debugfs_create_u32_array(9)

📦 version 7.3.1, in nixpkgs unstable

✨ debugfs_create_u32_array ✨

So bestie, this one lives in the Kernel API Manual, and it's literally the glow-up you need when you want a u32 array just… readable from debugfs. Iconic behavior only. 💅

🎀 NAME 🎀

debugfs_create_u32_array — creates a debugfs file that's used to read a u32 array. That's the whole vibe. 🫶

🌸 SYNOPSIS 🌸

void debugfs_create_u32_array (const char *name , umode_t mode , struct
dentry *parent , struct debugfs_u32_array *array );

Like, that's the entire summoning ritual. Four args, zero drama. ✨

🦋 ARGUMENTS 🦋

  • name — a pointer to a string that holds the name of the file you're creating. Name your child wisely, okay? 💖
  • mode — the permission that the file should have. It's giving access-control realness. 🔐
  • parent — a pointer to the parent dentry for this file. If it's set, this should be a directory dentry, no cap. And if this parameter is NULL, then the file gets created in the root of the debugfs filesystem — main character energy, file edition. 👑
  • array — the wrapper struct containing the data pointer and the size of the array. Two for one, we love a bundle. 🎁

💜 DESCRIPTION 💜

So here's the tea: this function creates a file in debugfs with the given name that exports array as data. If the mode variable is so set, it can be read from. 📖

Writing? Not supported. Not even a little. 🙈

Seeking within the file? Also not supported. Sorry bestie, we don't do that here. 💀

And once array is created, its size can not be changed. Periodt. Locked in, frozen, no edits, the end. 🔒

🌈 SEE ALSO 🌈

Kernel file ./fs/debugfs/file.c — plus the whole friend group right here:

Ngl, it's a whole squad. Go read the others too, iykyk. 😭🔥

And that's a wrap, bestie! 🧚 This lil page came from source/version ./fs/debugfs, dated October 2026 — drink some water, go read a u32 array, and slay the rest of your kernel journey. 🍓💖⭐

📦 where this page comes from