commit 4f1772645296a230e04f5c53e79cfb6f841ce634
author Sage Weil <sage@newdream.net> Tue Jul 26 11:31:08 2011 -0700
committer Sage Weil <sage@newdream.net> Tue Jul 26 11:31:08 2011 -0700
tree b46dab3e88acef56a074c5d519a851dec5c1ade1
parent e5f86dc377e7ff2b4195831153a85a3e76fefff2

ceph: document locking for ceph_set_dentry_offset

Reviewed-by: Yehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>

fs/ceph/inode.c

diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index a7db56f..5f0013a 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -843,11 +843,13 @@
 /*
  * Set dentry's directory position based on the current dir's max, and
  * order it in d_subdirs, so that dcache_readdir behaves.
+ *
+ * Always called under directory's i_mutex.
  */
 static void ceph_set_dentry_offset(struct dentry *dn)
 {
 	struct dentry *dir = dn->d_parent;
-	struct inode *inode = dn->d_parent->d_inode;
+	struct inode *inode = dir->d_inode;
 	struct ceph_dentry_info *di;
 
 	BUG_ON(!inode);