From: Christoph Hellwig <hch@lst.de>
To: Jens Axboe <axboe@kernel.dk>
Cc: Paolo Valente <paolo.valente@linaro.org>,
Tejun Heo <tj@kernel.org>, James Smart <james.smart@broadcom.com>,
Dick Kennedy <dick.kennedy@broadcom.com>,
linux-block@vger.kernel.org, cgroups@vger.kernel.org,
linux-nvme@lists.infradead.org, linux-mm@kvack.org
Subject: [PATCH 01/15] blk-cgroup: remove __bio_blkcg
Date: Wed, 20 Apr 2022 06:27:09 +0200 [thread overview]
Message-ID: <20220420042723.1010598-2-hch@lst.de> (raw)
In-Reply-To: <20220420042723.1010598-1-hch@lst.de>
Remove the unused and deprecated __bio_blkcg helper.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
block/blk-cgroup.h | 23 -----------------------
1 file changed, 23 deletions(-)
diff --git a/block/blk-cgroup.h b/block/blk-cgroup.h
index 47e1e38390c96..49e88fc9cc391 100644
--- a/block/blk-cgroup.h
+++ b/block/blk-cgroup.h
@@ -139,27 +139,6 @@ static inline struct cgroup_subsys_state *blkcg_css(void)
return task_css(current, io_cgrp_id);
}
-/**
- * __bio_blkcg - internal, inconsistent version to get blkcg
- *
- * DO NOT USE.
- * This function is inconsistent and consequently is dangerous to use. The
- * first part of the function returns a blkcg where a reference is owned by the
- * bio. This means it does not need to be rcu protected as it cannot go away
- * with the bio owning a reference to it. However, the latter potentially gets
- * it from task_css(). This can race against task migration and the cgroup
- * dying. It is also semantically different as it must be called rcu protected
- * and is susceptible to failure when trying to get a reference to it.
- * Therefore, it is not ok to assume that *_get() will always succeed on the
- * blkcg returned here.
- */
-static inline struct blkcg *__bio_blkcg(struct bio *bio)
-{
- if (bio && bio->bi_blkg)
- return bio->bi_blkg->blkcg;
- return css_to_blkcg(blkcg_css());
-}
-
/**
* bio_issue_as_root_blkg - see if this bio needs to be issued as root blkg
* @return: true if this bio needs to be submitted with the root blkg context.
@@ -471,8 +450,6 @@ static inline int blkcg_activate_policy(struct request_queue *q,
static inline void blkcg_deactivate_policy(struct request_queue *q,
const struct blkcg_policy *pol) { }
-static inline struct blkcg *__bio_blkcg(struct bio *bio) { return NULL; }
-
static inline struct blkg_policy_data *blkg_to_pd(struct blkcg_gq *blkg,
struct blkcg_policy *pol) { return NULL; }
static inline struct blkcg_gq *pd_to_blkg(struct blkg_policy_data *pd) { return NULL; }
--
2.30.2
next prev parent reply other threads:[~2022-04-20 4:27 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-20 4:27 make the blkcg and blkcg structures private Christoph Hellwig
2022-04-20 4:27 ` Christoph Hellwig [this message]
2022-04-21 21:21 ` [PATCH 01/15] blk-cgroup: remove __bio_blkcg Tejun Heo
2022-04-20 4:27 ` [PATCH 02/15] nvme-fc: don't support the appid attribute without CONFIG_BLK_CGROUP_FC_APPID Christoph Hellwig
2022-04-20 4:27 ` [PATCH 03/15] nvme-fc: fold t fc_update_appid into fc_appid_store Christoph Hellwig
2022-04-20 4:27 ` [PATCH 04/15] blk-cgroup: move blkcg_{get,set}_fc_appid out of line Christoph Hellwig
2022-04-20 4:27 ` [PATCH 05/15] blk-cgroup: move blk_cgroup_congested out line Christoph Hellwig
2022-04-20 4:27 ` [PATCH 06/15] blk-cgroup: move blkcg_{pin,unpin}_online out of line Christoph Hellwig
2022-04-20 4:27 ` [PATCH 07/15] blk-cgroup: move struct blkcg to block/blk-cgroup.h Christoph Hellwig
2022-04-20 4:27 ` [PATCH 08/15] blktrace: cleanup the __trace_note_message interface Christoph Hellwig
2022-04-20 4:27 ` [PATCH 09/15] blk-cgroup: replace bio_blkcg with bio_blkcg_css Christoph Hellwig
2022-04-20 4:27 ` [PATCH 10/15] blk-cgroup: remove pointless CONFIG_BLOCK ifdefs Christoph Hellwig
2022-04-20 4:27 ` [PATCH 11/15] blk-cgroup: remove unneeded includes from <linux/blk-cgroup.h> Christoph Hellwig
2022-04-20 4:27 ` [PATCH 12/15] blk-cgroup: move blkcg_css to blk-cgroup.c Christoph Hellwig
2022-04-20 4:27 ` [PATCH 13/15] blk-cgroup: cleanup blk_cgroup_congested Christoph Hellwig
2022-04-20 4:27 ` [PATCH 14/15] blk-cgroup: cleanup blkcg_maybe_throttle_current Christoph Hellwig
2022-04-20 4:27 ` [PATCH 15/15] kthread: unexport kthread_blkcg Christoph Hellwig
2022-04-21 21:44 ` make the blkcg and blkcg structures private Tejun Heo
2022-04-22 4:23 ` Christoph Hellwig
2022-04-22 15:42 ` Tejun Heo
2022-05-02 16:46 ` Christoph Hellwig
2022-05-02 20:06 ` Jens Axboe
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