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blk-cgroup: remove the !bio->bi_blkg check in blkcg_bio_issue_check

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This is purely a sanity check for grave programming errors.  Remove it
to simplify further work in this area.

Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2020-06-27 09:31:55 +02:00 committed by Jens Axboe
parent 13c7863d48
commit 81630e27ff
1 changed files with 1 additions and 14 deletions
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15
include/linux/blk-cgroup.h
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@ -543,24 +543,11 @@ static inline void blkcg_bio_issue_init(struct bio *bio)
static inline bool blkcg_bio_issue_check(struct request_queue *q, static inline bool blkcg_bio_issue_check(struct request_queue *q,
struct bio *bio) struct bio *bio)
{ {
struct blkcg_gq *blkg; struct blkcg_gq *blkg = bio->bi_blkg;
bool throtl = false; bool throtl = false;
rcu_read_lock(); rcu_read_lock();
if (!bio->bi_blkg) {
char b[BDEVNAME_SIZE];
WARN_ONCE(1,
"no blkg associated for bio on block-device: %s\n",
bio_devname(bio, b));
bio_associate_blkg(bio);
}
blkg = bio->bi_blkg;
throtl = blk_throtl_bio(q, blkg, bio); throtl = blk_throtl_bio(q, blkg, bio);
if (!throtl) { if (!throtl) {
struct blkg_iostat_set *bis; struct blkg_iostat_set *bis;
int rwd, cpu; int rwd, cpu;