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-rw-r--r--drivers/mtd/Makefile2
-rw-r--r--drivers/mtd/internal.h17
-rw-r--r--drivers/mtd/mtdbdi.c43
-rw-r--r--drivers/mtd/mtdcore.c79
-rw-r--r--drivers/mtd/mtdsuper.c2
5 files changed, 77 insertions, 66 deletions
diff --git a/drivers/mtd/Makefile b/drivers/mtd/Makefile
index 82d1e4de475b..4521b1ecce45 100644
--- a/drivers/mtd/Makefile
+++ b/drivers/mtd/Makefile
@@ -4,7 +4,7 @@
4 4
5# Core functionality. 5# Core functionality.
6obj-$(CONFIG_MTD) += mtd.o 6obj-$(CONFIG_MTD) += mtd.o
7mtd-y := mtdcore.o mtdsuper.o mtdbdi.o 7mtd-y := mtdcore.o mtdsuper.o
8mtd-$(CONFIG_MTD_PARTITIONS) += mtdpart.o 8mtd-$(CONFIG_MTD_PARTITIONS) += mtdpart.o
9 9
10obj-$(CONFIG_MTD_CONCAT) += mtdconcat.o 10obj-$(CONFIG_MTD_CONCAT) += mtdconcat.o
diff --git a/drivers/mtd/internal.h b/drivers/mtd/internal.h
index c658fe7216b5..e69de29bb2d1 100644
--- a/drivers/mtd/internal.h
+++ b/drivers/mtd/internal.h
@@ -1,17 +0,0 @@
1/* Internal MTD definitions
2 *
3 * Copyright © 2006 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
11
12/*
13 * mtdbdi.c
14 */
15extern struct backing_dev_info mtd_bdi_unmappable;
16extern struct backing_dev_info mtd_bdi_ro_mappable;
17extern struct backing_dev_info mtd_bdi_rw_mappable;
diff --git a/drivers/mtd/mtdbdi.c b/drivers/mtd/mtdbdi.c
index 5ca5aed0b225..e69de29bb2d1 100644
--- a/drivers/mtd/mtdbdi.c
+++ b/drivers/mtd/mtdbdi.c
@@ -1,43 +0,0 @@
1/* MTD backing device capabilities
2 *
3 * Copyright © 2006 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
11
12#include <linux/backing-dev.h>
13#include <linux/mtd/mtd.h>
14#include "internal.h"
15
16/*
17 * backing device capabilities for non-mappable devices (such as NAND flash)
18 * - permits private mappings, copies are taken of the data
19 */
20struct backing_dev_info mtd_bdi_unmappable = {
21 .capabilities = BDI_CAP_MAP_COPY,
22};
23
24/*
25 * backing device capabilities for R/O mappable devices (such as ROM)
26 * - permits private mappings, copies are taken of the data
27 * - permits non-writable shared mappings
28 */
29struct backing_dev_info mtd_bdi_ro_mappable = {
30 .capabilities = (BDI_CAP_MAP_COPY | BDI_CAP_MAP_DIRECT |
31 BDI_CAP_EXEC_MAP | BDI_CAP_READ_MAP),
32};
33
34/*
35 * backing device capabilities for writable mappable devices (such as RAM)
36 * - permits private mappings, copies are taken of the data
37 * - permits non-writable shared mappings
38 */
39struct backing_dev_info mtd_bdi_rw_mappable = {
40 .capabilities = (BDI_CAP_MAP_COPY | BDI_CAP_MAP_DIRECT |
41 BDI_CAP_EXEC_MAP | BDI_CAP_READ_MAP |
42 BDI_CAP_WRITE_MAP),
43};
diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c
index 5b38b17d2229..b177e750efc3 100644
--- a/drivers/mtd/mtdcore.c
+++ b/drivers/mtd/mtdcore.c
@@ -2,6 +2,9 @@
2 * Core registration and callback routines for MTD 2 * Core registration and callback routines for MTD
3 * drivers and users. 3 * drivers and users.
4 * 4 *
5 * bdi bits are:
6 * Copyright © 2006 Red Hat, Inc. All Rights Reserved.
7 * Written by David Howells (dhowells@redhat.com)
5 */ 8 */
6 9
7#include <linux/module.h> 10#include <linux/module.h>
@@ -16,11 +19,39 @@
16#include <linux/init.h> 19#include <linux/init.h>
17#include <linux/mtd/compatmac.h> 20#include <linux/mtd/compatmac.h>
18#include <linux/proc_fs.h> 21#include <linux/proc_fs.h>
22#include <linux/backing-dev.h>
19 23
20#include <linux/mtd/mtd.h> 24#include <linux/mtd/mtd.h>
21#include "internal.h"
22 25
23#include "mtdcore.h" 26#include "mtdcore.h"
27/*
28 * backing device capabilities for non-mappable devices (such as NAND flash)
29 * - permits private mappings, copies are taken of the data
30 */
31struct backing_dev_info mtd_bdi_unmappable = {
32 .capabilities = BDI_CAP_MAP_COPY,
33};
34
35/*
36 * backing device capabilities for R/O mappable devices (such as ROM)
37 * - permits private mappings, copies are taken of the data
38 * - permits non-writable shared mappings
39 */
40struct backing_dev_info mtd_bdi_ro_mappable = {
41 .capabilities = (BDI_CAP_MAP_COPY | BDI_CAP_MAP_DIRECT |
42 BDI_CAP_EXEC_MAP | BDI_CAP_READ_MAP),
43};
44
45/*
46 * backing device capabilities for writable mappable devices (such as RAM)
47 * - permits private mappings, copies are taken of the data
48 * - permits non-writable shared mappings
49 */
50struct backing_dev_info mtd_bdi_rw_mappable = {
51 .capabilities = (BDI_CAP_MAP_COPY | BDI_CAP_MAP_DIRECT |
52 BDI_CAP_EXEC_MAP | BDI_CAP_READ_MAP |
53 BDI_CAP_WRITE_MAP),
54};
24 55
25static int mtd_cls_suspend(struct device *dev, pm_message_t state); 56static int mtd_cls_suspend(struct device *dev, pm_message_t state);
26static int mtd_cls_resume(struct device *dev); 57static int mtd_cls_resume(struct device *dev);
@@ -628,20 +659,55 @@ done:
628/*====================================================================*/ 659/*====================================================================*/
629/* Init code */ 660/* Init code */
630 661
662static int __init mtd_bdi_init(struct backing_dev_info *bdi, const char *name)
663{
664 int ret;
665
666 ret = bdi_init(bdi);
667 if (!ret)
668 ret = bdi_register(bdi, NULL, name);
669
670 if (ret)
671 bdi_destroy(bdi);
672
673 return ret;
674}
675
631static int __init init_mtd(void) 676static int __init init_mtd(void)
632{ 677{
633 int ret; 678 int ret;
679
634 ret = class_register(&mtd_class); 680 ret = class_register(&mtd_class);
681 if (ret)
682 goto err_reg;
683
684 ret = mtd_bdi_init(&mtd_bdi_unmappable, "mtd-unmap");
685 if (ret)
686 goto err_bdi1;
687
688 ret = mtd_bdi_init(&mtd_bdi_ro_mappable, "mtd-romap");
689 if (ret)
690 goto err_bdi2;
691
692 ret = mtd_bdi_init(&mtd_bdi_rw_mappable, "mtd-rwmap");
693 if (ret)
694 goto err_bdi3;
635 695
636 if (ret) {
637 pr_err("Error registering mtd class: %d\n", ret);
638 return ret;
639 }
640#ifdef CONFIG_PROC_FS 696#ifdef CONFIG_PROC_FS
641 if ((proc_mtd = create_proc_entry( "mtd", 0, NULL ))) 697 if ((proc_mtd = create_proc_entry( "mtd", 0, NULL )))
642 proc_mtd->read_proc = mtd_read_proc; 698 proc_mtd->read_proc = mtd_read_proc;
643#endif /* CONFIG_PROC_FS */ 699#endif /* CONFIG_PROC_FS */
644 return 0; 700 return 0;
701
702err_bdi3:
703 bdi_destroy(&mtd_bdi_ro_mappable);
704err_bdi2:
705 bdi_destroy(&mtd_bdi_unmappable);
706err_bdi1:
707 class_unregister(&mtd_class);
708err_reg:
709 pr_err("Error registering mtd class or bdi: %d\n", ret);
710 return ret;
645} 711}
646 712
647static void __exit cleanup_mtd(void) 713static void __exit cleanup_mtd(void)
@@ -651,6 +717,9 @@ static void __exit cleanup_mtd(void)
651 remove_proc_entry( "mtd", NULL); 717 remove_proc_entry( "mtd", NULL);
652#endif /* CONFIG_PROC_FS */ 718#endif /* CONFIG_PROC_FS */
653 class_unregister(&mtd_class); 719 class_unregister(&mtd_class);
720 bdi_destroy(&mtd_bdi_unmappable);
721 bdi_destroy(&mtd_bdi_ro_mappable);
722 bdi_destroy(&mtd_bdi_rw_mappable);
654} 723}
655 724
656module_init(init_mtd); 725module_init(init_mtd);
diff --git a/drivers/mtd/mtdsuper.c b/drivers/mtd/mtdsuper.c
index af8b42e0a55b..7c003191fca4 100644
--- a/drivers/mtd/mtdsuper.c
+++ b/drivers/mtd/mtdsuper.c
@@ -13,6 +13,7 @@
13#include <linux/mtd/super.h> 13#include <linux/mtd/super.h>
14#include <linux/namei.h> 14#include <linux/namei.h>
15#include <linux/ctype.h> 15#include <linux/ctype.h>
16#include <linux/slab.h>
16 17
17/* 18/*
18 * compare superblocks to see if they're equivalent 19 * compare superblocks to see if they're equivalent
@@ -44,6 +45,7 @@ static int get_sb_mtd_set(struct super_block *sb, void *_mtd)
44 45
45 sb->s_mtd = mtd; 46 sb->s_mtd = mtd;
46 sb->s_dev = MKDEV(MTD_BLOCK_MAJOR, mtd->index); 47 sb->s_dev = MKDEV(MTD_BLOCK_MAJOR, mtd->index);
48 sb->s_bdi = mtd->backing_dev_info;
47 return 0; 49 return 0;
48} 50}
49 51