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-rw-r--r--include/linux/blk_types.h7
1 files changed, 4 insertions, 3 deletions
diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index c0ba1a038ff3..46c005d601ac 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -174,10 +174,11 @@ struct bio {
void *bi_private;
#ifdef CONFIG_BLK_CGROUP
/*
- * Optional css associated with this bio. Put on bio
- * release. Read comment on top of bio_associate_current().
+ * Represents the association of the css and request_queue for the bio.
+ * If a bio goes direct to device, it will not have a blkg as it will
+ * not have a request_queue associated with it. The reference is put
+ * on release of the bio.
*/
- struct cgroup_subsys_state *bi_css;
struct blkcg_gq *bi_blkg;
struct bio_issue bi_issue;
#endif