| Message ID | 20170626121034.3051-10-ming.lei@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
diff --git a/block/bio.c b/block/bio.c index a5db117e8dfa..bf7f25889f6e 100644 --- a/block/bio.c +++ b/block/bio.c @@ -870,6 +870,10 @@ EXPORT_SYMBOL(bio_add_page); * * Pins as many pages from *iter and appends them to @bio's bvec array. The * pages will have to be released using put_page() when done. + * + * The hacking way of using bvec table as page pointer array is safe + * even after multipage bvec is introduced because that space can be + * thought as unused by bio_add_page(). */ int bio_iov_iter_get_pages(struct bio *bio, struct iov_iter *iter) {
bio_iov_iter_get_pages() used unused bvec spaces for storing page pointer array temporarily, and this patch comments on this usage wrt. multipage bvec support. Signed-off-by: Ming Lei <ming.lei@redhat.com> --- block/bio.c | 4 ++++ 1 file changed, 4 insertions(+)