diff options
| author | Christoph Hellwig <hch@lst.de> | 2022-04-20 06:27:20 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-05-02 14:06:20 -0600 |
| commit | bc5fee91f26d8d1428fb744e5ad04b1417a85197 (patch) | |
| tree | 9fdbe1a53592360684a20df76412e8856546cc0c /block/blk-cgroup.c | |
| parent | c97ab271576dec2170e7b804cb05f7617b30fed9 (diff) | |
| download | linux-bc5fee91f26d8d1428fb744e5ad04b1417a85197.tar.bz2 | |
blk-cgroup: move blkcg_css to blk-cgroup.c
blkcg_css is only used in blk-cgroup.c, so move it there.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20220420042723.1010598-13-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-cgroup.c')
| -rw-r--r-- | block/blk-cgroup.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c index 8e32cc494808..8da00ddc1766 100644 --- a/block/blk-cgroup.c +++ b/block/blk-cgroup.c @@ -59,6 +59,23 @@ static struct workqueue_struct *blkcg_punt_bio_wq; #define BLKG_DESTROY_BATCH_SIZE 64 +/** + * blkcg_css - find the current css + * + * Find the css associated with either the kthread or the current task. + * This may return a dying css, so it is up to the caller to use tryget logic + * to confirm it is alive and well. + */ +static struct cgroup_subsys_state *blkcg_css(void) +{ + struct cgroup_subsys_state *css; + + css = kthread_blkcg(); + if (css) + return css; + return task_css(current, io_cgrp_id); +} + static bool blkcg_policy_enabled(struct request_queue *q, const struct blkcg_policy *pol) { |