snd_ctl_add(9)

📦 version 7.3.1, in nixpkgs unstable

💖 snd_ctl_add(9) 💖

okay bestie, so this is a page from the Kernel API Manual — yes the actual kernel, she's iconic — and we're talking about snd_ctl_add(9). grab a strawberry drink and let's get into it 🍓✨

✨ NAME ✨

snd_ctl_add — add the control instance to the card 🎀

🌸 SYNOPSIS 🌸

int snd_ctl_add (struct snd_card *card , struct snd_kcontrol *kcontrol );

like, that's the whole vibe check right there 💅

🦋 ARGUMENTS 🦋

  • card — the card instance 💳 (yes, the actual card, main character energy)
  • kcontrol — the control instance to add 🎛️ the little guy you're introducing to the card

💜 DESCRIPTION 💜

so what it does is: it adds the control instance — the one you made with snd_ctl_new or snd_ctl_new1 — to the given card. easy. 🫶

and like, it also assigns a unique numid to it, which is literally used for fast search. no cap, it's giving efficiency queen 👑

⚠️ important caveat bestie: it frees automatically the control which cannot be added. so if it doesn't make it in, it's gone-gone 😭 don't go using it after, fr fr 💀

⭐ RETURN ⭐

zero if successful 🎉 — or a negative error code on failure 🙈 (so, check it, please, i'm begging)

🌈 SEE ALSO 🌈

kernel file ./sound/core/control.c — that's where the magic lives, iykyk

and the whole friend group 💖:

okay that's the whole page, you ate that 💅✨

and a lil sign-off for the credits bestie: this one lives in <pink>./sound/core</pink> and it's dated October 2026 — periodt, that's the tea 🎀🦋💖

📦 where this page comes from