Release 4.11 fs/xfs/mrlock.h
/*
* Copyright (c) 2000-2006 Silicon Graphics, Inc.
* All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms 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. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#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);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Lachlan McIlroy | 24 | 100.00% | 1 | 100.00% |
| Total | 24 | 100.00% | 1 | 100.00% |
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
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Lachlan McIlroy | 30 | 69.77% | 1 | 33.33% |
| Dave Chinner | 10 | 23.26% | 1 | 33.33% |
| Christoph Hellwig | 3 | 6.98% | 1 | 33.33% |
| Total | 43 | 100.00% | 3 | 100.00% |
static inline int mrtryaccess(mrlock_t *mrp)
{
return down_read_trylock(&mrp->mr_lock);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Nathan Scott | 15 | 75.00% | 1 | 50.00% |
| Christoph Hellwig | 5 | 25.00% | 1 | 50.00% |
| Total | 20 | 100.00% | 2 | 100.00% |
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;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Nathan Scott | 28 | 59.57% | 1 | 25.00% |
| Dave Chinner | 10 | 21.28% | 1 | 25.00% |
| Christoph Hellwig | 9 | 19.15% | 2 | 50.00% |
| Total | 47 | 100.00% | 4 | 100.00% |
static inline void mrunlock_excl(mrlock_t *mrp)
{
#if defined(DEBUG) || defined(XFS_WARN)
mrp->mr_writer = 0;
#endif
up_write(&mrp->mr_lock);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Nathan Scott | 20 | 52.63% | 1 | 25.00% |
| Dave Chinner | 10 | 26.32% | 1 | 25.00% |
| Christoph Hellwig | 8 | 21.05% | 2 | 50.00% |
| Total | 38 | 100.00% | 4 | 100.00% |
static inline void mrunlock_shared(mrlock_t *mrp)
{
up_read(&mrp->mr_lock);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Nathan Scott | 10 | 52.63% | 1 | 50.00% |
| Christoph Hellwig | 9 | 47.37% | 1 | 50.00% |
| Total | 19 | 100.00% | 2 | 100.00% |
static inline void mrdemote(mrlock_t *mrp)
{
#if defined(DEBUG) || defined(XFS_WARN)
mrp->mr_writer = 0;
#endif
downgrade_write(&mrp->mr_lock);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Nathan Scott | 19 | 50.00% | 1 | 25.00% |
| Dave Chinner | 10 | 26.32% | 1 | 25.00% |
| Christoph Hellwig | 9 | 23.68% | 2 | 50.00% |
| Total | 38 | 100.00% | 4 | 100.00% |
#endif /* __XFS_SUPPORT_MRLOCK_H__ */
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Nathan Scott | 123 | 38.08% | 2 | 28.57% |
| Christoph Hellwig | 84 | 26.01% | 2 | 28.57% |
| Dave Chinner | 60 | 18.58% | 1 | 14.29% |
| Lachlan McIlroy | 54 | 16.72% | 1 | 14.29% |
| Ingo Molnar | 2 | 0.62% | 1 | 14.29% |
| Total | 323 | 100.00% | 7 | 100.00% |
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