mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-25 05:34:00 +08:00
402d326519
Present backing device capabilities for MTD character device files to allow NOMMU mmap to do direct mapping where possible. Signed-off-by: David Howells <dhowells@redhat.com> Tested-by: Bernd Schmidt <bernd.schmidt@analog.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
44 lines
1.4 KiB
C
44 lines
1.4 KiB
C
/* MTD backing device capabilities
|
|
*
|
|
* Copyright © 2006 Red Hat, Inc. All Rights Reserved.
|
|
* Written by David Howells (dhowells@redhat.com)
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*/
|
|
|
|
#include <linux/backing-dev.h>
|
|
#include <linux/mtd/mtd.h>
|
|
#include "internal.h"
|
|
|
|
/*
|
|
* backing device capabilities for non-mappable devices (such as NAND flash)
|
|
* - permits private mappings, copies are taken of the data
|
|
*/
|
|
struct backing_dev_info mtd_bdi_unmappable = {
|
|
.capabilities = BDI_CAP_MAP_COPY,
|
|
};
|
|
|
|
/*
|
|
* backing device capabilities for R/O mappable devices (such as ROM)
|
|
* - permits private mappings, copies are taken of the data
|
|
* - permits non-writable shared mappings
|
|
*/
|
|
struct backing_dev_info mtd_bdi_ro_mappable = {
|
|
.capabilities = (BDI_CAP_MAP_COPY | BDI_CAP_MAP_DIRECT |
|
|
BDI_CAP_EXEC_MAP | BDI_CAP_READ_MAP),
|
|
};
|
|
|
|
/*
|
|
* backing device capabilities for writable mappable devices (such as RAM)
|
|
* - permits private mappings, copies are taken of the data
|
|
* - permits non-writable shared mappings
|
|
*/
|
|
struct backing_dev_info mtd_bdi_rw_mappable = {
|
|
.capabilities = (BDI_CAP_MAP_COPY | BDI_CAP_MAP_DIRECT |
|
|
BDI_CAP_EXEC_MAP | BDI_CAP_READ_MAP |
|
|
BDI_CAP_WRITE_MAP),
|
|
};
|