self_check_in_wl_tree(9)

💅 self_check_in_wl_tree — like, the whole vibe

okay so first things first, bestie: this page lives in the Kernel API Manual, and it's about self_check_in_wl_tree, which is literally just a vibe check for your wear-leveling RB-tree. that's it. that's the function. no cap. 🌸

✨ NAME ✨

self_check_in_wl_tree — check that wear-leveling entry is in WL RB-tree.

like, it verifies that a wear-leveling entry is actually sitting in the WL RB-tree where it's supposed to be. simple. iconic. moving on. 💅

🦋 SYNOPSIS 🦋

int self_check_in_wl_tree (const struct ubi_device *ubi , struct
ubi_wl_entry *e , struct rb_root *root );

🎀 ARGUMENTS 🎀

• ubi — the UBI device description object. it's giving "who am I and what device am I on" energy.
• e — the wear-leveling entry to check. the main character we're doing a vibe check on, fr fr.
• root — the root of the tree. the tree we're checking e against. keep up bestie 🫶

🔥 DESCRIPTION 🔥

so the whole thing is this: this function returns zero if e is in the root RB-tree, and -EINVAL if it is not. that's literally the entire personality. zero = slay, she's in the tree. -EINVAL = not in the tree, and we're telling you about it. 😭✨

ngl bestie, this is a self-check function, so if you're getting -EINVAL in a context where that's not expected, something upstream is lowkey not doing its job. that's all I'm saying. 👀

🌈 SEE ALSO 🌈

kernel file ./drivers/mtd/ubi/wl.c, plus the whole friend group of related functions — every single one of these, no skips, bestie:

• wl_tree_add(9)
• wl_entry_destroy(9)
• do_work(9)
• in_wl_tree(9)
• in_pq(9)
• prot_queue_add(9)
• find_wl_entry(9)
• find_mean_wl_entry(9)
• wl_get_wle(9)
• prot_queue_del(9)
• ubi_sync_erase(9)
• serve_prot_queue(9)
• __schedule_ubi_work(9)
• schedule_ubi_work(9)
• schedule_erase(9)
• do_sync_erase(9)
• wear_leveling_worker(9)
• ensure_wear_leveling(9)
• __erase_worker(9)
• ubi_wl_put_peb(9)
• ubi_wl_scrub_peb(9)
• ubi_wl_flush(9)
• ubi_bitflip_check(9)
• tree_destroy(9)
• ubi_thread(9)
• shutdown_work(9)
• erase_aeb(9)
• ubi_wl_init(9)
• protection_queue_destroy(9)
• ubi_wl_close(9)
• self_check_ec(9)
• self_check_in_pq(9)
• produce_free_peb(9)
• ubi_wl_get_peb(9)

okay that's the whole page bestie, go forth and let your trees be correct 💖

mwah 💋 — brought to you by the source tree at ./drivers/mtd/ubi, dated October 2026, and the one and only self_check_in_wl_tree(9) 🎀🦋⭐