ubi_wl_init(9)

✨ ubi_wl_init(9) ✨

okay bestie so this page lives in the Kernel API Manual and it's literally all about one little function that gets the WL sub-system (that's wear leveling, iykyk 🎀) up and running using the attaching information you hand it. tiny page, big main character energy. let's get into it 💅

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🌸 NAME 🌸

ubi_wl_init — no cap, this one initializes the WL sub-system using attaching information. that's the whole vibe check. ✨

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🦋 SYNOPSIS 🦋

int ubi_wl_init (struct ubi_device *ubi , struct ubi_attach_info *ai );

yes the spacing is exactly like that, don't come for me, that's just how it's written 💀

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🎀 ARGUMENTS 🎀

• ubi — the UBI device description object, aka the whole personality of the device you're working with 🫶
• ai — the attaching information. literally the receipts from the attach, and this function is obsessed with them 🌈

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💖 DESCRIPTION 💖

so here's the tea ☕ — this function returns zero in case of success, and a negative error code in case of failure. that's it. that's the whole glow-up. zero = slay, negative = not slay, and you should probably check which one you got 🙈

fr fr, check the return value. a negative error code is the function telling you something went sideways, and you don't wanna find out the hard way 💀

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🔥 SEE ALSO 🔥

the friend group 🫶 — all of these live in the kernel file ./drivers/mtd/ubi/wl.c:

• 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)
• protection_queue_destroy(9)
• ubi_wl_close(9)
• self_check_ec(9)
• self_check_in_wl_tree(9)
• self_check_in_pq(9)
• produce_free_peb(9)
• ubi_wl_get_peb(9)

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and that's the whole page bestie, go forth and init some wear leveling 🌟

💜 mwah, this one came from ./drivers/mtd/ubi and it's dated October 2026 — iconic, timeless, periodt. 🎀