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authorKemeng Shi <shikemeng@huawei.com>2022-10-18 13:12:38 +0200
committerJens Axboe <axboe@kernel.dk>2022-11-01 16:12:24 +0100
commitdb5896e9cf93f119c0b181c5e6b473d8bf0302e5 (patch)
treeef26c4581438227e3a886042dd6ad36732d46c81 /block/blk-iolatency.c
parentblock: split elevator_switch (diff)
downloadlinux-db5896e9cf93f119c0b181c5e6b473d8bf0302e5.tar.xz
linux-db5896e9cf93f119c0b181c5e6b473d8bf0302e5.zip
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>
Diffstat (limited to 'block/blk-iolatency.c')
-rw-r--r--block/blk-iolatency.c3
1 files changed, 0 insertions, 3 deletions
diff --git a/block/blk-iolatency.c b/block/blk-iolatency.c
index 571fa95aafe9..b24d7b788ba3 100644
--- a/block/blk-iolatency.c
+++ b/block/blk-iolatency.c
@@ -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;