'\" t
.\"     Title: read_cache_page
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
.\"      Date: May 2018
.\"    Manual: Memory Management in Linux
.\"    Source: Kernel Hackers Manual 3.16.56
.\"  Language: English
.\"
.TH "READ_CACHE_PAGE" "9" "May 2018" "Kernel Hackers Manual 3\&.16\&" "Memory Management in Linux"
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.nh
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.SH "NAME"
read_cache_page \- read into page cache, fill it if needed
.SH "SYNOPSIS"
.HP \w'struct\ page\ *\ read_cache_page('u
.BI "struct page * read_cache_page(struct\ address_space\ *\ " "mapping" ", pgoff_t\ " "index" ", int\ (*" "filler" ")\ (void\ *,\ struct\ page\ *), void\ *\ " "data" ");"
.SH "ARGUMENTS"
.PP
\fImapping\fR
.RS 4
the page\*(Aqs address_space
.RE
.PP
\fIindex\fR
.RS 4
the page index
.RE
.PP
\fIfiller\fR
.RS 4
function to perform the read
.RE
.PP
\fIdata\fR
.RS 4
first arg to filler(data, page) function, often left as NULL
.RE
.SH "DESCRIPTION"
.PP
Read into the page cache\&. If a page already exists, and
\fBPageUptodate\fR
is not set, try to fill the page and wait for it to become unlocked\&.
.PP
If the page does not get brought uptodate, return \-EIO\&.
.SH "COPYRIGHT"
.br