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author | Kent Overstreet <kmo@daterainc.com> | 2013-09-24 16:26:05 -0700 |
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committer | Kent Overstreet <kmo@daterainc.com> | 2013-11-23 22:33:51 -0800 |
commit | 458b76ed2f9517becb74dcc8eedd70d3068ea6e4 (patch) | |
tree | b01b2150b197e0759b3ba59c0f9367d4477ebb8c /fs | |
parent | d57a5f7c6605f15f3b5134837e68b448a7cea88e (diff) | |
download | op-kernel-dev-458b76ed2f9517becb74dcc8eedd70d3068ea6e4.zip op-kernel-dev-458b76ed2f9517becb74dcc8eedd70d3068ea6e4.tar.gz |
block: Kill bio_segments()/bi_vcnt usage
When we start sharing biovecs, keeping bi_vcnt accurate for splits is
going to be error prone - and unnecessary, if we refactor some code.
So bio_segments() has to go - but most of the existing users just needed
to know if the bio had multiple segments, which is easier - add a
bio_multiple_segments() for them.
(Two of the current uses of bio_segments() are going to go away in a
couple patches, but the current implementation of bio_segments() is
unsafe as soon as we start doing driver conversions for immutable
biovecs - so implement a dumb version for bisectability, it'll go away
in a couple patches)
Signed-off-by: Kent Overstreet <kmo@daterainc.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Neil Brown <neilb@suse.de>
Cc: Nagalakshmi Nandigama <Nagalakshmi.Nandigama@lsi.com>
Cc: Sreekanth Reddy <Sreekanth.Reddy@lsi.com>
Cc: "James E.J. Bottomley" <JBottomley@parallels.com>
Diffstat (limited to 'fs')
-rw-r--r-- | fs/bio.c | 2 |
1 files changed, 1 insertions, 1 deletions
@@ -1733,7 +1733,7 @@ struct bio_pair *bio_split(struct bio *bi, int first_sectors) trace_block_split(bdev_get_queue(bi->bi_bdev), bi, bi->bi_iter.bi_sector + first_sectors); - BUG_ON(bio_segments(bi) > 1); + BUG_ON(bio_multiple_segments(bi)); atomic_set(&bp->cnt, 3); bp->error = 0; bp->bio1 = *bi; |