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authorMing Lei <ming.lei@redhat.com>2018-09-05 15:45:54 -0600
committerJens Axboe <axboe@kernel.dk>2018-09-06 15:12:24 -0600
commit7759eb23fd9808a2e4498cf36a798ed65cde78ae (patch)
tree5ff1a0f21a48ee3f1c4eae4c2dbc7dd084e59792 /crypto/842.c
parent3d0e63754fa47d65edff172c1156f44b6fca5ca1 (diff)
downloadlinux-7759eb23fd9808a2e4498cf36a798ed65cde78ae.tar.bz2
block: remove bio_rewind_iter()
It is pointed that bio_rewind_iter() is one very bad API[1]: 1) bio size may not be restored after rewinding 2) it causes some bogus change, such as 5151842b9d8732 (block: reset bi_iter.bi_done after splitting bio) 3) rewinding really makes things complicated wrt. bio splitting 4) unnecessary updating of .bi_done in fast path [1] https://marc.info/?t=153549924200005&r=1&w=2 So this patch takes Kent's suggestion to restore one bio into its original state via saving bio iterator(struct bvec_iter) in bio_integrity_prep(), given now bio_rewind_iter() is only used by bio integrity code. Cc: Dmitry Monakhov <dmonakhov@openvz.org> Cc: Hannes Reinecke <hare@suse.com> Suggested-by: Kent Overstreet <kent.overstreet@gmail.com> Acked-by: Kent Overstreet <kent.overstreet@gmail.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'crypto/842.c')
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