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authorDennis Zhou <dennis@kernel.org>2018-12-05 20:10:31 +0300
committerJens Axboe <axboe@kernel.dk>2018-12-08 08:26:37 +0300
commit5cdf2e3fea5ee37b66842d76a9b06e6dac0b933d (patch)
treeb460ef1ba02562982e2f000e704ce7214be4d5f3 /block/bio.c
parent892ad71f622bbf39c6de321d5ca9b0fdec237c24 (diff)
downloadlinux-5cdf2e3fea5ee37b66842d76a9b06e6dac0b933d.tar.xz
blkcg: associate blkg when associating a device
Previously, blkg association was handled by controller specific code in blk-throttle and blk-iolatency. However, because a blkg represents a relationship between a blkcg and a request_queue, it makes sense to keep the blkg->q and bio->bi_disk->queue consistent. This patch moves association into the bio_set_dev macro(). This should cover the majority of cases where the device is set/changed keeping the two pointers consistent. Fallback code is added to blkcg_bio_issue_check() to catch any missing paths. Signed-off-by: Dennis Zhou <dennis@kernel.org> Reviewed-by: Josef Bacik <josef@toxicpanda.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/bio.c')
-rw-r--r--block/bio.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/block/bio.c b/block/bio.c
index 41ebb3f8e2fc..1e852ab904aa 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -2074,6 +2074,7 @@ void bio_associate_blkg(struct bio *bio)
rcu_read_unlock();
}
+EXPORT_SYMBOL_GPL(bio_associate_blkg);
/**
* bio_disassociate_task - undo bio_associate_current()