| | 1 | #ifndef _LINUX_PERCPU_RWSEM_H |
| | 2 | #define _LINUX_PERCPU_RWSEM_H |
| | 3 | |
| | 4 | #include <linux/atomic.h> |
| | 5 | #include <linux/rwsem.h> |
| | 6 | #include <linux/percpu.h> |
| | 7 | #include <linux/wait.h> |
| | 8 | #include <linux/lockdep.h> |
| | 9 | |
| | 10 | struct percpu_rw_semaphore { |
| | 11 | unsigned int __percpu *fast_read_ctr; |
| | 12 | atomic_t write_ctr; |
| | 13 | struct rw_semaphore rw_sem; |
| | 14 | atomic_t slow_read_ctr; |
| | 15 | wait_queue_head_t write_waitq; |
| | 16 | }; |
| | 17 | |
| | 18 | extern void percpu_down_read(struct percpu_rw_semaphore *); |
| | 19 | extern void percpu_up_read(struct percpu_rw_semaphore *); |
| | 20 | |
| | 21 | extern void percpu_down_write(struct percpu_rw_semaphore *); |
| | 22 | extern void percpu_up_write(struct percpu_rw_semaphore *); |
| | 23 | |
| | 24 | extern int __percpu_init_rwsem(struct percpu_rw_semaphore *, |
| | 25 | const char *, struct lock_class_key *); |
| | 26 | extern void percpu_free_rwsem(struct percpu_rw_semaphore *); |
| | 27 | |
| | 28 | #define percpu_init_rwsem(brw) \ |
| | 29 | ({ \ |
| | 30 | static struct lock_class_key rwsem_key; \ |
| | 31 | __percpu_init_rwsem(brw, #brw, &rwsem_key); \ |
| | 32 | }) |
| | 33 | |
| | 34 | #endif |
projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame_incremental