cfq-iosched: document the cfqq flags

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

1 files changed, 9 insertions, 9 deletions

diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 4c24986151ba..975cdfc8d614 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -162,15 +162,15 @@ struct cfq_queue {
 };
 
 enum cfqq_state_flags {
-        CFQ_CFQQ_FLAG_on_rr = 0,
-        CFQ_CFQQ_FLAG_wait_request,
-        CFQ_CFQQ_FLAG_must_alloc,
-        CFQ_CFQQ_FLAG_must_alloc_slice,
-        CFQ_CFQQ_FLAG_must_dispatch,
-        CFQ_CFQQ_FLAG_fifo_expire,
-        CFQ_CFQQ_FLAG_idle_window,
-        CFQ_CFQQ_FLAG_prio_changed,
-        CFQ_CFQQ_FLAG_queue_new,
+        CFQ_CFQQ_FLAG_on_rr = 0,        /* on round-robin busy list */
+        CFQ_CFQQ_FLAG_wait_request,     /* waiting for a request */
+        CFQ_CFQQ_FLAG_must_alloc,       /* must be allowed rq alloc */
+        CFQ_CFQQ_FLAG_must_alloc_slice, /* per-slice must_alloc flag */
+        CFQ_CFQQ_FLAG_must_dispatch,    /* must dispatch, even if expired */
+        CFQ_CFQQ_FLAG_fifo_expire,      /* FIFO checked in this slice */
+        CFQ_CFQQ_FLAG_idle_window,      /* slice idling enabled */
+        CFQ_CFQQ_FLAG_prio_changed,     /* task priority has changed */
+        CFQ_CFQQ_FLAG_queue_new,        /* queue never been serviced */
 };
 
 #define CFQ_CFQQ_FNS(name)                                              \