diff options
Diffstat (limited to 'fs/xfs/mrlock.h')
| -rw-r--r-- | fs/xfs/mrlock.h | 78 | 
1 files changed, 0 insertions, 78 deletions
diff --git a/fs/xfs/mrlock.h b/fs/xfs/mrlock.h deleted file mode 100644 index 79155eec341b..000000000000 --- a/fs/xfs/mrlock.h +++ /dev/null @@ -1,78 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Copyright (c) 2000-2006 Silicon Graphics, Inc. - * All Rights Reserved. - */ -#ifndef __XFS_SUPPORT_MRLOCK_H__ -#define __XFS_SUPPORT_MRLOCK_H__ - -#include <linux/rwsem.h> - -typedef struct { -	struct rw_semaphore	mr_lock; -#if defined(DEBUG) || defined(XFS_WARN) -	int			mr_writer; -#endif -} mrlock_t; - -#if defined(DEBUG) || defined(XFS_WARN) -#define mrinit(mrp, name)	\ -	do { (mrp)->mr_writer = 0; init_rwsem(&(mrp)->mr_lock); } while (0) -#else -#define mrinit(mrp, name)	\ -	do { init_rwsem(&(mrp)->mr_lock); } while (0) -#endif - -#define mrlock_init(mrp, t,n,s)	mrinit(mrp, n) -#define mrfree(mrp)		do { } while (0) - -static inline void mraccess_nested(mrlock_t *mrp, int subclass) -{ -	down_read_nested(&mrp->mr_lock, subclass); -} - -static inline void mrupdate_nested(mrlock_t *mrp, int subclass) -{ -	down_write_nested(&mrp->mr_lock, subclass); -#if defined(DEBUG) || defined(XFS_WARN) -	mrp->mr_writer = 1; -#endif -} - -static inline int mrtryaccess(mrlock_t *mrp) -{ -	return down_read_trylock(&mrp->mr_lock); -} - -static inline int mrtryupdate(mrlock_t *mrp) -{ -	if (!down_write_trylock(&mrp->mr_lock)) -		return 0; -#if defined(DEBUG) || defined(XFS_WARN) -	mrp->mr_writer = 1; -#endif -	return 1; -} - -static inline void mrunlock_excl(mrlock_t *mrp) -{ -#if defined(DEBUG) || defined(XFS_WARN) -	mrp->mr_writer = 0; -#endif -	up_write(&mrp->mr_lock); -} - -static inline void mrunlock_shared(mrlock_t *mrp) -{ -	up_read(&mrp->mr_lock); -} - -static inline void mrdemote(mrlock_t *mrp) -{ -#if defined(DEBUG) || defined(XFS_WARN) -	mrp->mr_writer = 0; -#endif -	downgrade_write(&mrp->mr_lock); -} - -#endif /* __XFS_SUPPORT_MRLOCK_H__ */  |