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block: Allow using bio_attempt_back_merge() internally

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Remove "static" from the definition of bio_attempt_back_merge() and
declare this function in block/blk.h to allow using it internally from
other block layer files. The definition of enum bio_merge_status is
also moved to block/blk.h.

Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Tested-by: Hans Holmberg <hans.holmberg@wdc.com>
Tested-by: Dennis Maisenbacher <dennis.maisenbacher@wdc.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Link: https://lore.kernel.org/r/20240408014128.205141-6-dlemoal@kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Damien Le Moal 2024-04-08 10:41:05 +09:00 committed by Jens Axboe
parent b85a3c1b79
commit dd850ff3ee
2 changed files with 9 additions and 7 deletions
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8
block/blk-merge.c
View File

@ -972,13 +972,7 @@ static void blk_account_io_merge_bio(struct request *req)
part_stat_unlock();
}
enum bio_merge_status {
BIO_MERGE_OK,
BIO_MERGE_NONE,
BIO_MERGE_FAILED,
};
static enum bio_merge_status bio_attempt_back_merge(struct request *req,
enum bio_merge_status bio_attempt_back_merge(struct request *req,
struct bio *bio, unsigned int nr_segs)
{
const blk_opf_t ff = bio_failfast(bio);

8
block/blk.h
View File

@ -269,6 +269,14 @@ static inline void bio_integrity_free(struct bio *bio)
unsigned long blk_rq_timeout(unsigned long timeout);
void blk_add_timer(struct request *req);
enum bio_merge_status {
BIO_MERGE_OK,
BIO_MERGE_NONE,
BIO_MERGE_FAILED,
};
enum bio_merge_status bio_attempt_back_merge(struct request *req,
struct bio *bio, unsigned int nr_segs);
bool blk_attempt_plug_merge(struct request_queue *q, struct bio *bio,
unsigned int nr_segs);
bool blk_bio_list_merge(struct request_queue *q, struct list_head *list,