commit eccb95cee4f0d56faa46ef22fb94dd4a3578d3eb
author Jan Kara <jack@suse.cz> Tue Apr 29 00:59:37 2008 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> Tue Apr 29 08:06:05 2008 -0700
tree 45f2586854927cef529730ae0c7196d931de0c94
parent a8522509200b460443a7ca59138dc63bec1b690a

vfs: fix lock inversion in drop_pagecache_sb()

Fix longstanding lock inversion in drop_pagecache_sb by dropping inode_lock
before calling __invalidate_mapping_pages().  We just have to make sure inode
won't go away from under us by keeping reference to it and putting the
reference only after we have safely resumed the scan of the inode list.  A bit
tricky but not too bad...

Signed-off-by: Jan Kara <jack@suse.cz>
Cc: Fengguang Wu <wfg@mail.ustc.edu.cn>
Cc: David Chinner <dgc@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>