ubi_wl_get_fm_peb(9)

💖 ubi_wl_get_fm_peb(9) 💖

okay so bestie, welcome to the ubi_wl_get_fm_peb(9) page — this one is lowkey niche but honestly kinda iconic once you get the vibe ✨

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✨ NAME ✨

ubi_wl_get_fm_peb — find a physical erase block with a given maximal number. no cap, that's literally the whole mission 🎯

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🌸 SYNOPSIS 🌸

struct ubi_wl_entry * ubi_wl_get_fm_peb (struct ubi_device *ubi , int anchor );

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🎀 ARGUMENTS 🎀

• ubi — the UBI device description object, aka the device we are doing this little operation on 🫶
• anchor — this PEB is gonna be used as the anchor PEB by fastmap. she has a job and she is doing it 💅

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🦋 DESCRIPTION 🦋

So the way this works: the function returns a physical erase block with a given maximal number, and then it removes it from the wl subsystem. periodt, that's the behavior 💖

⚠️ bestie, listen: it must be called with wl_lock held! not optional, not a suggestion, not a vibe — an actual requirement 😭🔒

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🌈 SEE ALSO 🌈

• Kernel file: ./drivers/mtd/ubi/fastmap-wl.c
• update_fastmap_work_fn(9)
• find_anchor_wl_entry(9)
• return_unused_pool_pebs(9)
• ubi_refill_pools_and_lock(9)
• produce_free_peb(9)
• ubi_wl_get_peb(9)
• next_peb_for_wl(9)
• need_wear_leveling(9)
• ubi_ensure_anchor_pebs(9)
• ubi_wl_put_fm_peb(9)
• ubi_is_erase_work(9)
• may_reserve_for_fm(9)

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mwah 💋 this page came from source/version line ./drivers/mtd/ubi, dated October 2026, and it's literally the ubi_wl_get_fm_peb(9) manual — slay and goodbye 🎀🦋