snd_ctl_reg...ioctl_compat(9)

💅 snd_ctl_register_ioctl_compat — bestie edition 🎀

okay so this is from the Kernel API Manual (yes, the kernel has lore too ✨) and it's literally the page for snd_ctl_register_ioctl_compat(9). Buckle up bestie, it's short and sweet 🍓

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🦋 NAME 🦋

snd_ctl_register_ioctl_compat — the one that registers the device-specific 32bit compat control-ioctls 👑 no cap, that's the whole job.

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✨ SYNOPSIS ✨

int snd_ctl_register_ioctl_compat (snd_kctl_ioctl_func_t fcn );

it's giving "one function, one argument, zero drama" 💅

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🌸 ARGUMENTS 🌸

• fcn — your ioctl callback function 🫶 like, hand her the function pointer and she'll take it from there.

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⭐ RETURN ⭐

• returns zero if everything slayed ✅
• or a negative error code if it did not slay 😭 (negative = bad vibes, you already knew that)

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💖 SEE ALSO 💖

the whole friend group, fr fr — plus the kernel file ./sound/core/control.c where all this lives 🏠

• snd_ctl_notify(9)
• snd_ctl_notify_one(9)
• snd_ctl_new(9)
• snd_ctl_new1(9)
• snd_ctl_free_one(9)
• snd_ctl_add(9)
• snd_ctl_replace(9)
• snd_ctl_remove(9)
• snd_ctl_remove_id(9)
• snd_ctl_remove_user_ctl(9)
• snd_ctl_activate_id(9)
• snd_ctl_rename_id(9)
• snd_ctl_rename(9)
• snd_ctl_find_numid(9)
• snd_ctl_find_id(9)
• snd_ctl_register_ioctl(9)
• snd_ctl_unregister_ioctl(9)
• snd_ctl_unregister_ioctl_compat(9)
• snd_ctl_request_layer(9)
• snd_ctl_register_layer(9)
• snd_ctl_disconnect_layer(9)
• snd_ctl_boolean_mono_info(9)
• snd_ctl_boolean_stereo_info(9)
• snd_ctl_enum_info(9)

ngl if you're calling snd_ctl_register_ioctl_compat there's a solid chance you also need her sister snd_ctl_unregister_ioctl_compat(9) — she's right there in the list, iykyk 💀

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okay that's the whole page, it ate and left no crumbs 🌈 this came out of ./sound/core and the date stamp on it is October 2026 ⭐ stay hydrated, read your kernel docs, periodt 💜🦋