1 files changed, 5 insertions, 0 deletions

diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index 14cbf60167a7..133f322573b5 100644
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -658,9 +658,11 @@ int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number,
         struct kmem_cache *cachep;
         int ret, tries = 0;
 
+        rcu_read_lock();
         gl = rhashtable_lookup_fast(&gl_hash_table, &name, ht_parms);
         if (gl && !lockref_get_not_dead(&gl->gl_lockref))
                 gl = NULL;
+        rcu_read_unlock();
 
         *glp = gl;
         if (gl)
@@ -728,15 +730,18 @@ again:
 
         if (ret == -EEXIST) {
                 ret = 0;
+                rcu_read_lock();
                 tmp = rhashtable_lookup_fast(&gl_hash_table, &name, ht_parms);
                 if (tmp == NULL || !lockref_get_not_dead(&tmp->gl_lockref)) {
                         if (++tries < 100) {
+                                rcu_read_unlock();
                                 cond_resched();
                                 goto again;
                         }
                         tmp = NULL;
                         ret = -ENOMEM;
                 }
+                rcu_read_unlock();
         } else {
                 WARN_ON_ONCE(ret);
         }