zcrypt_card_register(9)

✨ zcrypt_card_register 💅

okay bestie, welcome to the Kernel API Manual 🎀 — this one's a lil function from the s390 crypto corner of the kernel, and honestly? it's giving "small but mighty." let's get into it 🫶

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🌸 NAME 🌸

zcrypt_card_register — literally just registers a crypto card device. that's the whole vibe. no cap. ✨

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🦋 SYNOPSIS 🦋

int zcrypt_card_register (struct zcrypt_card *zc );

one function, one argument, returns an int. iconic minimalism tbh 👑

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🍓 ARGUMENTS 🍓

• zc — a pointer to a crypto card device 💳✨ like, the actual card struct you're trying to get registered. that's the main character here.

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💜 DESCRIPTION 💜

so what does it do? it registers a crypto card device. that's it, that's the tweet. 🐦

and the tea ☕: it returns 0 if it's successful. so if you see a 0 come back, you may absolutely celebrate, because that means it worked 🎉💖

fr fr, 0 = slay, anything else = go check what went wrong bestie 😭

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🔥 SEE ALSO 🔥

• the kernel file ./drivers/s390/crypto/zcrypt_card.c — go read the source, iykyk 👀
• zcrypt_card_unregister(9) — the breakup counterpart to this function 💔 (gotta unregister what you register, periodt)

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🌈 a lil sign-off 🌈

this page lives under ./drivers/s390/crypto, dated October 2026, from the Kernel API Manual — and that's the whole page, bestie. go register some cards responsibly 💅✨🫶