Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 28e89fd9 authored by Jens Axboe's avatar Jens Axboe
Browse files

block: add bioset_init_from_src() helper 



Add a helper that allows a caller to initialize a new bio_set,
using the settings from an existing bio_set.

Reported-by: default avatarVenkat R.B <vrbagal1@linux.vnet.ibm.com>
Tested-by: default avatarVenkat R.B <vrbagal1@linux.vnet.ibm.com>
Tested-by: default avatarLi Wang <liwang@redhat.com>
Reviewed-by: default avatarMike Snitzer <snitzer@redhat.com>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent c04fa44b

block/bio.c

+18 −0
Original line number Diff line number Diff line
@@ -1967,6 +1967,24 @@ int bioset_init(struct bio_set *bs, 
}

EXPORT_SYMBOL(bioset_init);



/*

 * Initialize and setup a new bio_set, based on the settings from

 * another bio_set.

 */

int bioset_init_from_src(struct bio_set *bs, struct bio_set *src)

{

	int flags;



	flags = 0;

	if (src->bvec_pool.min_nr)

		flags |= BIOSET_NEED_BVECS;

	if (src->rescue_workqueue)

		flags |= BIOSET_NEED_RESCUER;



	return bioset_init(bs, src->bio_pool.min_nr, src->front_pad, flags);

}

EXPORT_SYMBOL(bioset_init_from_src);



#ifdef CONFIG_BLK_CGROUP



/**

include/linux/bio.h

+1 −0
Original line number Diff line number Diff line
@@ -417,6 +417,7 @@ enum { 
extern int bioset_init(struct bio_set *, unsigned int, unsigned int, int flags);

extern void bioset_exit(struct bio_set *);

extern int biovec_init_pool(mempool_t *pool, int pool_entries);

extern int bioset_init_from_src(struct bio_set *bs, struct bio_set *src);



extern struct bio *bio_alloc_bioset(gfp_t, unsigned int, struct bio_set *);

extern void bio_put(struct bio *);