block: use ktime_get_ns() instead of sched_clock() for cfq and bfq
authorOmar Sandoval <osandov@fb.com>
Wed, 9 May 2018 09:08:51 +0000 (02:08 -0700)
committerJens Axboe <axboe@kernel.dk>
Wed, 9 May 2018 14:33:06 +0000 (08:33 -0600)
commit84c7afcebed913c93d50f116b046b7f0d8ec0cdc
tree0c4b9bc41c6ef64b53ee51251ee3b957b2533d05
parent544ccc8dc904db55d4576c27a1eb66a888ffacea
block: use ktime_get_ns() instead of sched_clock() for cfq and bfq

cfq and bfq have some internal fields that use sched_clock() which can
trivially use ktime_get_ns() instead. Their timestamp fields in struct
request can also use ktime_get_ns(), which resolves the 8 year old
comment added by commit 28f4197e5d47 ("block: disable preemption before
using sched_clock()").

Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
block/bfq-cgroup.c
block/bfq-iosched.h
block/cfq-iosched.c
include/linux/blkdev.h