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blk-cgroup: simplify blkg freeing from initialization failure paths
There is no need to delay freeing a blkg to a workqueue when freeing it after an initialization failure. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Tejun Heo <tj@kernel.org> Link: https://lore.kernel.org/r/20230203150400.3199230-5-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
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@ -114,10 +114,8 @@ static bool blkcg_policy_enabled(struct request_queue *q,
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return pol && test_bit(pol->plid, q->blkcg_pols);
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}
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static void blkg_free_workfn(struct work_struct *work)
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static void blkg_free(struct blkcg_gq *blkg)
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{
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struct blkcg_gq *blkg = container_of(work, struct blkcg_gq,
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free_work);
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struct request_queue *q = blkg->q;
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int i;
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@ -143,23 +141,9 @@ static void blkg_free_workfn(struct work_struct *work)
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kfree(blkg);
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}
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/**
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* blkg_free - free a blkg
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* @blkg: blkg to free
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*
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* Free @blkg which may be partially allocated.
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*/
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static void blkg_free(struct blkcg_gq *blkg)
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static void blkg_free_workfn(struct work_struct *work)
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{
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if (!blkg)
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return;
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/*
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* Both ->pd_free_fn() and request queue's release handler may
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* sleep, so free us by scheduling one work func
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*/
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INIT_WORK(&blkg->free_work, blkg_free_workfn);
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schedule_work(&blkg->free_work);
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blkg_free(container_of(work, struct blkcg_gq, free_work));
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}
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static void __blkg_release(struct rcu_head *rcu)
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@ -170,7 +154,10 @@ static void __blkg_release(struct rcu_head *rcu)
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/* release the blkcg and parent blkg refs this blkg has been holding */
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css_put(&blkg->blkcg->css);
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blkg_free(blkg);
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/* ->pd_free_fn() may sleep, so free from a work queue */
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INIT_WORK(&blkg->free_work, blkg_free_workfn);
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schedule_work(&blkg->free_work);
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}
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/*
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