[PATCH v2 1/3] block: Remove redundant parent blkcg_gp check in check_scale_change

From: Kemeng Shi
Date: Tue Oct 18 2022 - 07:13:04 EST


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@xxxxxxxxxx>
Reviewed-by: Josef Bacik <josef@xxxxxxxxxxxxxx>
---
block/blk-iolatency.c | 3 ---
1 file changed, 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;
--
2.30.0