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| author | Ming Lei <ming.lei@redhat.com> | 2018-09-05 15:45:54 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-09-06 15:12:24 -0600 |
| commit | 7759eb23fd9808a2e4498cf36a798ed65cde78ae (patch) | |
| tree | 5ff1a0f21a48ee3f1c4eae4c2dbc7dd084e59792 /kernel/sys_ni.c | |
| parent | 3d0e63754fa47d65edff172c1156f44b6fca5ca1 (diff) | |
| download | linux-stable-7759eb23fd9808a2e4498cf36a798ed65cde78ae.tar.gz linux-stable-7759eb23fd9808a2e4498cf36a798ed65cde78ae.tar.bz2 linux-stable-7759eb23fd9808a2e4498cf36a798ed65cde78ae.zip | |
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 'kernel/sys_ni.c')
0 files changed, 0 insertions, 0 deletions