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| author | Ming Lei <ming.lei@redhat.com> | 2019-04-23 10:51:04 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2019-04-23 07:57:07 -0600 |
| commit | 551879a48f01826fd86568d7bd1e774cb0de3295 (patch) | |
| tree | 5278aedd731a02b77f5dbc3fc23553e34f8728a0 /mm/swapfile.c | |
| parent | 6c88d73515c444323c57fba9069456b819700e79 (diff) | |
| download | linux-551879a48f01826fd86568d7bd1e774cb0de3295.tar.bz2 | |
block: clarify that bio_add_page() and related helpers can add multi pages
bio_add_page() and __bio_add_page() are capable of adding pages into
bio, and now we have at least two such usages alreay:
- __bio_iov_bvec_add_pages()
- nvmet_bdev_execute_rw().
So update comments on these two helpers.
The thing is a bit special for __bio_try_merge_page(), given the caller
needs to know if the new added page is same with the last added page,
then it isn't safe to pass multi-page in case that 'same_page' is true,
so adds warning on potential misuse, and updates comment on
__bio_try_merge_page().
Cc: linux-xfs@vger.kernel.org
Cc: linux-fsdevel@vger.kernel.org
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'mm/swapfile.c')
0 files changed, 0 insertions, 0 deletions