'\" t
.\"     Title: blk_queue_bounce_limit
.\"    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: Block Devices
.\"    Source: Kernel Hackers Manual 4.9.168
.\"  Language: English
.\"
.TH "BLK_QUEUE_BOUNCE_LIM" "9" "April 2019" "Kernel Hackers Manual 4\&.9\&." "Block Devices"
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.SH "NAME"
blk_queue_bounce_limit \- set bounce buffer limit for queue
.SH "SYNOPSIS"
.HP \w'void\ blk_queue_bounce_limit('u
.BI "void blk_queue_bounce_limit(struct\ request_queue\ *\ " "q" ", u64\ " "max_addr" ");"
.SH "ARGUMENTS"
.PP
\fIq\fR
.RS 4
the request queue for the device
.RE
.PP
\fImax_addr\fR
.RS 4
the maximum address the device can handle
.RE
.SH "DESCRIPTION"
.PP
Different hardware can have different requirements as to what pages it can do I/O directly to\&. A low level driver can call blk_queue_bounce_limit to have lower memory pages allocated as bounce buffers for doing I/O to pages residing above
\fImax_addr\fR\&.
.SH "COPYRIGHT"
.br