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block: Remove redundant parent blkcg_gp check in check_scale_change 

Function blkcg_iolatency_throttle will make sure blkg->parent is not
NULL before calls check_scale_change. And function check_scale_change
is only called in blkcg_iolatency_throttle.

Signed-off-by: Kemeng Shi <shikemeng@huawei.com>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Link: https://lore.kernel.org/r/20221018111240.22612-2-shikemeng@huawei.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Kemeng Shi 2022-10-18 19:12:38 +08:00 committed by Jens Axboe
parent 64b36075eb
commit db5896e9cf
1 changed files with 0 additions and 3 deletions
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block/blk-iolatency.c
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@ -403,9 +403,6 @@ static void check_scale_change(struct iolatency_grp *iolat)
u64 scale_lat;
int direction = 0;
if (lat_to_blkg(iolat)->parent == NULL)
return;
parent = blkg_to_lat(lat_to_blkg(iolat)->parent);
if (!parent)
return;