crc_ccitt(9)

💅 crc_ccitt — the manual, but make it make sense

okay so bestie, welcome to the Kernel API Manual entry for crc_ccitt(9) — yes that "9" means it's a kernel thing, we're in the big leagues now 🫶

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✨ NAME ✨

crc_ccitt — recompute the CRC (CRC-CCITT variant) for the data buffer 🎀

like, literally it takes your buffer and redoes the checksum math on it. that's the whole vibe check.

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🌸 SYNOPSIS 🌸

u16 crc_ccitt (u16 crc , u8 const *buffer , size_t len );

look at her. three args, returns a u16. iconic. no cap.

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🦋 ARGUMENTS 🦋

• crc — the previous CRC value 💖 this is the one you're carrying in from before, bestie, not a fresh one
• buffer — data pointer ✨ literally where your bytes live
• len — number of bytes in the buffer 🌈 count them. carefully.

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🧚 SEE ALSO 🧚

• Kernel file ./lib/crc/crc-ccitt.c — the source, the origin story, the main character 👑

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ngl if you're poking at kernel CRC code you're already kind of slaying, just saying 💅

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and that's the page, periodt 🍓 source is ./lib/crc, dated October 2026, filed under crc_ccitt(9) — go forth and checksum responsibly, ily, bye 💜