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block: Add missing flush_dcache_page() call

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Since a bio can point to userspace pages (e.g. direct IO), this is
generally necessary.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Kent Overstreet 2018-05-08 21:33:55 -04:00 committed by Jens Axboe
parent 45db54d58d
commit 6e6e811d74
1 changed files with 2 additions and 0 deletions
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block/bio.c
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@ -994,6 +994,8 @@ void bio_copy_data_iter(struct bio *dst, struct bvec_iter *dst_iter,
kunmap_atomic(dst_p); kunmap_atomic(dst_p);
kunmap_atomic(src_p); kunmap_atomic(src_p);
flush_dcache_page(dst_bv.bv_page);
bio_advance_iter(src, src_iter, bytes); bio_advance_iter(src, src_iter, bytes);
bio_advance_iter(dst, dst_iter, bytes); bio_advance_iter(dst, dst_iter, bytes);
} }