register_sound_mixer(9)

📦 version 7.3.1, in nixpkgs unstable

✨ register_sound_mixer(9) ✨

okay bestie, welcome to the Kernel API Manual 💖 this is the page for register_sound_mixer and it's literally the moment your driver gets its own mixer device. no cap, it's giving "small function, big main character energy" 🎀

🌸 NAME 🌸

register_sound_mixer — register a mixer device 💅

🦋 SYNOPSIS 🦋

int register_sound_mixer (const struct file_operations *fops , int dev );

🎀 ARGUMENTS 🎀

  • fops — the file operations for your driver, i.e. all the struct file_operations goodness that tells the kernel how to actually talk to your thing 🫶
  • dev — the unit number you wanna allocate, bestie. this is which slot you're asking for 🔢

✨ DESCRIPTION ✨

So what this does is allocate a mixer device 🌈 The unit is the number of the mixer you're requesting — like, "hey kernel, gimme mixer number this one" 👑

And here's the iconic part: if you pass -1, you're asking for the next free mixer unit instead of a specific one. very "surprise me, i trust you" energy fr fr 💜

🔥 RETURN 🔥

  • On success? the allocated number comes back to you, slay 🎉
  • On failure? you get a negative error code, and yeah that's your vibe check failing 😭

💀 SEE ALSO 💀

go read those too, iykyk 🧚

ngl, if your registration fails you're getting a negative number back — that's not a unit number, that's a no, so don't go treating it like one 🙈

okay that's the whole page!! this one's from ./sound, dated October 2026 — mwah, bye bestie, go register that mixer 👑💖🌸

📦 where this page comes from