block/genhd: Change some numerals into macros

Rename the numerals in the diskstats_show() into the macros.

Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Liu Yuan <tailai.ly@taobao.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>

diff --git a/block/genhd.c b/block/genhd.c
index 6a5b772..73d85a8 100644 (file)
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -1158,14 +1158,14 @@ static int diskstats_show(struct seq_file *seqf, void *v)
                           "%u %lu %lu %llu %u %u %u %u\n",
                           MAJOR(part_devt(hd)), MINOR(part_devt(hd)),
                           disk_name(gp, hd->partno, buf),
-                          part_stat_read(hd, ios[0]),
-                          part_stat_read(hd, merges[0]),
-                          (unsigned long long)part_stat_read(hd, sectors[0]),
-                          jiffies_to_msecs(part_stat_read(hd, ticks[0])),
-                          part_stat_read(hd, ios[1]),
-                          part_stat_read(hd, merges[1]),
-                          (unsigned long long)part_stat_read(hd, sectors[1]),
-                          jiffies_to_msecs(part_stat_read(hd, ticks[1])),
+                          part_stat_read(hd, ios[READ]),
+                          part_stat_read(hd, merges[READ]),
+                          (unsigned long long)part_stat_read(hd, sectors[READ]),
+                          jiffies_to_msecs(part_stat_read(hd, ticks[READ])),
+                          part_stat_read(hd, ios[WRITE]),
+                          part_stat_read(hd, merges[WRITE]),
+                          (unsigned long long)part_stat_read(hd, sectors[WRITE]),
+                          jiffies_to_msecs(part_stat_read(hd, ticks[WRITE])),
                           part_in_flight(hd),
                           jiffies_to_msecs(part_stat_read(hd, io_ticks)),
                           jiffies_to_msecs(part_stat_read(hd, time_in_queue))