linux-kernel - [PATCH 4.4 24/46] FS-Cache: Initialise stores

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Date:   Thu, 15 Jun 2017 19:52:43 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, David Howells <dhowells@...hat.com>,
        Jeff Layton <jlayton@...hat.com>,
        Steve Dickson <steved@...hat.com>,
        Al Viro <viro@...iv.linux.org.uk>,
        Sasha Levin <alexander.levin@...izon.com>
Subject: [PATCH 4.4 24/46] FS-Cache: Initialise stores_lock in netfs cookie

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: David Howells <dhowells@...hat.com>


[ Upstream commit 62deb8187d116581c88c69a2dd9b5c16588545d4 ]

Initialise the stores_lock in fscache netfs cookies.  Technically, it
shouldn't be necessary, since the netfs cookie is an index and stores no
data, but initialising it anyway adds insignificant overhead.

Signed-off-by: David Howells <dhowells@...hat.com>
Reviewed-by: Jeff Layton <jlayton@...hat.com>
Acked-by: Steve Dickson <steved@...hat.com>
Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 fs/fscache/netfs.c |    1 +
 1 file changed, 1 insertion(+)

--- a/fs/fscache/netfs.c
+++ b/fs/fscache/netfs.c
@@ -48,6 +48,7 @@ int __fscache_register_netfs(struct fsca
 	cookie->flags		= 1 << FSCACHE_COOKIE_ENABLED;
 
 	spin_lock_init(&cookie->lock);
+	spin_lock_init(&cookie->stores_lock);
 	INIT_HLIST_HEAD(&cookie->backing_objects);
 
 	/* check the netfs type is not already present */