'\" t
.\"     Title: find_lock_entry
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: April 2019
.\"    Manual: Memory Management in Linux
.\"    Source: Kernel Hackers Manual 4.9.168
.\"  Language: English
.\"
.TH "FIND_LOCK_ENTRY" "9" "April 2019" "Kernel Hackers Manual 4\&.9\&." "Memory Management in Linux"
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.SH "NAME"
find_lock_entry \- locate, pin and lock a page cache entry
.SH "SYNOPSIS"
.HP \w'struct\ page\ *\ find_lock_entry('u
.BI "struct page * find_lock_entry(struct\ address_space\ *\ " "mapping" ", pgoff_t\ " "offset" ");"
.SH "ARGUMENTS"
.PP
\fImapping\fR
.RS 4
the address_space to search
.RE
.PP
\fIoffset\fR
.RS 4
the page cache index
.RE
.SH "DESCRIPTION"
.PP
Looks up the page cache slot at
\fImapping\fR
&
\fIoffset\fR\&. If there is a page cache page, it is returned locked and with an increased refcount\&.
.PP
If the slot holds a shadow entry of a previously evicted page, or a swap entry from shmem/tmpfs, it is returned\&.
.PP
Otherwise,
\fBNULL\fR
is returned\&.
.PP
\fBfind_lock_entry\fR
may sleep\&.
.SH "COPYRIGHT"
.br