ncpfs: document dentry_unhash usage

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@vandrovec.name>
CC: linux-kernel@vger.kernel.org
Signed-off-by: Sage Weil <sage@newdream.net>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/ncpfs/dir.c b/fs/ncpfs/dir.c
index e3e646b..81c287d 100644 (file)
--- 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;