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VFS: move inode_lock into sync_sb_inodes

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This patch makes 'sync_sb_inodes()' lock 'inode_lock', rather
than expect that the caller will do this.

This change was previously done by Hans Reiser <reiser@namesys.com>
and sat in the -mm tree.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
This commit is contained in:
Hans Reiser 2008-05-07 15:48:57 +03:00 committed by Artem Bityutskiy
parent bce7f793da
commit ae8547b0a9
1 changed files with 3 additions and 8 deletions
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11
fs/fs-writeback.c
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@ -424,8 +424,6 @@ __writeback_single_inode(struct inode *inode, struct writeback_control *wbc)
* WB_SYNC_HOLD is a hack for sys_sync(): reattach the inode to sb->s_dirty so
* that it can be located for waiting on in __writeback_single_inode().
*
* Called under inode_lock.
*
* If `bdi' is non-zero then we're being asked to writeback a specific queue.
* This function assumes that the blockdev superblock's inodes are backed by
* a variety of queues, so all inodes are searched. For other superblocks,
@ -446,6 +444,7 @@ sync_sb_inodes(struct super_block *sb, struct writeback_control *wbc)
{
const unsigned long start = jiffies; /* livelock avoidance */
spin_lock(&inode_lock);
if (!wbc->for_kupdate || list_empty(&sb->s_io))
queue_io(sb, wbc->older_than_this);
@ -524,6 +523,7 @@ sync_sb_inodes(struct super_block *sb, struct writeback_control *wbc)
if (!list_empty(&sb->s_more_io))
wbc->more_io = 1;
}
spin_unlock(&inode_lock);
return; /* Leave any unwritten inodes on s_io */
}
@ -565,11 +565,8 @@ restart:
* be unmounted by the time it is released.
*/
if (down_read_trylock(&sb->s_umount)) {
if (sb->s_root) {
spin_lock(&inode_lock);
if (sb->s_root)
sync_sb_inodes(sb, wbc);
spin_unlock(&inode_lock);
}
up_read(&sb->s_umount);
}
spin_lock(&sb_lock);
@ -607,9 +604,7 @@ void sync_inodes_sb(struct super_block *sb, int wait)
(inodes_stat.nr_inodes - inodes_stat.nr_unused) +
nr_dirty + nr_unstable;
wbc.nr_to_write += wbc.nr_to_write / 2; /* Bit more for luck */
spin_lock(&inode_lock);
sync_sb_inodes(sb, &wbc);
spin_unlock(&inode_lock);
}
/*