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Diffstat (limited to 'fs/xfs/linux-2.6/mrlock.h')
-rw-r--r--fs/xfs/linux-2.6/mrlock.h106
1 files changed, 0 insertions, 106 deletions
diff --git a/fs/xfs/linux-2.6/mrlock.h b/fs/xfs/linux-2.6/mrlock.h
deleted file mode 100644
index d2c11a098ff..00000000000
--- a/fs/xfs/linux-2.6/mrlock.h
+++ /dev/null
@@ -1,106 +0,0 @@
-/*
- * Copyright (c) 2000-2004 Silicon Graphics, Inc. All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it would be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- *
- * Further, this software is distributed without any warranty that it is
- * free of the rightful claim of any third person regarding infringement
- * or the like. Any license provided herein, whether implied or
- * otherwise, applies only to this software file. Patent licenses, if
- * any, provided herein do not apply to combinations of this program with
- * other software, or any other product whatsoever.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write the Free Software Foundation, Inc., 59
- * Temple Place - Suite 330, Boston MA 02111-1307, USA.
- *
- * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
- * Mountain View, CA 94043, or:
- *
- * http://www.sgi.com
- *
- * For further information regarding this notice, see:
- *
- * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
- */
-#ifndef __XFS_SUPPORT_MRLOCK_H__
-#define __XFS_SUPPORT_MRLOCK_H__
-
-#include <linux/rwsem.h>
-
-enum { MR_NONE, MR_ACCESS, MR_UPDATE };
-
-typedef struct {
- struct rw_semaphore mr_lock;
- int mr_writer;
-} mrlock_t;
-
-#define mrinit(mrp, name) \
- ( (mrp)->mr_writer = 0, init_rwsem(&(mrp)->mr_lock) )
-#define mrlock_init(mrp, t,n,s) mrinit(mrp, n)
-#define mrfree(mrp) do { } while (0)
-#define mraccess(mrp) mraccessf(mrp, 0)
-#define mrupdate(mrp) mrupdatef(mrp, 0)
-
-static inline void mraccessf(mrlock_t *mrp, int flags)
-{
- down_read(&mrp->mr_lock);
-}
-
-static inline void mrupdatef(mrlock_t *mrp, int flags)
-{
- down_write(&mrp->mr_lock);
- mrp->mr_writer = 1;
-}
-
-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;
- mrp->mr_writer = 1;
- return 1;
-}
-
-static inline void mrunlock(mrlock_t *mrp)
-{
- if (mrp->mr_writer) {
- mrp->mr_writer = 0;
- up_write(&mrp->mr_lock);
- } else {
- up_read(&mrp->mr_lock);
- }
-}
-
-static inline void mrdemote(mrlock_t *mrp)
-{
- mrp->mr_writer = 0;
- downgrade_write(&mrp->mr_lock);
-}
-
-#ifdef DEBUG
-/*
- * Debug-only routine, without some platform-specific asm code, we can
- * now only answer requests regarding whether we hold the lock for write
- * (reader state is outside our visibility, we only track writer state).
- * Note: means !ismrlocked would give false positivies, so don't do that.
- */
-static inline int ismrlocked(mrlock_t *mrp, int type)
-{
- if (mrp && type == MR_UPDATE)
- return mrp->mr_writer;
- return 1;
-}
-#endif
-
-#endif /* __XFS_SUPPORT_MRLOCK_H__ */