mirror of https://gitee.com/openkylin/linux.git
UBI: remove ubi_devices_cnt
This global variablea is not really needed, remove it Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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06b68ba156
commit
b96bf4c33d
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@ -58,9 +58,6 @@ static int mtd_devs = 0;
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/* MTD devices specification parameters */
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static struct mtd_dev_param mtd_dev_param[UBI_MAX_DEVICES];
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/* Number of UBI devices in system */
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int ubi_devices_cnt;
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/* All UBI devices in system */
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struct ubi_device *ubi_devices[UBI_MAX_DEVICES];
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@ -566,26 +563,39 @@ static int attach_mtd_dev(const char *mtd_dev, int vid_hdr_offset,
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}
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/* Check if we already have the same MTD device attached */
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for (i = 0; i < ubi_devices_cnt; i++)
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if (ubi_devices[i]->mtd->index == mtd->index) {
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for (i = 0; i < UBI_MAX_DEVICES; i++)
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ubi = ubi_devices[i];
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if (ubi && ubi->mtd->index == mtd->index) {
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ubi_err("mtd%d is already attached to ubi%d",
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mtd->index, i);
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err = -EINVAL;
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goto out_mtd;
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}
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ubi = ubi_devices[ubi_devices_cnt] = kzalloc(sizeof(struct ubi_device),
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GFP_KERNEL);
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ubi = kzalloc(sizeof(struct ubi_device), GFP_KERNEL);
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if (!ubi) {
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err = -ENOMEM;
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goto out_mtd;
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}
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ubi->ubi_num = ubi_devices_cnt;
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ubi->mtd = mtd;
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/* Search for an empty slot in the @ubi_devices array */
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ubi->ubi_num = -1;
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for (i = 0; i < UBI_MAX_DEVICES; i++)
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if (!ubi_devices[i]) {
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ubi->ubi_num = i;
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break;
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}
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if (ubi->ubi_num == -1) {
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ubi_err("only %d UBI devices may be created", UBI_MAX_DEVICES);
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err = -ENFILE;
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goto out_free;
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}
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dbg_msg("attaching mtd%d to ubi%d: VID header offset %d data offset %d",
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ubi->mtd->index, ubi_devices_cnt, vid_hdr_offset, data_offset);
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ubi->mtd->index, ubi->ubi_num, vid_hdr_offset, data_offset);
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ubi->vid_hdr_offset = vid_hdr_offset;
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ubi->leb_start = data_offset;
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@ -619,7 +629,7 @@ static int attach_mtd_dev(const char *mtd_dev, int vid_hdr_offset,
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if (err)
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goto out_detach;
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ubi_msg("attached mtd%d to ubi%d", ubi->mtd->index, ubi_devices_cnt);
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ubi_msg("attached mtd%d to ubi%d", ubi->mtd->index, ubi->ubi_num);
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ubi_msg("MTD device name: \"%s\"", ubi->mtd->name);
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ubi_msg("MTD device size: %llu MiB", ubi->flash_size >> 20);
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ubi_msg("physical eraseblock size: %d bytes (%d KiB)",
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@ -648,7 +658,7 @@ static int attach_mtd_dev(const char *mtd_dev, int vid_hdr_offset,
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wake_up_process(ubi->bgt_thread);
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}
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ubi_devices_cnt += 1;
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ubi_devices[ubi->ubi_num] = ubi;
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return 0;
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out_detach:
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@ -664,7 +674,6 @@ static int attach_mtd_dev(const char *mtd_dev, int vid_hdr_offset,
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kfree(ubi);
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out_mtd:
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put_mtd_device(mtd);
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ubi_devices[ubi_devices_cnt] = NULL;
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return err;
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}
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@ -689,8 +698,6 @@ static void detach_mtd_dev(struct ubi_device *ubi)
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#endif
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kfree(ubi_devices[ubi_num]);
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ubi_devices[ubi_num] = NULL;
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ubi_devices_cnt -= 1;
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ubi_assert(ubi_devices_cnt >= 0);
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ubi_msg("mtd%d is detached from ubi%d", mtd_num, ubi_num);
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}
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@ -770,10 +777,11 @@ module_init(ubi_init);
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static void __exit ubi_exit(void)
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{
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int i, n = ubi_devices_cnt;
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int i;
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for (i = 0; i < n; i++)
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detach_mtd_dev(ubi_devices[i]);
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for (i = 0; i < UBI_MAX_DEVICES; i++)
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if (ubi_devices[i])
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detach_mtd_dev(ubi_devices[i]);
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kmem_cache_destroy(ubi_wl_entry_slab);
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kmem_cache_destroy(ubi_ltree_slab);
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class_remove_file(ubi_class, &ubi_version);
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@ -60,7 +60,7 @@ static struct ubi_device *major_to_device(int major)
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{
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int i;
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for (i = 0; i < ubi_devices_cnt; i++)
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for (i = 0; i < UBI_MAX_DEVICES; i++)
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if (ubi_devices[i] && MAJOR(ubi_devices[i]->cdev.dev) == major)
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return ubi_devices[i];
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BUG();
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@ -94,9 +94,6 @@ enum {
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UBI_IO_BITFLIPS
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};
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extern int ubi_devices_cnt;
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extern struct ubi_device *ubi_devices[];
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/**
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* struct ubi_wl_entry - wear-leveling entry.
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* @rb: link in the corresponding RB-tree
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@ -401,6 +398,7 @@ extern struct kmem_cache *ubi_ltree_slab;
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extern struct kmem_cache *ubi_wl_entry_slab;
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extern struct file_operations ubi_cdev_operations;
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extern struct file_operations ubi_vol_cdev_operations;
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extern struct ubi_device *ubi_devices[];
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extern struct class *ubi_class;
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/* vtbl.c */
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