STRUCT UBI_WL_ENTRY(9)

✨ NAME ✨

okay bestie, this is struct ubi_wl_entry from the Kernel API Manual — literally the wear-leveling entry 💅. she's a kernel struct, she's iconic, and we're gonna get into it.

🦋 SYNOPSIS 🦋

the whole shape of her, no cap:

struct ubi_wl_entry {
    union {
      struct rb_node rb;
      struct list_head list;
    } u;
    int ec;
    int pnum;
 };

🎀 MEMBERS 🎀

• u.rb — link in the corresponding (free/used) RB-tree 🌈
• u.list — link in the protection queue 🫶
• ec — erase counter, periodt
• pnum — physical eraseblock number, no cap

💖 DESCRIPTION 💖

so this data structure is used in the WL sub-system — yes, that one. each physical eraseblock has a corresponding struct wl_entry object, and that object may be kept in different RB-trees. it's giving multi-tree main character energy 😭. See WL sub-system for details, iykyk.

💫 SEE ALSO 💫

• Kernel file ./drivers/mtd/ubi/ubi.h
• struct ubi_vid_io_buf(9)
• struct ubi_ltree_entry(9)
• struct ubi_rename_entry(9)
• struct ubi_fastmap_layout(9)
• struct ubi_fm_pool(9)
• struct ubi_eba_leb_desc(9)
• struct ubi_volume(9)
• struct ubi_volume_desc(9)
• struct ubi_debug_info(9)
• struct ubi_device(9)
• struct ubi_ainf_peb(9)
• struct ubi_ainf_volume(9)
• struct ubi_attach_info(9)
• struct ubi_work(9)
• ubi_init_vid_buf(9)
• ubi_free_vid_buf(9)
• ubi_get_vid_hdr(9)
• ubi_ro_mode(9)
• vol_id2idx(9)
• idx2vol_id(9)
• ubi_is_fm_vol(9)
• ubi_find_fm_block(9)

that's the whole page, bestie 🫶 this was the Kernel API Manual, source/version ./drivers/mtd/ubi, dated October 2026, and the page is struct ubi_wl_entry(9) — mwah 💋✨