Patch "new helper: dentry_free()" has been added to the 3.14-stable tree

Patch "new helper: dentry_free()" has been added to the 3.14-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    new helper: dentry_free()

to the 3.14-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     new-helper-dentry_free.patch
and it can be found in the queue-3.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>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;
 }
 


Patches currently in stable-queue which might be from viro@zeniv.linux.org.uk are

queue-3.14/new-helper-dentry_free.patch
queue-3.14/fold-try_prune_one_dentry.patch
queue-3.14/fold-d_kill-and-d_free.patch
queue-3.14/ipc-modify-message-queue-accounting-to-not-take-kernel-data-structures-into-account.patch
queue-3.14/sg_start_req-make-sure-that-there-s-not-too-many-elements-in-iovec.patch