X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=block%2Fblk-cgroup.c;h=e17da947f6bd5d3a988e8acaa7cecf685ae21218;hb=d9b9734c5d2e856d59c074d272a68db91a812857;hp=28d227c5ca7781aed5bb15cf37d3b0f1dcaa8d79;hpb=fa1d0ee69ca8c123dd791d52830a2e146985ce85;p=firefly-linux-kernel-4.4.55.git

diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index 28d227c5ca77..e17da947f6bd 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -928,7 +928,15 @@ struct cgroup_subsys blkio_cgrp_subsys = {
 	.css_offline = blkcg_css_offline,
 	.css_free = blkcg_css_free,
 	.can_attach = blkcg_can_attach,
-	.base_cftypes = blkcg_files,
+	.legacy_cftypes = blkcg_files,
+#ifdef CONFIG_MEMCG
+	/*
+	 * This ensures that, if available, memcg is automatically enabled
+	 * together on the default hierarchy so that the owner cgroup can
+	 * be retrieved from writeback pages.
+	 */
+	.depends_on = 1 << memory_cgrp_id,
+#endif
 };
 EXPORT_SYMBOL_GPL(blkio_cgrp_subsys);
 
@@ -1120,7 +1128,8 @@ int blkcg_policy_register(struct blkcg_policy *pol)
 
 	/* everything is in place, add intf files for the new policy */
 	if (pol->cftypes)
-		WARN_ON(cgroup_add_cftypes(&blkio_cgrp_subsys, pol->cftypes));
+		WARN_ON(cgroup_add_legacy_cftypes(&blkio_cgrp_subsys,
+						  pol->cftypes));
 	ret = 0;
 out_unlock:
 	mutex_unlock(&blkcg_pol_mutex);