| From: Jinliang Zheng <alexjlzheng@tencent.com> |
| Subject: writeback: remove redundant checks for root memcg |
| Date: Tue, 8 Aug 2023 16:44:32 +0800 |
| |
| 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> |
| --- |
| |
| mm/backing-dev.c | 3 --- |
| 1 file changed, 3 deletions(-) |
| |
| --- a/mm/backing-dev.c~writeback-remove-redundant-checks-for-root-memcg |
| +++ a/mm/backing-dev.c |
| @@ -732,9 +732,6 @@ struct bdi_writeback *wb_get_create(stru |
| |
| might_alloc(gfp); |
| |
| - if (!memcg_css->parent) |
| - return &bdi->wb; |
| - |
| do { |
| wb = wb_get_lookup(bdi, memcg_css); |
| } while (!wb && !cgwb_create(bdi, memcg_css, gfp)); |
| _ |
