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blk: replace bioset_create_nobvec() with a flags arg to bioset_create()

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"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>
This commit is contained in:
NeilBrown 2017-06-18 14:38:57 +10:00 • committed by Jens Axboe
parent af67c31fba
commit 011067b056
18 changed files with 45 additions and 57 deletions
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2
fs/block_dev.c
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@ -439,7 +439,7 @@ blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
static __init int blkdev_init(void)
{
blkdev_dio_pool = bioset_create(4, offsetof(struct blkdev_dio, bio));
blkdev_dio_pool = bioset_create(4, offsetof(struct blkdev_dio, bio), BIOSET_NEED_BVECS);
if (!blkdev_dio_pool)
return -ENOMEM;
return 0;