centos man page for bio_add_page

BIO_ADD_PAGE(9) 						   The Linux VFS						   BIO_ADD_PAGE(9)

NAME
       bio_add_page - attempt to add page to bio

SYNOPSIS
       int bio_add_page(struct bio * bio, struct page * page, unsigned int len, unsigned int offset);

ARGUMENTS
       bio
	   destination bio

       page
	   page to add

       len
	   vec entry length

       offset
	   vec entry offset

DESCRIPTION
       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 up to PAGE_SIZE, so it is always possible to add a single page to an empty bio.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014							   BIO_ADD_PAGE(9)