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writeback: remove redundant checks for root memcg

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The check for root memcg will be done in wb_get_lookup(), so remove the
redundant one to simplify the code.

Link: https://lkml.kernel.org/r/20230808084431.1632934-1-alexjlzheng@tencent.com
Signed-off-by: Jinliang Zheng <alexjlzheng@tencent.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Jinliang Zheng 2023-08-08 16:44:32 +08:00 • committed by Andrew Morton
parent 97157d8908
commit 9af7c7426c
1 changed files with 0 additions and 3 deletions
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3
mm/backing-dev.c
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@ -732,9 +732,6 @@ struct bdi_writeback *wb_get_create(struct backing_dev_info *bdi,
might_alloc(gfp); might_alloc(gfp);
if (!memcg_css->parent)
return &bdi->wb;
do { do {
wb = wb_get_lookup(bdi, memcg_css); wb = wb_get_lookup(bdi, memcg_css);
} while (!wb && !cgwb_create(bdi, memcg_css, gfp)); } while (!wb && !cgwb_create(bdi, memcg_css, gfp));