STRUCT NFP_BPF_SUBPROG_INFO(9)

💅 struct nfp_bpf_subprog_info(9) 💅

okay so bestie, we're in the Kernel API Manual rn and this page is literally all about struct nfp_bpf_subprog_info — the little info blob for an nfp BPF sub-program (which is giving "function" energy, iykyk). it's small, it's iconic, it's the main character of exactly two fields. let's get into it 🫶

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✨ NAME ✨

struct nfp_bpf_subprog_info — nfp BPF sub-program (a.k.a. function) info. yes that's the whole name, no cap 💖

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🌸 SYNOPSIS 🌸

struct nfp_bpf_subprog_info {
    u16 stack_depth;
    u8 needs_reg_push : 1;
 };

look at her. two members. absolutely slaying the minimalism 💅

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🎀 Members 🎀

• stack_depth — the maximum stack depth this sub-program uses. like, how deep does the stack go? that's the number. u16, so she's got room 🌈
• needs_reg_push — a u8 bitfield that's exactly : 1 wide, and it answers the question: does this sub-program use callee-saved registers? if yes, this bit is doing the talking ✨

ngl, it's giving "small struct, big responsibilities." two fields, zero fluff, periodt 👑

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🦋 SEE ALSO 🦋

• Kernel file ./drivers/net/ethernet/netronome/nfp/bpf/main.h
• struct nfp_app_bpf(9)
• struct nfp_bpf_map(9)
• struct nfp_bpf_reg_state(9)
• struct nfp_insn_meta(9)
• struct nfp_prog(9)
• struct nfp_bpf_vnic(9)

go read those if you want the full lore, bestie — this struct does NOT exist in a vacuum 🧚

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aaaand that's the page! 💜 it's from ./drivers/net/ethernet/netrono..., dated October 2026, and it's filed under struct nfp_bpf_subprog_info(9) in case you need to find her again. mwah, study hard, drink water 💖🎀🦋