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Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/mtdchar.c72
-rw-r--r--drivers/mtd/mtdconcat.c10
-rw-r--r--drivers/mtd/mtdcore.c81
-rw-r--r--drivers/mtd/mtdpart.c1
4 files changed, 33 insertions, 131 deletions
diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c
index 53563955931b..55fa27ecf4e1 100644
--- a/drivers/mtd/mtdchar.c
+++ b/drivers/mtd/mtdchar.c
@@ -49,7 +49,6 @@ static DEFINE_MUTEX(mtd_mutex);
*/
struct mtd_file_info {
struct mtd_info *mtd;
- struct inode *ino;
enum mtd_file_modes mode;
};
@@ -59,10 +58,6 @@ static loff_t mtdchar_lseek(struct file *file, loff_t offset, int orig)
return fixed_size_llseek(file, offset, orig, mfi->mtd->size);
}
-static int count;
-static struct vfsmount *mnt;
-static struct file_system_type mtd_inodefs_type;
-
static int mtdchar_open(struct inode *inode, struct file *file)
{
int minor = iminor(inode);
@@ -70,7 +65,6 @@ static int mtdchar_open(struct inode *inode, struct file *file)
int ret = 0;
struct mtd_info *mtd;
struct mtd_file_info *mfi;
- struct inode *mtd_ino;
pr_debug("MTD_open\n");
@@ -78,10 +72,6 @@ static int mtdchar_open(struct inode *inode, struct file *file)
if ((file->f_mode & FMODE_WRITE) && (minor & 1))
return -EACCES;
- ret = simple_pin_fs(&mtd_inodefs_type, &mnt, &count);
- if (ret)
- return ret;
-
mutex_lock(&mtd_mutex);
mtd = get_mtd_device(NULL, devnum);
@@ -95,43 +85,26 @@ static int mtdchar_open(struct inode *inode, struct file *file)
goto out1;
}
- mtd_ino = iget_locked(mnt->mnt_sb, devnum);
- if (!mtd_ino) {
- ret = -ENOMEM;
- goto out1;
- }
- if (mtd_ino->i_state & I_NEW) {
- mtd_ino->i_private = mtd;
- mtd_ino->i_mode = S_IFCHR;
- mtd_ino->i_data.backing_dev_info = mtd->backing_dev_info;
- unlock_new_inode(mtd_ino);
- }
- file->f_mapping = mtd_ino->i_mapping;
-
/* You can't open it RW if it's not a writeable device */
if ((file->f_mode & FMODE_WRITE) && !(mtd->flags & MTD_WRITEABLE)) {
ret = -EACCES;
- goto out2;
+ goto out1;
}
mfi = kzalloc(sizeof(*mfi), GFP_KERNEL);
if (!mfi) {
ret = -ENOMEM;
- goto out2;
+ goto out1;
}
- mfi->ino = mtd_ino;
mfi->mtd = mtd;
file->private_data = mfi;
mutex_unlock(&mtd_mutex);
return 0;
-out2:
- iput(mtd_ino);
out1:
put_mtd_device(mtd);
out:
mutex_unlock(&mtd_mutex);
- simple_release_fs(&mnt, &count);
return ret;
} /* mtdchar_open */
@@ -148,12 +121,9 @@ static int mtdchar_close(struct inode *inode, struct file *file)
if ((file->f_mode & FMODE_WRITE))
mtd_sync(mtd);
- iput(mfi->ino);
-
put_mtd_device(mtd);
file->private_data = NULL;
kfree(mfi);
- simple_release_fs(&mnt, &count);
return 0;
} /* mtdchar_close */
@@ -1117,6 +1087,13 @@ static unsigned long mtdchar_get_unmapped_area(struct file *file,
ret = mtd_get_unmapped_area(mtd, len, offset, flags);
return ret == -EOPNOTSUPP ? -ENODEV : ret;
}
+
+static unsigned mtdchar_mmap_capabilities(struct file *file)
+{
+ struct mtd_file_info *mfi = file->private_data;
+
+ return mtd_mmap_capabilities(mfi->mtd);
+}
#endif
/*
@@ -1160,27 +1137,10 @@ static const struct file_operations mtd_fops = {
.mmap = mtdchar_mmap,
#ifndef CONFIG_MMU
.get_unmapped_area = mtdchar_get_unmapped_area,
+ .mmap_capabilities = mtdchar_mmap_capabilities,
#endif
};
-static const struct super_operations mtd_ops = {
- .drop_inode = generic_delete_inode,
- .statfs = simple_statfs,
-};
-
-static struct dentry *mtd_inodefs_mount(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
-{
- return mount_pseudo(fs_type, "mtd_inode:", &mtd_ops, NULL, MTD_INODE_FS_MAGIC);
-}
-
-static struct file_system_type mtd_inodefs_type = {
- .name = "mtd_inodefs",
- .mount = mtd_inodefs_mount,
- .kill_sb = kill_anon_super,
-};
-MODULE_ALIAS_FS("mtd_inodefs");
-
int __init init_mtdchar(void)
{
int ret;
@@ -1193,23 +1153,11 @@ int __init init_mtdchar(void)
return ret;
}
- ret = register_filesystem(&mtd_inodefs_type);
- if (ret) {
- pr_err("Can't register mtd_inodefs filesystem, error %d\n",
- ret);
- goto err_unregister_chdev;
- }
-
- return ret;
-
-err_unregister_chdev:
- __unregister_chrdev(MTD_CHAR_MAJOR, 0, 1 << MINORBITS, "mtd");
return ret;
}
void __exit cleanup_mtdchar(void)
{
- unregister_filesystem(&mtd_inodefs_type);
__unregister_chrdev(MTD_CHAR_MAJOR, 0, 1 << MINORBITS, "mtd");
}
diff --git a/drivers/mtd/mtdconcat.c b/drivers/mtd/mtdconcat.c
index b9000563b9f4..eacc3aac7327 100644
--- a/drivers/mtd/mtdconcat.c
+++ b/drivers/mtd/mtdconcat.c
@@ -732,8 +732,6 @@ struct mtd_info *mtd_concat_create(struct mtd_info *subdev[], /* subdevices to c
concat->mtd.ecc_stats.badblocks = subdev[0]->ecc_stats.badblocks;
- concat->mtd.backing_dev_info = subdev[0]->backing_dev_info;
-
concat->subdev[0] = subdev[0];
for (i = 1; i < num_devs; i++) {
@@ -761,14 +759,6 @@ struct mtd_info *mtd_concat_create(struct mtd_info *subdev[], /* subdevices to c
subdev[i]->flags & MTD_WRITEABLE;
}
- /* only permit direct mapping if the BDIs are all the same
- * - copy-mapping is still permitted
- */
- if (concat->mtd.backing_dev_info !=
- subdev[i]->backing_dev_info)
- concat->mtd.backing_dev_info =
- &default_backing_dev_info;
-
concat->mtd.size += subdev[i]->size;
concat->mtd.ecc_stats.badblocks +=
subdev[i]->ecc_stats.badblocks;
diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c
index 4c611871d7e6..0ec4d6ea1e4b 100644
--- a/drivers/mtd/mtdcore.c
+++ b/drivers/mtd/mtdcore.c
@@ -43,33 +43,7 @@
#include "mtdcore.h"
-/*
- * backing device capabilities for non-mappable devices (such as NAND flash)
- * - permits private mappings, copies are taken of the data
- */
-static 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
- */
-static 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
- */
-static 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 struct backing_dev_info mtd_bdi = {
};
static int mtd_cls_suspend(struct device *dev, pm_message_t state);
@@ -365,6 +339,23 @@ static struct device_type mtd_devtype = {
.release = mtd_release,
};
+#ifndef CONFIG_MMU
+unsigned mtd_mmap_capabilities(struct mtd_info *mtd)
+{
+ switch (mtd->type) {
+ case MTD_RAM:
+ return NOMMU_MAP_COPY | NOMMU_MAP_DIRECT | NOMMU_MAP_EXEC |
+ NOMMU_MAP_READ | NOMMU_MAP_WRITE;
+ case MTD_ROM:
+ return NOMMU_MAP_COPY | NOMMU_MAP_DIRECT | NOMMU_MAP_EXEC |
+ NOMMU_MAP_READ;
+ default:
+ return NOMMU_MAP_COPY;
+ }
+}
+EXPORT_SYMBOL_GPL(mtd_mmap_capabilities);
+#endif
+
/**
* add_mtd_device - register an MTD device
* @mtd: pointer to new MTD device info structure
@@ -380,19 +371,7 @@ int add_mtd_device(struct mtd_info *mtd)
struct mtd_notifier *not;
int i, error;
- if (!mtd->backing_dev_info) {
- switch (mtd->type) {
- case MTD_RAM:
- mtd->backing_dev_info = &mtd_bdi_rw_mappable;
- break;
- case MTD_ROM:
- mtd->backing_dev_info = &mtd_bdi_ro_mappable;
- break;
- default:
- mtd->backing_dev_info = &mtd_bdi_unmappable;
- break;
- }
- }
+ mtd->backing_dev_info = &mtd_bdi;
BUG_ON(mtd->writesize == 0);
mutex_lock(&mtd_table_mutex);
@@ -1237,17 +1216,9 @@ static int __init init_mtd(void)
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");
+ ret = mtd_bdi_init(&mtd_bdi, "mtd");
if (ret)
- goto err_bdi3;
+ goto err_bdi;
proc_mtd = proc_create("mtd", 0, NULL, &mtd_proc_ops);
@@ -1260,11 +1231,7 @@ static int __init init_mtd(void)
out_procfs:
if (proc_mtd)
remove_proc_entry("mtd", NULL);
-err_bdi3:
- bdi_destroy(&mtd_bdi_ro_mappable);
-err_bdi2:
- bdi_destroy(&mtd_bdi_unmappable);
-err_bdi1:
+err_bdi:
class_unregister(&mtd_class);
err_reg:
pr_err("Error registering mtd class or bdi: %d\n", ret);
@@ -1277,9 +1244,7 @@ static void __exit cleanup_mtd(void)
if (proc_mtd)
remove_proc_entry("mtd", NULL);
class_unregister(&mtd_class);
- bdi_destroy(&mtd_bdi_unmappable);
- bdi_destroy(&mtd_bdi_ro_mappable);
- bdi_destroy(&mtd_bdi_rw_mappable);
+ bdi_destroy(&mtd_bdi);
}
module_init(init_mtd);
diff --git a/drivers/mtd/mtdpart.c b/drivers/mtd/mtdpart.c
index a3e3a7d074d5..e779de315ade 100644
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -378,7 +378,6 @@ static struct mtd_part *allocate_partition(struct mtd_info *master,
slave->mtd.name = name;
slave->mtd.owner = master->owner;
- slave->mtd.backing_dev_info = master->backing_dev_info;
/* NOTE: we don't arrange MTDs as a tree; it'd be error-prone
* to have the same data be in two different partitions.
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-12-20 01:43:53 +0000