diff options
| author | NeilBrown <neilb@suse.com> | 2017-06-18 06:38:57 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2017-06-18 20:40:59 +0200 |
| commit | 011067b05668b05aae88e5a24cff0ca0a67ca0b0 (patch) | |
| tree | b56fb4114e8bd71ffd36520f1b4cf7e4e49f1c79 /include | |
| parent | blk: remove bio_set arg from blk_queue_split() (diff) | |
| download | linux-011067b05668b05aae88e5a24cff0ca0a67ca0b0.tar.xz linux-011067b05668b05aae88e5a24cff0ca0a67ca0b0.zip | |
blk: replace bioset_create_nobvec() with a flags arg to bioset_create()
"flags" arguments are often seen as good API design as they allow
easy extensibility.
bioset_create_nobvec() is implemented internally as a variation in
flags passed to __bioset_create().
To support future extension, make the internal structure part of the
API.
i.e. add a 'flags' argument to bioset_create() and discard
bioset_create_nobvec().
Note that the bio_split allocations in drivers/md/raid* do not need
the bvec mempool - they should have used bioset_create_nobvec().
Suggested-by: Christoph Hellwig <hch@infradead.org>
Reviewed-by: Christoph Hellwig <hch@infradead.org>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/bio.h | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/include/linux/bio.h b/include/linux/bio.h index 9455aada1399..985dc645637e 100644 --- a/include/linux/bio.h +++ b/include/linux/bio.h @@ -373,8 +373,10 @@ static inline struct bio *bio_next_split(struct bio *bio, int sectors, return bio_split(bio, sectors, gfp, bs); } -extern struct bio_set *bioset_create(unsigned int, unsigned int); -extern struct bio_set *bioset_create_nobvec(unsigned int, unsigned int); +extern struct bio_set *bioset_create(unsigned int, unsigned int, int flags); +enum { + BIOSET_NEED_BVECS = BIT(0), +}; extern void bioset_free(struct bio_set *); extern mempool_t *biovec_create_pool(int pool_entries); |