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62ac665f MP |
1 | #ifndef _LINUX_PERCPU_RWSEM_H |
2 | #define _LINUX_PERCPU_RWSEM_H | |
3 | ||
9390ef0c | 4 | #include <linux/atomic.h> |
a1fd3e24 | 5 | #include <linux/rwsem.h> |
62ac665f | 6 | #include <linux/percpu.h> |
a1fd3e24 | 7 | #include <linux/wait.h> |
62ac665f MP |
8 | |
9 | struct percpu_rw_semaphore { | |
a1fd3e24 | 10 | unsigned int __percpu *fast_read_ctr; |
9390ef0c | 11 | atomic_t write_ctr; |
a1fd3e24 ON |
12 | struct rw_semaphore rw_sem; |
13 | atomic_t slow_read_ctr; | |
14 | wait_queue_head_t write_waitq; | |
62ac665f MP |
15 | }; |
16 | ||
a1fd3e24 ON |
17 | extern void percpu_down_read(struct percpu_rw_semaphore *); |
18 | extern void percpu_up_read(struct percpu_rw_semaphore *); | |
5c1eabe6 | 19 | |
a1fd3e24 ON |
20 | extern void percpu_down_write(struct percpu_rw_semaphore *); |
21 | extern void percpu_up_write(struct percpu_rw_semaphore *); | |
62ac665f | 22 | |
a1fd3e24 ON |
23 | extern int percpu_init_rwsem(struct percpu_rw_semaphore *); |
24 | extern void percpu_free_rwsem(struct percpu_rw_semaphore *); | |
62ac665f MP |
25 | |
26 | #endif |