crw_unregister_handler(9)

💅 crw_unregister_handler(9) — the kernel API manual, bestie edition

okay so picture this: it's giving kernel-level housekeeping, it's in the 9 section, and it's literally the un-registering half of a duo. yes bestie, this is a Linux kernel API page and we're gonna get through it together 🫶

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✨ NAME ✨

crw_unregister_handler — unregister a channel report word handler

like, you had a handler registered, and now you're ghosting it. respectfully. 👋

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🌸 SYNOPSIS 🌸

void crw_unregister_handler (int rsc );

that's it, that's the whole vibe. it returns void, so it's not gonna hand you back a value — it just does the thing. no receipts, no drama. 💀

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🎀 ARGUMENTS 🎀

• rsc — reporting source code to handle

yep, that's the one and only argument, and it's an int. it's the reporting source code you're pointing at — the handler for that is the one getting unregistered. main character integer energy, honestly. 👑

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🦋 SEE ALSO 🦋

• Kernel file ./drivers/s390/cio/crw.c
• crw_register_handler(9) — the other half of the story, aka the one that puts the handler in place. the way these two are literally a matched set 😭💖

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ngl bestie, the page itself doesn't spell out error codes, return values or side effects, so don't go making stuff up in your head — everything this function does is right here. lowkey iconic of it to be this concise. 💅

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and that's the whole page! 🌈 this little slice of kernel API manual lives over in ./drivers/s390/cio and it's dated October 2026 — so go forth, unregister responsibly, and slay ✨🍓

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