'\" t
.\"     Title: idr_replace
.\"    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: Basic Kernel Library Functions
.\"    Source: Kernel Hackers Manual 4.11.6
.\"  Language: English
.\"
.TH "IDR_REPLACE" "9" "July 2017" "Kernel Hackers Manual 4\&.11\&" "Basic Kernel Library Functions"
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.SH "NAME"
idr_replace \- replace pointer for given id
.SH "SYNOPSIS"
.HP \w'void\ *\ idr_replace('u
.BI "void * idr_replace(struct\ idr\ *\ " "idr" ", void\ *\ " "ptr" ", int\ " "id" ");"
.SH "ARGUMENTS"
.PP
\fIstruct idr * idr\fR
.RS 4
idr handle
.RE
.PP
\fIvoid * ptr\fR
.RS 4
New pointer to associate with the ID
.RE
.PP
\fIint id\fR
.RS 4
Lookup key
.RE
.SH "DESCRIPTION"
.PP
Replace the pointer registered with an ID and return the old value\&. This function can be called under the RCU read lock concurrently with
\fBidr_alloc\fR
and
\fBidr_remove\fR
(as long as the ID being removed is not the one being replaced!)\&.
.SH "RETURN"
.PP
0 on success\&.
\fB\-ENOENT\fR
indicates that
\fIid\fR
was not found\&.
\fB\-EINVAL\fR
indicates that
\fIid\fR
or
\fIptr\fR
were not valid\&.
.SH "COPYRIGHT"
.br