forked from luck/tmp_suning_uos_patched
c59d87c460
Use the move from Linux 2.6 to Linux 3.x as an excuse to kill the annoying subdirectories in the XFS source code. Besides the large amount of file rename the only changes are to the Makefile, a few files including headers with the subdirectory prefix, and the binary sysctl compat code that includes a header under fs/xfs/ from kernel/. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
91 lines
2.0 KiB
C
91 lines
2.0 KiB
C
/*
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* Copyright (c) 2000-2006 Silicon Graphics, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef __XFS_SUPPORT_MRLOCK_H__
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#define __XFS_SUPPORT_MRLOCK_H__
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#include <linux/rwsem.h>
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typedef struct {
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struct rw_semaphore mr_lock;
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#ifdef DEBUG
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int mr_writer;
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#endif
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} mrlock_t;
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#ifdef DEBUG
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#define mrinit(mrp, name) \
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do { (mrp)->mr_writer = 0; init_rwsem(&(mrp)->mr_lock); } while (0)
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#else
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#define mrinit(mrp, name) \
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do { init_rwsem(&(mrp)->mr_lock); } while (0)
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#endif
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#define mrlock_init(mrp, t,n,s) mrinit(mrp, n)
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#define mrfree(mrp) do { } while (0)
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static inline void mraccess_nested(mrlock_t *mrp, int subclass)
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{
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down_read_nested(&mrp->mr_lock, subclass);
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}
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static inline void mrupdate_nested(mrlock_t *mrp, int subclass)
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{
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down_write_nested(&mrp->mr_lock, subclass);
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#ifdef DEBUG
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mrp->mr_writer = 1;
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#endif
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}
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static inline int mrtryaccess(mrlock_t *mrp)
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{
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return down_read_trylock(&mrp->mr_lock);
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}
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static inline int mrtryupdate(mrlock_t *mrp)
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{
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if (!down_write_trylock(&mrp->mr_lock))
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return 0;
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#ifdef DEBUG
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mrp->mr_writer = 1;
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#endif
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return 1;
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}
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static inline void mrunlock_excl(mrlock_t *mrp)
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{
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#ifdef DEBUG
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mrp->mr_writer = 0;
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#endif
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up_write(&mrp->mr_lock);
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}
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static inline void mrunlock_shared(mrlock_t *mrp)
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{
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up_read(&mrp->mr_lock);
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}
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static inline void mrdemote(mrlock_t *mrp)
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{
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#ifdef DEBUG
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mrp->mr_writer = 0;
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#endif
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downgrade_write(&mrp->mr_lock);
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}
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#endif /* __XFS_SUPPORT_MRLOCK_H__ */
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