panic_nand_write(9)

📦 version 7.3.1, in nixpkgs unstable

okay so bestie, this is panic_nand_write, from section 9 of the Kernel API Manual, and it's giving emergency-write energy fr fr 💅

✨ NAME ✨

panic_nand_write — [MTD Interface] NAND write with ECC

🌸 SYNOPSIS 🌸

int panic_nand_write (struct mtd_info *mtd , loff_t to , size_t len ,
       size_t *retlen , const uint8_t *buf );

🎀 ARGUMENTS 🎀

  • mtd — the MTD device structure, the main character here
  • to — offset to write to, like where in the flash we're dropping the data
  • len — number of bytes to write, the size of the vibe
  • retlen — pointer to a variable that stores the number of written bytes, so you know how much actually landed
  • buf — the data to write, the payload itself

💖 DESCRIPTION 💖

So this is a NAND write with ECC, and the whole point is that it works when you're in interrupt context. Like, it's the emergency backup dancer of writes. The classic example? mtdoops calls this when it's writing an oops while the kernel is in panic. Yes, that kind of panic. The kernel is literally screaming and this function still shows up to write. Iconic, honestly.

ngl, if you're seeing this in a stack trace, something has gone very wrong and the kernel is doing its best to save the receipts before it all goes dark 💀

🔥 SEE ALSO 🔥

this came from ./drivers/mtd/nand/raw and it's dated October 2026, so yeah, that's the vibe. stay slaying bestie 💅✨

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