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block: make blkcg_punt_bio_submit optional

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Guard all the code to punt bios to a per-cgroup submission helper by a
new CONFIG_BLK_CGROUP_PUNT_BIO symbol that is selected by btrfs.
This way non-btrfs kernel builds don't need to have this code.

Reviewed-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Christoph Hellwig
2023-03-27 09:49:53 +09:00
committed by David Sterba
parent 12be09fe18
commit 2c275afeb6
4 changed files with 48 additions and 36 deletions
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3
block/blk-cgroup.h
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@@ -72,9 +72,10 @@ struct blkcg_gq {
struct blkg_iostat_set iostat;
struct blkg_policy_data *pd[BLKCG_MAX_POLS];
#ifdef CONFIG_BLK_CGROUP_PUNT_BIO
spinlock_t async_bio_lock;
struct bio_list async_bios;
#endif
union {
struct work_struct async_bio_work;
struct work_struct free_work;