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authorSteven Rostedt <rostedt@goodmis.org>2011-08-22 11:52:28 +0800
committerAl Viro <viro@zeniv.linux.org.uk>2012-02-13 20:45:37 -0500
commit1d6f2097865e64963e90cce04980dce2f9fc023f (patch)
tree5173ccf565587797c62b290331ce53dfcb2fc305 /fs/autofs4/expire.c
parentvfs: fix d_inode_lookup() dentry ref leak (diff)
downloadlinux-dev-1d6f2097865e64963e90cce04980dce2f9fc023f.tar.xz
linux-dev-1d6f2097865e64963e90cce04980dce2f9fc023f.zip
autofs4 - fix lockdep splat in autofs
When recursing down the locks when traversing a tree/list in get_next_positive_dentry() or get_next_positive_subdir() a lock can change from being nested to being a parent which breaks lockdep. This patch tells lockdep about what we did. Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Acked-by: Ian Kent <raven@themaw.net> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/autofs4/expire.c')
-rw-r--r--fs/autofs4/expire.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/autofs4/expire.c b/fs/autofs4/expire.c
index 450f529a4eae..1feb68ecef95 100644
--- a/fs/autofs4/expire.c
+++ b/fs/autofs4/expire.c
@@ -124,6 +124,7 @@ start:
/* Negative dentry - try next */
if (!simple_positive(q)) {
spin_unlock(&p->d_lock);
+ lock_set_subclass(&q->d_lock.dep_map, 0, _RET_IP_);
p = q;
goto again;
}
@@ -186,6 +187,7 @@ again:
/* Negative dentry - try next */
if (!simple_positive(ret)) {
spin_unlock(&p->d_lock);
+ lock_set_subclass(&ret->d_lock.dep_map, 0, _RET_IP_);
p = ret;
goto again;
}