[PATCH 16/26] ncpfs: document dentry_unhash usage

[Sage Weil]

ncpfs returns EBUSY if there are any references to the directory.  The
dentry_unhash call only unhashes the dentry if there are no references.

CC: Petr Vandrovec <petr@xxxxxxxxxxxxxx>
CC: linux-kernel@xxxxxxxxxxxxxxx
Signed-off-by: Sage Weil <sage@xxxxxxxxxxxx>
---
 fs/ncpfs/dir.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/fs/ncpfs/dir.c b/fs/ncpfs/dir.c
index e3e646b..81c287d 100644
--- a/fs/ncpfs/dir.c
+++ b/fs/ncpfs/dir.c
@@ -1033,8 +1033,11 @@ static int ncp_rmdir(struct inode *dir, struct dentry *dentry)
 	DPRINTK("ncp_rmdir: removing %s/%s\n",
 		dentry->d_parent->d_name.name, dentry->d_name.name);
 
+	/*
+	 * fail with EBUSY if there are still references to this
+	 * directory.
+	 */
 	dentry_unhash(dentry);
-
 	error = -EBUSY;
 	if (!d_unhashed(dentry))
 		goto out;
-- 
1.7.0

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