diff options
Diffstat (limited to 'include/linux/rwsem-spinlock.h')
-rw-r--r-- | include/linux/rwsem-spinlock.h | 47 |
1 files changed, 0 insertions, 47 deletions
diff --git a/include/linux/rwsem-spinlock.h b/include/linux/rwsem-spinlock.h deleted file mode 100644 index e47568363e5e..000000000000 --- a/include/linux/rwsem-spinlock.h +++ /dev/null | |||
@@ -1,47 +0,0 @@ | |||
1 | /* SPDX-License-Identifier: GPL-2.0 */ | ||
2 | /* rwsem-spinlock.h: fallback C implementation | ||
3 | * | ||
4 | * Copyright (c) 2001 David Howells (dhowells@redhat.com). | ||
5 | * - Derived partially from ideas by Andrea Arcangeli <andrea@suse.de> | ||
6 | * - Derived also from comments by Linus | ||
7 | */ | ||
8 | |||
9 | #ifndef _LINUX_RWSEM_SPINLOCK_H | ||
10 | #define _LINUX_RWSEM_SPINLOCK_H | ||
11 | |||
12 | #ifndef _LINUX_RWSEM_H | ||
13 | #error "please don't include linux/rwsem-spinlock.h directly, use linux/rwsem.h instead" | ||
14 | #endif | ||
15 | |||
16 | #ifdef __KERNEL__ | ||
17 | /* | ||
18 | * the rw-semaphore definition | ||
19 | * - if count is 0 then there are no active readers or writers | ||
20 | * - if count is +ve then that is the number of active readers | ||
21 | * - if count is -1 then there is one active writer | ||
22 | * - if wait_list is not empty, then there are processes waiting for the semaphore | ||
23 | */ | ||
24 | struct rw_semaphore { | ||
25 | __s32 count; | ||
26 | raw_spinlock_t wait_lock; | ||
27 | struct list_head wait_list; | ||
28 | #ifdef CONFIG_DEBUG_LOCK_ALLOC | ||
29 | struct lockdep_map dep_map; | ||
30 | #endif | ||
31 | }; | ||
32 | |||
33 | #define RWSEM_UNLOCKED_VALUE 0x00000000 | ||
34 | |||
35 | extern void __down_read(struct rw_semaphore *sem); | ||
36 | extern int __must_check __down_read_killable(struct rw_semaphore *sem); | ||
37 | extern int __down_read_trylock(struct rw_semaphore *sem); | ||
38 | extern void __down_write(struct rw_semaphore *sem); | ||
39 | extern int __must_check __down_write_killable(struct rw_semaphore *sem); | ||
40 | extern int __down_write_trylock(struct rw_semaphore *sem); | ||
41 | extern void __up_read(struct rw_semaphore *sem); | ||
42 | extern void __up_write(struct rw_semaphore *sem); | ||
43 | extern void __downgrade_write(struct rw_semaphore *sem); | ||
44 | extern int rwsem_is_locked(struct rw_semaphore *sem); | ||
45 | |||
46 | #endif /* __KERNEL__ */ | ||
47 | #endif /* _LINUX_RWSEM_SPINLOCK_H */ | ||