linux/drivers/mtd/ubi/wl.h
Zhihao Cheng 14072ee33d ubi: fastmap: Check wl_pool for free peb before wear leveling
UBI fetches free peb from wl_pool during wear leveling, so UBI should
check wl_pool's empty status before wear leveling. Otherwise, UBI will
miss wear leveling chances when free pebs are run out.

Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
2022-05-27 16:49:07 +02:00

31 lines
1.3 KiB
C

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef UBI_WL_H
#define UBI_WL_H
#ifdef CONFIG_MTD_UBI_FASTMAP
static void update_fastmap_work_fn(struct work_struct *wrk);
static struct ubi_wl_entry *find_anchor_wl_entry(struct rb_root *root);
static struct ubi_wl_entry *get_peb_for_wl(struct ubi_device *ubi);
static struct ubi_wl_entry *next_peb_for_wl(struct ubi_device *ubi);
static bool need_wear_leveling(struct ubi_device *ubi);
static void ubi_fastmap_close(struct ubi_device *ubi);
static inline void ubi_fastmap_init(struct ubi_device *ubi, int *count)
{
/* Reserve enough LEBs to store two fastmaps. */
*count += (ubi->fm_size / ubi->leb_size) * 2;
INIT_WORK(&ubi->fm_work, update_fastmap_work_fn);
}
static struct ubi_wl_entry *may_reserve_for_fm(struct ubi_device *ubi,
struct ubi_wl_entry *e,
struct rb_root *root);
#else /* !CONFIG_MTD_UBI_FASTMAP */
static struct ubi_wl_entry *get_peb_for_wl(struct ubi_device *ubi);
static inline void ubi_fastmap_close(struct ubi_device *ubi) { }
static inline void ubi_fastmap_init(struct ubi_device *ubi, int *count) { }
static struct ubi_wl_entry *may_reserve_for_fm(struct ubi_device *ubi,
struct ubi_wl_entry *e,
struct rb_root *root) {
return e;
}
#endif /* CONFIG_MTD_UBI_FASTMAP */
#endif /* UBI_WL_H */