tree 572a04efee9750a118a43579fef0381dd9997461
parent ddad8dd0a162fde61646a627a3017c258601dc8a
author Christoph Hellwig <hch@lst.de> 1421594190 +0100
committer Jens Axboe <axboe@fb.com> 1423153839 -0700

block: add a helper to free bio bounce buffer pages

The code sniplet to walk all bio_vecs and free their pages is opencoded in
way to many places, so factor it into a helper.  Also convert the slightly
more complex cases in bio_kern_endio and __bio_copy_iov where we break
the freeing from an existing loop into a separate one.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Jens Axboe <axboe@fb.com>