register_mtd_user(9)

💖 register_mtd_user(9) 💖

okay bestie, welcome to the Kernel API Manual — yes this is literally a kernel manpage and yes we're gonna make it cute. today's main character is register_mtd_user, and it's giving "let me introduce you to all my MTD friends" energy. 🦋

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✨ NAME ✨

register_mtd_user — the function that registers a 'user' of MTD devices. no cap, that's the whole vibe. 💅

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🌸 SYNOPSIS 🌸

void register_mtd_user (struct mtd_notifier *new );

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🎀 ARGUMENTS 🎀

• new — pointer to the notifier info structure. like, the little info card for whoever's signing up to get the callbacks. 🫶

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💜 DESCRIPTION 💜

so what this does is register a pair of callback functions that get called whenever MTD devices show up or dip out. addition or removal of MTD devices — both covered, periodt. ✨

and the iconic part? it immediately invokes the 'add' callback for each MTD device that's currently present in the system. not me getting you introduced to everyone already at the party the second you walk in 😭🔥 it's literally instant friendship, iykyk.

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🌈 SEE ALSO 🌈

kernel file ./drivers/mtd/mtdcore.c — go read the source bestie, it's right there 💖

and the whole extended friend group:

• mtd_wunit_to_pairing_info(9)
• mtd_pairing_info_to_wunit(9)
• mtd_pairing_groups(9)
• add_mtd_device(9)
• del_mtd_device(9)
• mtd_device_parse_register(9)
• mtd_device_unregister(9)
• unregister_mtd_user(9)
• get_mtd_device(9)
• of_get_mtd_device_by_node(9)
• get_mtd_device_nm(9)
• mtd_ooblayout_ecc(9)
• mtd_ooblayout_free(9)
• mtd_ooblayout_find_region(9)
• mtd_ooblayout_find_eccregion(9)
• mtd_ooblayout_get_bytes(9)
• mtd_ooblayout_set_bytes(9)
• mtd_ooblayout_count_bytes(9)
• mtd_ooblayout_get_eccbytes(9)
• mtd_ooblayout_set_eccbytes(9)
• mtd_ooblayout_get_databytes(9)
• mtd_ooblayout_set_databytes(9)
• mtd_ooblayout_count_freebytes(9)
• mtd_ooblayout_count_eccbytes(9)
• mtd_kmalloc_up_to(9)

like, that's the whole group chat. go say hi. 👑💅

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anyway that's the page!! this lil slice lives in ./drivers/mtd and was dated October 2026 — mwah, sending you off with a kiss and a void return type (aka it gives you nothing back, but emotionally it gives everything 💀💖). bye bestie!! 🎀🦋🌸