'\" t
.\"     Title: bio_add_pc_page
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: July 2017
.\"    Manual: The Linux VFS
.\"    Source: Kernel Hackers Manual 4.12.2
.\"  Language: English
.\"
.TH "BIO_ADD_PC_PAGE" "9" "July 2017" "Kernel Hackers Manual 4\&.12\&" "The Linux VFS"
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.el       .ds Aq '
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.SH "NAME"
bio_add_pc_page \- attempt to add page to bio
.SH "SYNOPSIS"
.HP \w'int\ bio_add_pc_page('u
.BI "int bio_add_pc_page(struct\ request_queue\ *\ " "q" ", struct\ bio\ *\ " "bio" ", struct\ page\ *\ " "page" ", unsigned\ int\ " "len" ", unsigned\ int\ " "offset" ");"
.SH "ARGUMENTS"
.PP
\fIstruct request_queue * q\fR
.RS 4
the target queue
.RE
.PP
\fIstruct bio * bio\fR
.RS 4
destination bio
.RE
.PP
\fIstruct page * page\fR
.RS 4
page to add
.RE
.PP
\fIunsigned int len\fR
.RS 4
vec entry length
.RE
.PP
\fIunsigned int offset\fR
.RS 4
vec entry offset
.RE
.SH "DESCRIPTION"
.PP
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\*(Aqs up to PAGE_SIZE, so it is always possible to add a single page to an empty bio\&.
.PP
This should only be used by REQ_PC bios\&.
.SH "COPYRIGHT"
.br