debugfs_create_atomic_t(9)

📦 version 7.3.1, in nixpkgs unstable

💅 debugfs_create_atomic_t — the Kernel API Manual said let me introduce you 🎀

okay bestie, buckle up, because this one is genuinely so useful. debugfs_create_atomic_t is the function that creates a debugfs file that is used to read and write an atomic_t value ✨ that's it, that's the whole vibe — you get a cute lil file up in debugfs, and when somebody reads it or writes to it, it's talking directly to your atomic_t. no cap, it's giving "magic window into a kernel variable" energy 💖

✨ SYNOPSIS ✨

void debugfs_create_atomic_t (const char *name , umode_t mode , struct
dentry *parent , atomic_t *value );

literally just call it with those four things and you're done, iykyk 🫶

🌸 ARGUMENTS 🌸

  • name — a pointer to a string containing the name of the file to create. yes it's just the filename bestie, pick something cute-ish but like, at least a little descriptive 💅
  • mode — the permission that the file should have. like, who's allowed to read and write it, you know the drill 🎀
  • parent — a pointer to the parent dentry for this file. this should be a directory dentry if it's set. and if this parameter is NULL?? then the file will be created in the root of the debugfs filesystem — main character energy, no parent, just vibing at the top level 🌈
  • value — a pointer to the variable that the file should read to and write from. this is the whole point, this is the icon, this is the atomic_t we're all here for 👑
ngl the NULL parent thing is genuinely handy but do try not to unleash a million files into the debugfs root, it's a whole aesthetic 💀

🦋 SEE ALSO 🦋

the kernel file is ./fs/debugfs/file.c and honestly it's the friend group, here's the whole crew:

and that's the whole page, bestie 🧚 oh and before i forget — the footer energy: this one lives in ./fs/debugfs, it's dated October 2026, and the title is debugfs_create_atomic_t(9) from the Kernel API Manual. slay, go forth and debug 💜🔥

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