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[PATCH] mutex subsystem, semaphore to mutex: VFS, ->i_sem

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This patch converts the inode semaphore to a mutex. I have tested it on
XFS and compiled as much as one can consider on an ia64. Anyway your
luck with it might be different.

Modified-by: Ingo Molnar <[email protected]>

(finished the conversion)

Signed-off-by: Jes Sorensen <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Jes Sorensen 2006-01-09 15:59:24 -08:00 • committed by Ingo Molnar
commit 1b1dcc1b57
113 changed files with 563 additions and 573 deletions
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10
fs/ext2/acl.c
View file

@ -149,7 +149,7 @@ ext2_iset_acl(struct inode *inode, struct posix_acl **i_acl,
}
/*
* inode->i_sem: don't care
* inode->i_mutex: don't care
*/
static struct posix_acl *
ext2_get_acl(struct inode *inode, int type)
@ -211,7 +211,7 @@ ext2_get_acl(struct inode *inode, int type)
}
/*
* inode->i_sem: down
* inode->i_mutex: down
*/
static int
ext2_set_acl(struct inode *inode, int type, struct posix_acl *acl)
@ -301,8 +301,8 @@ ext2_permission(struct inode *inode, int mask, struct nameidata *nd)
/*
* Initialize the ACLs of a new inode. Called from ext2_new_inode.
*
* dir->i_sem: down
* inode->i_sem: up (access to inode is still exclusive)
* dir->i_mutex: down
* inode->i_mutex: up (access to inode is still exclusive)
*/
int
ext2_init_acl(struct inode *inode, struct inode *dir)
@ -361,7 +361,7 @@ cleanup:
* for directories) are added. There are no more bits available in the
* file mode.
*
* inode->i_sem: down
* inode->i_mutex: down
*/
int
ext2_acl_chmod(struct inode *inode)

2
fs/ext2/ext2.h
View file

@ -53,7 +53,7 @@ struct ext2_inode_info {
#ifdef CONFIG_EXT2_FS_XATTR
/*
* Extended attributes can be read independently of the main file
* data. Taking i_sem even when reading would cause contention
* data. Taking i_mutex even when reading would cause contention
* between readers of EAs and writers of regular file data, so
* instead we synchronize on xattr_sem when reading or changing
* EAs.

4
fs/ext2/super.c
View file

@ -1152,7 +1152,7 @@ static ssize_t ext2_quota_write(struct super_block *sb, int type,
struct buffer_head tmp_bh;
struct buffer_head *bh;
down(&inode->i_sem);
mutex_lock(&inode->i_mutex);
while (towrite > 0) {
tocopy = sb->s_blocksize - offset < towrite ?
sb->s_blocksize - offset : towrite;
@ -1189,7 +1189,7 @@ out:
inode->i_version++;
inode->i_mtime = inode->i_ctime = CURRENT_TIME;
mark_inode_dirty(inode);
up(&inode->i_sem);
mutex_unlock(&inode->i_mutex);
return len - towrite;
}

2
fs/ext2/xattr.c
View file

@ -325,7 +325,7 @@ cleanup:
/*
* Inode operation listxattr()
*
* dentry->d_inode->i_sem: don't care
* dentry->d_inode->i_mutex: don't care
*/
ssize_t
ext2_listxattr(struct dentry *dentry, char *buffer, size_t size)