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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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drivers/block/drbd/drbd_main.c
+1 -1
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@@ -2165,7 +2165,7 @@ static int drbd_create_mempools(void)
goto Enomem;
/* mempools */
drbd_md_io_bio_set = bioset_create(DRBD_MIN_POOL_PAGES, 0);
drbd_md_io_bio_set = bioset_create(DRBD_MIN_POOL_PAGES, 0, BIOSET_NEED_BVECS);
if (drbd_md_io_bio_set == NULL)
goto Enomem;