'\" t
.\"     Title: replace_page_cache_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 "REPLACE_PAGE_CACHE_P" "9" "January 2017" "Kernel Hackers Manual 4\&.8\&." "Memory Management in Linux"
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.SH "NAME"
replace_page_cache_page \- replace a pagecache page with a new one
.SH "SYNOPSIS"
.HP \w'int\ replace_page_cache_page('u
.BI "int replace_page_cache_page(struct\ page\ *\ " "old" ", struct\ page\ *\ " "new" ", gfp_t\ " "gfp_mask" ");"
.SH "ARGUMENTS"
.PP
\fIold\fR
.RS 4
page to be replaced
.RE
.PP
\fInew\fR
.RS 4
page to replace with
.RE
.PP
\fIgfp_mask\fR
.RS 4
allocation mode
.RE
.SH "DESCRIPTION"
.PP
This function replaces a page in the pagecache with a new one\&. On success it acquires the pagecache reference for the new page and drops it for the old page\&. Both the old and new pages must be locked\&. This function does not add the new page to the LRU, the caller must do that\&.
.PP
The remove + add is atomic\&. The only way this function can fail is memory allocation failure\&.
.SH "COPYRIGHT"
.br