From 4f1772645296a230e04f5c53e79cfb6f841ce634 Mon Sep 17 00:00:00 2001
From: Sage Weil <sage@newdream.net>
Date: Tue, 26 Jul 2011 11:31:08 -0700
Subject: [PATCH] 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 | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index a7db56f1523b..5f0013aafa4b 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -843,11 +843,13 @@ static void update_dentry_lease(struct dentry *dentry,
/*
* 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);