diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-04-28 14:56:05 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-04-28 14:56:05 (GMT) |
commit | 970b06485ffee36aa3549dfe4c6b2a2c2118354d (patch) | |
tree | 1b0f6f4182e73d19071addf8a209e5fb58483d08 /drivers/mtd | |
parent | 696e65c3606aa3f587eeb181766baf49ea750cfc (diff) | |
parent | 33f60e9640b2f60dde6735293d4aa5ecc5b1d5d5 (diff) | |
download | linux-fsl-qoriq-970b06485ffee36aa3549dfe4c6b2a2c2118354d.tar.xz |
Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block
* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
coda: move backing-dev.h kernel include inside __KERNEL__
mtd: ensure that bdi entries are properly initialized and registered
Move mtd_bdi_*mappable to mtdcore.c
btrfs: convert to using bdi_setup_and_register()
Catch filesystems lacking s_bdi
drbd: Terminate a connection early if sending the protocol fails
drbd: fix memory leak
Fix JFFS2 sync silent failure
smbfs: add bdi backing to mount session
ncpfs: add bdi backing to mount session
exofs: add bdi backing to mount session
ecryptfs: add bdi backing to mount session
coda: add bdi backing to mount session
cifs: add bdi backing to mount session
afs: add bdi backing to mount session.
9p: add bdi backing to mount session
bdi: add helper function for doing init and register of a bdi for a file system
block: ensure jiffies wrap is handled correctly in blk_rq_timed_out_timer
Diffstat (limited to 'drivers/mtd')
-rw-r--r-- | drivers/mtd/Makefile | 2 | ||||
-rw-r--r-- | drivers/mtd/internal.h | 17 | ||||
-rw-r--r-- | drivers/mtd/mtdbdi.c | 43 | ||||
-rw-r--r-- | drivers/mtd/mtdcore.c | 79 | ||||
-rw-r--r-- | drivers/mtd/mtdsuper.c | 2 |
5 files changed, 77 insertions, 66 deletions
diff --git a/drivers/mtd/Makefile b/drivers/mtd/Makefile index 82d1e4d..4521b1e 100644 --- a/drivers/mtd/Makefile +++ b/drivers/mtd/Makefile @@ -4,7 +4,7 @@ # Core functionality. obj-$(CONFIG_MTD) += mtd.o -mtd-y := mtdcore.o mtdsuper.o mtdbdi.o +mtd-y := mtdcore.o mtdsuper.o mtd-$(CONFIG_MTD_PARTITIONS) += mtdpart.o obj-$(CONFIG_MTD_CONCAT) += mtdconcat.o diff --git a/drivers/mtd/internal.h b/drivers/mtd/internal.h index c658fe7..e69de29 100644 --- a/drivers/mtd/internal.h +++ b/drivers/mtd/internal.h @@ -1,17 +0,0 @@ -/* Internal MTD definitions - * - * 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. - */ - -/* - * mtdbdi.c - */ -extern struct backing_dev_info mtd_bdi_unmappable; -extern struct backing_dev_info mtd_bdi_ro_mappable; -extern struct backing_dev_info mtd_bdi_rw_mappable; diff --git a/drivers/mtd/mtdbdi.c b/drivers/mtd/mtdbdi.c index 5ca5aed..e69de29 100644 --- a/drivers/mtd/mtdbdi.c +++ b/drivers/mtd/mtdbdi.c @@ -1,43 +0,0 @@ -/* 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), -}; diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c index 5b38b17..b177e75 100644 --- a/drivers/mtd/mtdcore.c +++ b/drivers/mtd/mtdcore.c @@ -2,6 +2,9 @@ * Core registration and callback routines for MTD * drivers and users. * + * bdi bits are: + * Copyright © 2006 Red Hat, Inc. All Rights Reserved. + * Written by David Howells (dhowells@redhat.com) */ #include <linux/module.h> @@ -16,11 +19,39 @@ #include <linux/init.h> #include <linux/mtd/compatmac.h> #include <linux/proc_fs.h> +#include <linux/backing-dev.h> #include <linux/mtd/mtd.h> -#include "internal.h" #include "mtdcore.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), +}; static int mtd_cls_suspend(struct device *dev, pm_message_t state); static int mtd_cls_resume(struct device *dev); @@ -628,20 +659,55 @@ done: /*====================================================================*/ /* Init code */ +static int __init mtd_bdi_init(struct backing_dev_info *bdi, const char *name) +{ + int ret; + + ret = bdi_init(bdi); + if (!ret) + ret = bdi_register(bdi, NULL, name); + + if (ret) + bdi_destroy(bdi); + + return ret; +} + static int __init init_mtd(void) { int ret; + ret = class_register(&mtd_class); + if (ret) + goto err_reg; + + ret = mtd_bdi_init(&mtd_bdi_unmappable, "mtd-unmap"); + if (ret) + goto err_bdi1; + + ret = mtd_bdi_init(&mtd_bdi_ro_mappable, "mtd-romap"); + if (ret) + goto err_bdi2; + + ret = mtd_bdi_init(&mtd_bdi_rw_mappable, "mtd-rwmap"); + if (ret) + goto err_bdi3; - if (ret) { - pr_err("Error registering mtd class: %d\n", ret); - return ret; - } #ifdef CONFIG_PROC_FS if ((proc_mtd = create_proc_entry( "mtd", 0, NULL ))) proc_mtd->read_proc = mtd_read_proc; #endif /* CONFIG_PROC_FS */ return 0; + +err_bdi3: + bdi_destroy(&mtd_bdi_ro_mappable); +err_bdi2: + bdi_destroy(&mtd_bdi_unmappable); +err_bdi1: + class_unregister(&mtd_class); +err_reg: + pr_err("Error registering mtd class or bdi: %d\n", ret); + return ret; } static void __exit cleanup_mtd(void) @@ -651,6 +717,9 @@ static void __exit cleanup_mtd(void) remove_proc_entry( "mtd", NULL); #endif /* CONFIG_PROC_FS */ class_unregister(&mtd_class); + bdi_destroy(&mtd_bdi_unmappable); + bdi_destroy(&mtd_bdi_ro_mappable); + bdi_destroy(&mtd_bdi_rw_mappable); } module_init(init_mtd); diff --git a/drivers/mtd/mtdsuper.c b/drivers/mtd/mtdsuper.c index af8b42e..7c00319 100644 --- a/drivers/mtd/mtdsuper.c +++ b/drivers/mtd/mtdsuper.c @@ -13,6 +13,7 @@ #include <linux/mtd/super.h> #include <linux/namei.h> #include <linux/ctype.h> +#include <linux/slab.h> /* * compare superblocks to see if they're equivalent @@ -44,6 +45,7 @@ static int get_sb_mtd_set(struct super_block *sb, void *_mtd) sb->s_mtd = mtd; sb->s_dev = MKDEV(MTD_BLOCK_MAJOR, mtd->index); + sb->s_bdi = mtd->backing_dev_info; return 0; } |