media_devnod...ster_prepare(9)

💅 NAME

media_devnode_unregister_prepare — bestie, this is the one that clears the media device node register bit so the node knows it's ✨ leaving ✨

Welcome to the Kernel API Manual, pull up a chair 🎀

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✨ SYNOPSIS ✨

void media_devnode_unregister_prepare (struct media_devnode *devnode );

🫶 ARGUMENTS

• devnode — the device node you're getting ready to unregister. that's it. that's the whole argument bestie 💖

🔥 DESCRIPTION 🔥

okay so basically this function clears the passed device register bit. and like, that's a big deal, because the way that it works means future open calls will be met with errors 💀 so anyone trying to open the thing after this point is gonna get told no. respectfully.

so you should call this before media_devnode_unregister to avoid races with unregister and device file open calls. no cap, that ordering is the whole point — this is your "hey besties, the party's wrapping up 🎀" announcement so nobody walks in mid-teardown and gets weird about it.

and here's the slay part: this function can safely be called if the device node has never been registered or has already been unregistered. so if you're sitting there like "wait did I already do this 😭" — you're fine. call it. it's chill. genuinely iconic behaviour tbh 👑

ngl this one is the prepare step — it does not finish the job. it just sets the vibe so the real unregister doesn't get caught in a race. do not skip it, fr fr 🙈

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👀 SEE ALSO 👀

• Kernel file ./include/media/media-devnode.h
• struct media_file_operations(9)
• struct media_devnode(9)
• media_devnode_register(9)
• media_devnode_unregister(9)
• media_devnode_data(9)
• media_devnode_is_registered(9)

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🌸 ok that's the whole page bestie, go clear that register bit, you're gonna do amazing 💜

sign-off time: this lil masterpiece lives in ./include/media and it's dated October 2026 — a whole era ⭐ 🦋 you're welcome, mwah 💅