fcs_compute10(9)

💅 fcs_compute10(9) — from the Kernel API Manual, bestie 🎀

okay so picture this: you're deep in the kernel, you've got a buffer, and you need to copy it and checksum it at the same time. that's literally this function's whole gig. welcome to the group chat ✨

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🌸 NAME 🌸

fcs_compute10 — it does a memcpy and calculates a 10 bit CRC across the buffer, all in one go. multitasking icon 🫶

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⭐ SYNOPSIS ⭐

__u16 fcs_compute10 (unsigned char *sp , int len , __u16 fcs );

look at her. three args, returns a __u16. no cap, that's the whole signature 💅

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🦋 ARGUMENTS 🦋

• sp — pointer to buffer. yes, the actual bytes, bestie. she needs somewhere to look 👀
• len — number of bytes. how much of the buffer we're dealing with, fr fr
• fcs — starting FCS. you hand her a value to kick things off with 💖

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🔥 DESCRIPTION 🔥

so here's the vibe: fcs_compute10 performs a memcpy and calculates the fcs using the ppp 10bit CRC algorithm. both. at once. main character energy 👑

and what does she give you back? the new 10 bit FCS. that's the return value, periodt. 🎀

ngl, it's giving "small function, big responsibilities." she copies and checksums, so you don't have to do it in two separate steps 🌈

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👑 SEE ALSO 👑

• Kernel file ./drivers/usb/serial/safe_serial.c — go read it if you want to see where this energy lives, iykyk 📂✨

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and that's the whole page, bestie 🧚 this one came out of the ./drivers/usb/serial directory, dated October 2026 — so like, mark your calendars? no? okay. anyway, go forth and checksum responsibly 💜🍓