gfs2: Fix glock rhashtable rcu bug

[mirror_ubuntu-artful-kernel.git] / fs / gfs2 / glock.c

diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index 6cd71c50b8bdc7f21a90e4eb29c1ff5162b455ff..c38ab6c818983803d67815ac4a32b9302e48795d 100644 (file)
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -80,9 +80,9 @@ static struct rhashtable_params ht_parms = {
 
 static struct rhashtable gl_hash_table;
 
-void gfs2_glock_free(struct gfs2_glock *gl)
+static void gfs2_glock_dealloc(struct rcu_head *rcu)
 {
-       struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
+       struct gfs2_glock *gl = container_of(rcu, struct gfs2_glock, gl_rcu);
 
        if (gl->gl_ops->go_flags & GLOF_ASPACE) {
                kmem_cache_free(gfs2_glock_aspace_cachep, gl);
@@ -90,6 +90,13 @@ void gfs2_glock_free(struct gfs2_glock *gl)
                kfree(gl->gl_lksb.sb_lvbptr);
                kmem_cache_free(gfs2_glock_cachep, gl);
        }
+}
+
+void gfs2_glock_free(struct gfs2_glock *gl)
+{
+       struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
+
+       call_rcu(&gl->gl_rcu, gfs2_glock_dealloc);
        if (atomic_dec_and_test(&sdp->sd_glock_disposal))
                wake_up(&sdp->sd_glock_wait);
 }