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UBI: remove ubi_devices_cnt

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This global variablea is not really needed, remove it

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
This commit is contained in:
Artem Bityutskiy 2007-12-16 13:01:03 +02:00
parent 06b68ba156
commit b96bf4c33d
3 changed files with 27 additions and 21 deletions
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40
drivers/mtd/ubi/build.c
View File

@ -58,9 +58,6 @@ static int mtd_devs = 0;
/* MTD devices specification parameters */ /* MTD devices specification parameters */
static struct mtd_dev_param mtd_dev_param[UBI_MAX_DEVICES]; static struct mtd_dev_param mtd_dev_param[UBI_MAX_DEVICES];
/* Number of UBI devices in system */
int ubi_devices_cnt;
/* All UBI devices in system */ /* All UBI devices in system */
struct ubi_device *ubi_devices[UBI_MAX_DEVICES]; struct ubi_device *ubi_devices[UBI_MAX_DEVICES];
@ -566,26 +563,39 @@ static int attach_mtd_dev(const char *mtd_dev, int vid_hdr_offset,
} }
/* Check if we already have the same MTD device attached */ /* Check if we already have the same MTD device attached */
for (i = 0; i < ubi_devices_cnt; i++) for (i = 0; i < UBI_MAX_DEVICES; i++)
if (ubi_devices[i]->mtd->index == mtd->index) { ubi = ubi_devices[i];
if (ubi && ubi->mtd->index == mtd->index) {
ubi_err("mtd%d is already attached to ubi%d", ubi_err("mtd%d is already attached to ubi%d",
mtd->index, i); mtd->index, i);
err = -EINVAL; err = -EINVAL;
goto out_mtd; goto out_mtd;
} }
ubi = ubi_devices[ubi_devices_cnt] = kzalloc(sizeof(struct ubi_device), ubi = kzalloc(sizeof(struct ubi_device), GFP_KERNEL);
GFP_KERNEL);
if (!ubi) { if (!ubi) {
err = -ENOMEM; err = -ENOMEM;
goto out_mtd; goto out_mtd;
} }
ubi->ubi_num = ubi_devices_cnt;
ubi->mtd = mtd; ubi->mtd = mtd;
/* Search for an empty slot in the @ubi_devices array */
ubi->ubi_num = -1;
for (i = 0; i < UBI_MAX_DEVICES; i++)
if (!ubi_devices[i]) {
ubi->ubi_num = i;
break;
}
if (ubi->ubi_num == -1) {
ubi_err("only %d UBI devices may be created", UBI_MAX_DEVICES);
err = -ENFILE;
goto out_free;
}
dbg_msg("attaching mtd%d to ubi%d: VID header offset %d data offset %d", dbg_msg("attaching mtd%d to ubi%d: VID header offset %d data offset %d",
ubi->mtd->index, ubi_devices_cnt, vid_hdr_offset, data_offset); ubi->mtd->index, ubi->ubi_num, vid_hdr_offset, data_offset);
ubi->vid_hdr_offset = vid_hdr_offset; ubi->vid_hdr_offset = vid_hdr_offset;
ubi->leb_start = data_offset; ubi->leb_start = data_offset;
@ -619,7 +629,7 @@ static int attach_mtd_dev(const char *mtd_dev, int vid_hdr_offset,
if (err) if (err)
goto out_detach; goto out_detach;
ubi_msg("attached mtd%d to ubi%d", ubi->mtd->index, ubi_devices_cnt); ubi_msg("attached mtd%d to ubi%d", ubi->mtd->index, ubi->ubi_num);
ubi_msg("MTD device name: \"%s\"", ubi->mtd->name); ubi_msg("MTD device name: \"%s\"", ubi->mtd->name);
ubi_msg("MTD device size: %llu MiB", ubi->flash_size >> 20); ubi_msg("MTD device size: %llu MiB", ubi->flash_size >> 20);
ubi_msg("physical eraseblock size: %d bytes (%d KiB)", ubi_msg("physical eraseblock size: %d bytes (%d KiB)",
@ -648,7 +658,7 @@ static int attach_mtd_dev(const char *mtd_dev, int vid_hdr_offset,
wake_up_process(ubi->bgt_thread); wake_up_process(ubi->bgt_thread);
} }
ubi_devices_cnt += 1; ubi_devices[ubi->ubi_num] = ubi;
return 0; return 0;
out_detach: out_detach:
@ -664,7 +674,6 @@ static int attach_mtd_dev(const char *mtd_dev, int vid_hdr_offset,
kfree(ubi); kfree(ubi);
out_mtd: out_mtd:
put_mtd_device(mtd); put_mtd_device(mtd);
ubi_devices[ubi_devices_cnt] = NULL;
return err; return err;
} }
@ -689,8 +698,6 @@ static void detach_mtd_dev(struct ubi_device *ubi)
#endif #endif
kfree(ubi_devices[ubi_num]); kfree(ubi_devices[ubi_num]);
ubi_devices[ubi_num] = NULL; ubi_devices[ubi_num] = NULL;
ubi_devices_cnt -= 1;
ubi_assert(ubi_devices_cnt >= 0);
ubi_msg("mtd%d is detached from ubi%d", mtd_num, ubi_num); ubi_msg("mtd%d is detached from ubi%d", mtd_num, ubi_num);
} }
@ -770,9 +777,10 @@ module_init(ubi_init);
static void __exit ubi_exit(void) static void __exit ubi_exit(void)
{ {
int i, n = ubi_devices_cnt; int i;
for (i = 0; i < n; i++) for (i = 0; i < UBI_MAX_DEVICES; i++)
if (ubi_devices[i])
detach_mtd_dev(ubi_devices[i]); detach_mtd_dev(ubi_devices[i]);
kmem_cache_destroy(ubi_wl_entry_slab); kmem_cache_destroy(ubi_wl_entry_slab);
kmem_cache_destroy(ubi_ltree_slab); kmem_cache_destroy(ubi_ltree_slab);

2
drivers/mtd/ubi/cdev.c
View File

@ -60,7 +60,7 @@ static struct ubi_device *major_to_device(int major)
{ {
int i; int i;
for (i = 0; i < ubi_devices_cnt; i++) for (i = 0; i < UBI_MAX_DEVICES; i++)
if (ubi_devices[i] && MAJOR(ubi_devices[i]->cdev.dev) == major) if (ubi_devices[i] && MAJOR(ubi_devices[i]->cdev.dev) == major)
return ubi_devices[i]; return ubi_devices[i];
BUG(); BUG();

4
drivers/mtd/ubi/ubi.h
View File

@ -94,9 +94,6 @@ enum {
UBI_IO_BITFLIPS UBI_IO_BITFLIPS
}; };
extern int ubi_devices_cnt;
extern struct ubi_device *ubi_devices[];
/** /**
* struct ubi_wl_entry - wear-leveling entry. * struct ubi_wl_entry - wear-leveling entry.
* @rb: link in the corresponding RB-tree * @rb: link in the corresponding RB-tree
@ -401,6 +398,7 @@ extern struct kmem_cache *ubi_ltree_slab;
extern struct kmem_cache *ubi_wl_entry_slab; extern struct kmem_cache *ubi_wl_entry_slab;
extern struct file_operations ubi_cdev_operations; extern struct file_operations ubi_cdev_operations;
extern struct file_operations ubi_vol_cdev_operations; extern struct file_operations ubi_vol_cdev_operations;
extern struct ubi_device *ubi_devices[];
extern struct class *ubi_class; extern struct class *ubi_class;
/* vtbl.c */ /* vtbl.c */