centos man page for bio_add_pc_page

BIO_ADD_PC_PAGE(9)						   The Linux VFS						BIO_ADD_PC_PAGE(9)

NAME
       bio_add_pc_page - attempt to add page to bio

SYNOPSIS
       int bio_add_pc_page(struct request_queue * q, struct bio * bio, struct page * page, unsigned int len, unsigned int offset);

ARGUMENTS
       q
	   the target queue

       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.

       This should only be used by REQ_PC bios.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014							BIO_ADD_PC_PAGE(9)