--- /dev/null
+From b4f0354e968f5fabd39bc85b99fedae4a97589fe Mon Sep 17 00:00:00 2001
+From: Al Viro <viro@zeniv.linux.org.uk>
+Date: Tue, 29 Apr 2014 23:40:14 -0400
+Subject: new helper: dentry_free()
+
+From: Al Viro <viro@zeniv.linux.org.uk>
+
+commit b4f0354e968f5fabd39bc85b99fedae4a97589fe upstream.
+
+The part of old d_free() that dealt with actual freeing of dentry.
+Taken out of dentry_kill() into a separate function.
+
+Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
+Cc: "Nicholas A. Bellinger" <nab@linux-iscsi.org>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ fs/dcache.c | 15 ++++++++++-----
+ 1 file changed, 10 insertions(+), 5 deletions(-)
+
+--- a/fs/dcache.c
++++ b/fs/dcache.c
+@@ -244,6 +244,15 @@ static void __d_free(struct rcu_head *he
+ kmem_cache_free(dentry_cache, dentry);
+ }
+
++static void dentry_free(struct dentry *dentry)
++{
++ /* if dentry was never visible to RCU, immediate free is OK */
++ if (!(dentry->d_flags & DCACHE_RCUACCESS))
++ __d_free(&dentry->d_u.d_rcu);
++ else
++ call_rcu(&dentry->d_u.d_rcu, __d_free);
++}
++
+ /**
+ * dentry_rcuwalk_barrier - invalidate in-progress rcu-walk lookups
+ * @dentry: the target dentry
+@@ -511,11 +520,7 @@ relock:
+ if (dentry->d_op && dentry->d_op->d_release)
+ dentry->d_op->d_release(dentry);
+
+- /* if dentry was never visible to RCU, immediate free is OK */
+- if (!(dentry->d_flags & DCACHE_RCUACCESS))
+- __d_free(&dentry->d_u.d_rcu);
+- else
+- call_rcu(&dentry->d_u.d_rcu, __d_free);
++ dentry_free(dentry);
+ return parent;
+ }
+