[BLOCK] Document the READ/WRITE splitup of the disk stats

Use the symbolic name where appropriate and add a comment to the
disk_stats structure.

Signed-off-by: Jens Axboe <axboe@suse.de>

1 files changed, 2 insertions, 2 deletions

diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index 8eeaa53a68c9..eef5ccdcd731 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -78,7 +78,7 @@ struct hd_struct {
         sector_t start_sect;
         sector_t nr_sects;
         struct kobject kobj;
-        unsigned ios[2], sectors[2];
+        unsigned ios[2], sectors[2];    /* READs and WRITEs */
         int policy, partno;
 };
 
@@ -89,7 +89,7 @@ struct hd_struct {
 #define GENHD_FL_SUPPRESS_PARTITION_INFO        32
 
 struct disk_stats {
-        unsigned sectors[2];
+        unsigned sectors[2];            /* READs and WRITEs */
         unsigned ios[2];
         unsigned merges[2];
         unsigned ticks[2];