define ATOMIC_HASH(a) (&__atomic_hash[(((unsigned long)a)>>8) & (ATOMIC_HASH_SIZE-1)]) 16#define ATOMIC_HASH(a) (&__atomic_hash[(((unsigned long)a)>>8) & (ATOMIC_HASH_SIZE-1)])
17 17
18spinlock_t __atomic_hash[ATOMIC_HASH_SIZE] = { 18spinlock_t __atomic_hash[ATOMIC_HASH_SIZE] = {
19 [0 ... (ATOMIC_HASH_SIZE-1)] = SPIN_LOCK_UNLOCKED 19 [0 ... (ATOMIC_HASH_SIZE-1)] = __SPIN_LOCK_UNLOCKED(__atomic_hash)
20}; 20};
21 21
22#else /* SMP */ 22#else /* SMP */