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| author | Ingo Molnar <mingo@elte.hu> | 2006-01-09 15:59:25 -0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@hera.kernel.org> | 2006-01-09 15:59:25 -0800 |
| commit | 7892f2f48d165a34b0b8130c8a195dfd807b8cb6 (patch) | |
| tree | 592b29350c168aa5758700820ab22fb56e72a567 | |
| parent | 1b1dcc1b57a49136f118a0f16367256ff9994a69 (diff) | |
| download | kernel_samsung_smdk4412-7892f2f48d165a34b0b8130c8a195dfd807b8cb6.zip kernel_samsung_smdk4412-7892f2f48d165a34b0b8130c8a195dfd807b8cb6.tar.gz kernel_samsung_smdk4412-7892f2f48d165a34b0b8130c8a195dfd807b8cb6.tar.bz2 | |
[PATCH] mutex subsystem, semaphore to mutex: VFS, sb->s_lock
This patch converts the superblock-lock semaphore to a mutex, affecting
lock_super()/unlock_super(). Tested on ext3 and XFS.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | fs/ext3/super.c | 2 | ||||
| -rw-r--r-- | fs/ocfs2/super.c | 2 | ||||
| -rw-r--r-- | fs/super.c | 2 | ||||
| -rw-r--r-- | include/linux/fs.h | 6 |
4 files changed, 6 insertions, 6 deletions
diff --git a/fs/ext3/super.c b/fs/ext3/super.c index c3dbebd..56bf765 100644 --- a/fs/ext3/super.c +++ b/fs/ext3/super.c @@ -2150,7 +2150,7 @@ int ext3_force_commit(struct super_block *sb) static void ext3_write_super (struct super_block * sb) { - if (down_trylock(&sb->s_lock) == 0) + if (mutex_trylock(&sb->s_lock) != 0) BUG(); sb->s_dirt = 0; } diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c index 48bf7f0..364d64b 100644 --- a/fs/ocfs2/super.c +++ b/fs/ocfs2/super.c @@ -169,7 +169,7 @@ static match_table_t tokens = { */ static void ocfs2_write_super(struct super_block *sb) { - if (down_trylock(&sb->s_lock) == 0) + if (mutex_trylock(&sb->s_lock) != 0) BUG(); sb->s_dirt = 0; } @@ -72,7 +72,7 @@ static struct super_block *alloc_super(void) INIT_HLIST_HEAD(&s->s_anon); INIT_LIST_HEAD(&s->s_inodes); init_rwsem(&s->s_umount); - sema_init(&s->s_lock, 1); + mutex_init(&s->s_lock); down_write(&s->s_umount); s->s_count = S_BIAS; atomic_set(&s->s_active, 1); diff --git a/include/linux/fs.h b/include/linux/fs.h index 01654b2..92ae3e2 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -821,7 +821,7 @@ struct super_block { unsigned long s_magic; struct dentry *s_root; struct rw_semaphore s_umount; - struct semaphore s_lock; + struct mutex s_lock; int s_count; int s_syncing; int s_need_sync_fs; @@ -893,13 +893,13 @@ static inline int has_fs_excl(void) static inline void lock_super(struct super_block * sb) { get_fs_excl(); - down(&sb->s_lock); + mutex_lock(&sb->s_lock); } static inline void unlock_super(struct super_block * sb) { put_fs_excl(); - up(&sb->s_lock); + mutex_unlock(&sb->s_lock); } /* |