From: Yan, Zheng <zheng.z.yan@intel.com>
Date: Sat, 3 Nov 2012 02:32:37 +0000 (+0800)
Subject: ceph: Hold caps_list_lock when adjusting caps_{use, total}_count
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=4d1d0534f53863108fdea496288cb3310f88118d;p=linux-beck.git

ceph: Hold caps_list_lock when adjusting caps_{use, total}_count

Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
Signed-off-by: Sage Weil <sage@inktank.com>
---

diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index 3251e9cc6401..2d0141e95c88 100644
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -236,8 +236,10 @@ static struct ceph_cap *get_cap(struct ceph_mds_client *mdsc,
 	if (!ctx) {
 		cap = kmem_cache_alloc(ceph_cap_cachep, GFP_NOFS);
 		if (cap) {
+			spin_lock(&mdsc->caps_list_lock);
 			mdsc->caps_use_count++;
 			mdsc->caps_total_count++;
+			spin_unlock(&mdsc->caps_list_lock);
 		}
 		return cap;
 	}