[PATCH] mutex subsystem, semaphore to mutex: VFS, ->i_sem
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 <mingo@elte.hu>
(finished the conversion)
Signed-off-by: Jes Sorensen <jes@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/fs/ext2/acl.c b/fs/ext2/acl.c
index 6af2f41..239133d 100644
--- a/fs/ext2/acl.c
+++ b/fs/ext2/acl.c
@@ -149,7 +149,7 @@
}
/*
- * 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 @@
}
/*
- * 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 @@
/*
* 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 @@
* 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)
diff --git a/fs/ext2/ext2.h b/fs/ext2/ext2.h
index e977f85..00de0a7 100644
--- a/fs/ext2/ext2.h
+++ b/fs/ext2/ext2.h
@@ -53,7 +53,7 @@
#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.
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index 522fa70..8d68198 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -1152,7 +1152,7 @@
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 @@
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;
}
diff --git a/fs/ext2/xattr.c b/fs/ext2/xattr.c
index 0099462..f7a3b5f 100644
--- a/fs/ext2/xattr.c
+++ b/fs/ext2/xattr.c
@@ -325,7 +325,7 @@
/*
* 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)