STRUCT RS_CODEC(9)

💅 struct rs_codec — rs codec data

okay so bestie, welcome to the kernel API manual for struct rs_codec — this is literally the struct that holds all the rs codec data, and she is that girl. every field, every type, all of it, coming right up ✨

✨ SYNOPSIS ✨

here's the whole glow-up, character for character, don't touch a thing:

struct rs_codec {
    int mm;
    int nn;
    uint16_t *alpha_to;
    uint16_t *index_of;
    uint16_t *genpoly;
    int nroots;
    int fcr;
    int prim;
    int iprim;
    int gfpoly;
    int (*gffunc)(int);
    int users;
    struct list_head list;
 };

🎀 MEMBERS 🎀

time for the vibe check on every single member — no skipping, we don't do that here 🫶

• mm — bits per symbol. that's it, that's the whole thing 💅
• nn — symbols per block, and it equals (1<<mm)-1. yeah, the math is mathing 🔥
• alpha_to — the log lookup table. iconic little lookup table behavior.
• index_of — the antilog lookup table. she's the sister of alpha_to, they come as a pair 💖
• genpoly — the generator polynomial. main character energy fr fr ✨
• nroots — number of generator roots, which also equals the number of parity symbols. two things at once, she's multitasking 👑
• fcr — first consecutive root, in index form.
• prim — primitive element, in index form.
• iprim — the prim-th root of 1, in index form. ok that's lowkey gorgeous 🌸
• gfpoly — the primitive generator polynominal (spelled exactly like that, no cap 💀).
• gffunc — function to generate the field, if it's a non-canonical representation. it's literally int (*gffunc)(int);, so yes, she takes an int and hands you back an int 🦋
• users — the users of this structure. love that for her, she has a fanbase 🥰
• list — list entry for the rs codec list. keeping everything linked up and organized, we stan 🎀

💜 SEE ALSO 💜

go read these next, iykyk:

• Kernel file ./include/linux/rslib.h
• struct rs_control(9)
• init_rs(9)

okay that's the whole page, you ate that 🍓 this little number lives over in ./include/linux, and it's dated October 2026 — October 2026 bestie, she's from the future and she's still serving 💅✨ bye mwah 😭💖