diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-03-15 21:28:30 -0400 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-03-15 21:28:30 -0400 |
commit | 0586bed3e8563c2eb89bc7256e30ce633ae06cfb (patch) | |
tree | 7a59610f45f7222f25b3212c53fa28636bb4427c /arch/sh | |
parent | b80cd62b7d4406bbe8c573fe4381dcc71a2850fd (diff) | |
parent | dbebbfbb1605f0179e7c0d900d941cc9c45de569 (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/sh')
-rw-r--r-- | arch/sh/include/asm/rwsem.h | 56 |
1 files changed, 0 insertions, 56 deletions
diff --git a/arch/sh/include/asm/rwsem.h b/arch/sh/include/asm/rwsem.h index 06e2251a5e48..edab57265293 100644 --- a/arch/sh/include/asm/rwsem.h +++ b/arch/sh/include/asm/rwsem.h | |||
@@ -11,64 +11,13 @@ | |||
11 | #endif | 11 | #endif |
12 | 12 | ||
13 | #ifdef __KERNEL__ | 13 | #ifdef __KERNEL__ |
14 | #include <linux/list.h> | ||
15 | #include <linux/spinlock.h> | ||
16 | #include <asm/atomic.h> | ||
17 | #include <asm/system.h> | ||
18 | 14 | ||
19 | /* | ||
20 | * the semaphore definition | ||
21 | */ | ||
22 | struct rw_semaphore { | ||
23 | long count; | ||
24 | #define RWSEM_UNLOCKED_VALUE 0x00000000 | 15 | #define RWSEM_UNLOCKED_VALUE 0x00000000 |
25 | #define RWSEM_ACTIVE_BIAS 0x00000001 | 16 | #define RWSEM_ACTIVE_BIAS 0x00000001 |
26 | #define RWSEM_ACTIVE_MASK 0x0000ffff | 17 | #define RWSEM_ACTIVE_MASK 0x0000ffff |
27 | #define RWSEM_WAITING_BIAS (-0x00010000) | 18 | #define RWSEM_WAITING_BIAS (-0x00010000) |
28 | #define RWSEM_ACTIVE_READ_BIAS RWSEM_ACTIVE_BIAS | 19 | #define RWSEM_ACTIVE_READ_BIAS RWSEM_ACTIVE_BIAS |
29 | #define RWSEM_ACTIVE_WRITE_BIAS (RWSEM_WAITING_BIAS + RWSEM_ACTIVE_BIAS) | 20 | #define RWSEM_ACTIVE_WRITE_BIAS (RWSEM_WAITING_BIAS + RWSEM_ACTIVE_BIAS) |
30 | spinlock_t wait_lock; | ||
31 | struct list_head wait_list; | ||
32 | #ifdef CONFIG_DEBUG_LOCK_ALLOC | ||
33 | struct lockdep_map dep_map; | ||
34 | #endif | ||
35 | }; | ||
36 | |||
37 | #ifdef CONFIG_DEBUG_LOCK_ALLOC | ||
38 | # define __RWSEM_DEP_MAP_INIT(lockname) , .dep_map = { .name = #lockname } | ||
39 | #else | ||
40 | # define __RWSEM_DEP_MAP_INIT(lockname) | ||
41 | #endif | ||
42 | |||
43 | #define __RWSEM_INITIALIZER(name) \ | ||
44 | { RWSEM_UNLOCKED_VALUE, __SPIN_LOCK_UNLOCKED((name).wait_lock), \ | ||
45 | LIST_HEAD_INIT((name).wait_list) \ | ||
46 | __RWSEM_DEP_MAP_INIT(name) } | ||
47 | |||
48 | #define DECLARE_RWSEM(name) \ | ||
49 | struct rw_semaphore name = __RWSEM_INITIALIZER(name) | ||
50 | |||
51 | extern struct rw_semaphore *rwsem_down_read_failed(struct rw_semaphore *sem); | ||
52 | extern struct rw_semaphore *rwsem_down_write_failed(struct rw_semaphore *sem); | ||
53 | extern struct rw_semaphore *rwsem_wake(struct rw_semaphore *sem); | ||
54 | extern struct rw_semaphore *rwsem_downgrade_wake(struct rw_semaphore *sem); | ||
55 | |||
56 | extern void __init_rwsem(struct rw_semaphore *sem, const char *name, | ||
57 | struct lock_class_key *key); | ||
58 | |||
59 | #define init_rwsem(sem) \ | ||
60 | do { \ | ||
61 | static struct lock_class_key __key; \ | ||
62 | \ | ||
63 | __init_rwsem((sem), #sem, &__key); \ | ||
64 | } while (0) | ||
65 | |||
66 | static inline void init_rwsem(struct rw_semaphore *sem) | ||
67 | { | ||
68 | sem->count = RWSEM_UNLOCKED_VALUE; | ||
69 | spin_lock_init(&sem->wait_lock); | ||
70 | INIT_LIST_HEAD(&sem->wait_list); | ||
71 | } | ||
72 | 21 | ||
73 | /* | 22 | /* |
74 | * lock for reading | 23 | * lock for reading |
@@ -179,10 +128,5 @@ static inline int rwsem_atomic_update(int delta, struct rw_semaphore *sem) | |||
179 | return atomic_add_return(delta, (atomic_t *)(&sem->count)); | 128 | return atomic_add_return(delta, (atomic_t *)(&sem->count)); |
180 | } | 129 | } |
181 | 130 | ||
182 | static inline int rwsem_is_locked(struct rw_semaphore *sem) | ||
183 | { | ||
184 | return (sem->count != 0); | ||
185 | } | ||
186 | |||
187 | #endif /* __KERNEL__ */ | 131 | #endif /* __KERNEL__ */ |
188 | #endif /* _ASM_SH_RWSEM_H */ | 132 | #endif /* _ASM_SH_RWSEM_H */ |