2012-09-26 07:46:43 +02:00
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#ifndef _LINUX_PERCPU_RWSEM_H
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#define _LINUX_PERCPU_RWSEM_H
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#include <linux/atomic.h>
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#include <linux/rwsem.h>
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2012-09-26 07:46:43 +02:00
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#include <linux/percpu.h>
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#include <linux/wait.h>
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2012-09-26 07:46:43 +02:00
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struct percpu_rw_semaphore {
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unsigned int __percpu *fast_read_ctr;
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atomic_t write_ctr;
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struct rw_semaphore rw_sem;
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atomic_t slow_read_ctr;
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wait_queue_head_t write_waitq;
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};
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extern void percpu_down_read(struct percpu_rw_semaphore *);
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extern void percpu_up_read(struct percpu_rw_semaphore *);
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extern void percpu_down_write(struct percpu_rw_semaphore *);
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extern void percpu_up_write(struct percpu_rw_semaphore *);
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extern int percpu_init_rwsem(struct percpu_rw_semaphore *);
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extern void percpu_free_rwsem(struct percpu_rw_semaphore *);
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2012-09-26 07:46:43 +02:00
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#endif
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