bio_add_pc_page — attempt to add page to bio
int bio_add_pc_page ( | struct request_queue * | q, |
| struct bio * | bio, | |
| struct page * | page, | |
| unsigned int | len, | |
| unsigned int | offset); |
qthe target queue
biodestination bio
pagepage to add
lenvec entry length
offsetvec entry offset
Attempt to add a page to the bio_vec maplist. This can fail for a number of reasons, such as the bio being full or target block device limitations. The target block device must allow bio's smaller than PAGE_SIZE, so it is always possible to add a single page to an empty bio. This should only be used by REQ_PC bios.