do_otp_lock(9)

📦 version 7.3.1, in nixpkgs unstable

💅 do_otp_lock — a Kernel API Manual moment (that's the manual name btw, Kernel API Manual, and we're in section 9, kernel API, iykyk)

okay so bestie, picture this: it's a kernel function, it's section 9, and it's got [DEFAULT] energy in the name line because it's literally tagged that way. Let's get into it 🫶

✨ NAME ✨

do_otp_lock — [DEFAULT] Lock OTP block area. that's it, that's the whole vibe. it locks the OTP block area. iconic, honestly 🔥

🌸 SYNOPSIS 🌸

int do_otp_lock (struct mtd_info *mtd , loff_t from , size_t len ,
size_t *retlen , u_char *buf );

five arguments, one int coming back at you. she's got a signature and she's not afraid to use it 💅

🎀 ARGUMENTS 🎀

  • mtd — the MTD device structure. your actual flash device bestie, the whole point of the operation.
  • from — the offset to lock. where the lock starts 🦋
  • len — number of bytes to lock. how much of it we're locking down, fr fr.
  • retlen — pointer to variable to store the number of lock bytes. so like, she writes back how many bytes actually got locked, through this pointer ✨
  • buf — the databuffer to put/get data. yes it says put/get, both, that's literally what the original says, don't come for me 🙈

💖 DESCRIPTION 💖

Lock OTP block area.

no cap, that's the entire description — short, sweet, and absolutely serving main character energy. she locks the OTP block area, she does it well, and she doesn't over-explain herself 👑

🌈 SEE ALSO 🌈

the kernel file ./drivers/mtd/nand/onenand/onenand_base.c is where this lives, and here's the full squad she runs with — every single one, no skipping:

that's a whole friend group and they all ate 💀💖

ok but fr fr, peek at your retlen and buf before you call this — those are pointers, and pointers without somewhere real to point are giving undefined behaviour energy 😭 treat them right!

mwah, that's the page! 🧚 this one ships out of ./drivers/mtd/nand/onenand and it's dated October 2026, so mark your calendars bestie — she's from the future and she's still locking OTP block areas 💜✨

📦 where this page comes from