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libspl: move rwlock definitions from zfs_context.h

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Sponsored-by: https://despairlabs.com/sponsor/
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rob Norris <robn@despairlabs.com>
Closes #17861
This commit is contained in:
Rob Norris
2025-08-09 09:51:43 +10:00
committed by Brian Behlendorf
parent 3e37ea85af
commit c7eb0a7633
3 changed files with 64 additions and 29 deletions
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include/sys/zfs_context.h
+1 -29
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@@ -77,7 +77,6 @@ extern "C" {
#include <sys/zfs_context_os.h>
#else /* _KERNEL || _STANDALONE */
#define _SYS_RWLOCK_H
#define _SYS_CONDVAR_H
#define _SYS_VNODE_H
#define _SYS_VFS_H
@@ -122,6 +121,7 @@ extern "C" {
#include <sys/trace_zfs.h>
#include <sys/mutex.h>
#include <sys/rwlock.h>
#include <sys/zfs_delay.h>
#include <sys/zfs_context_os.h>
@@ -253,34 +253,6 @@ extern kthread_t *zk_thread_create(const char *name, void (*func)(void *),
#define kpreempt_disable() ((void)0)
#define kpreempt_enable() ((void)0)
/*
* RW locks
*/
typedef struct krwlock {
pthread_rwlock_t rw_lock;
pthread_t rw_owner;
uint_t rw_readers;
} krwlock_t;
typedef int krw_t;
#define RW_READER 0
#define RW_WRITER 1
#define RW_DEFAULT RW_READER
#define RW_NOLOCKDEP RW_READER
#define RW_READ_HELD(rw) ((rw)->rw_readers > 0)
#define RW_WRITE_HELD(rw) pthread_equal((rw)->rw_owner, pthread_self())
#define RW_LOCK_HELD(rw) (RW_READ_HELD(rw) || RW_WRITE_HELD(rw))
extern void rw_init(krwlock_t *rwlp, char *name, int type, void *arg);
extern void rw_destroy(krwlock_t *rwlp);
extern void rw_enter(krwlock_t *rwlp, krw_t rw);
extern int rw_tryenter(krwlock_t *rwlp, krw_t rw);
extern int rw_tryupgrade(krwlock_t *rwlp);
extern void rw_exit(krwlock_t *rwlp);
#define rw_downgrade(rwlp) do { } while (0)
/*
* Credentials
*/