'\" t
.\"     Title: pagecache_get_page
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: January 2017
.\"    Manual: Memory Management in Linux
.\"    Source: Kernel Hackers Manual 4.8.15
.\"  Language: English
.\"
.TH "PAGECACHE_GET_PAGE" "9" "January 2017" "Kernel Hackers Manual 4\&.8\&." "Memory Management in Linux"
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.SH "NAME"
pagecache_get_page \- find and get a page reference
.SH "SYNOPSIS"
.HP \w'struct\ page\ *\ pagecache_get_page('u
.BI "struct page * pagecache_get_page(struct\ address_space\ *\ " "mapping" ", pgoff_t\ " "offset" ", int\ " "fgp_flags" ", gfp_t\ " "gfp_mask" ");"
.SH "ARGUMENTS"
.PP
\fImapping\fR
.RS 4
the address_space to search
.RE
.PP
\fIoffset\fR
.RS 4
the page index
.RE
.PP
\fIfgp_flags\fR
.RS 4
PCG flags
.RE
.PP
\fIgfp_mask\fR
.RS 4
gfp mask to use for the page cache data page allocation
.RE
.SH "DESCRIPTION"
.PP
Looks up the page cache slot at
\fImapping\fR
&
\fIoffset\fR\&.
.PP
PCG flags modify how the page is returned\&.
.PP
FGP_ACCESSED: the page will be marked accessed FGP_LOCK: Page is return locked FGP_CREAT: If page is not present then a new page is allocated using
\fIgfp_mask\fR
and added to the page cache and the VM\*(Aqs LRU list\&. The page is returned locked and with an increased refcount\&. Otherwise,
\fBNULL\fR
is returned\&.
.PP
If FGP_LOCK or FGP_CREAT are specified then the function may sleep even if the GFP flags specified for FGP_CREAT are atomic\&.
.PP
If there is a page cache page, it is returned with an increased refcount\&.
.SH "COPYRIGHT"
.br