STRUCT FME_PERF_PRIV(9)

💅 struct fme_perf_priv(9) — Kernel API Manual, bestie edition 🎀

okay so real talk, this is a page from the Kernel API Manual and it's all about struct fme_perf_priv, no cap. it's giving "small but mighty struct energy" and honestly? we're obsessed. 🦋

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✨ NAME ✨

struct fme_perf_priv — the priv data structure for the fme perf driver. that's it, that's the whole vibe. 💖

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🌸 SYNOPSIS 🌸

struct fme_perf_priv {
    struct device *dev;
    void __iomem *ioaddr;
    struct pmu pmu;
    u16 id;
    u32 fab_users;
    u32 fab_port_id;
    spinlock_t fab_lock;
    unsigned int cpu;
    struct hlist_node node;
    enum cpuhp_state cpuhp_state;
 };

look at her. ten fields. literally the main character of the fme perf driver. ✨ copy this exactly, don't @ me.

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🫶 Members 🫶

• dev — the parent device. the mom friend of the struct, fr fr. 💖
• ioaddr — the mapped base address of the mmio region. that's where the memory-mapped magic lives, iykyk. ✨
• pmu — the pmu data structure for fme perf counters. it's the whole reason we're here honestly. 👑
• id — the id of this fme performance report private feature. yes, an id. for this specific feature. unique-ish queen. 🎀
• fab_users — current user number on fabric counters. like a headcount but for counters. 🔥
• fab_port_id — used to indicate current working mode of fabric counters. it tells you what mode we're in, slay. 🌈
• fab_lock — lock to protect fabric counters working mode. do NOT skip the lock, bestie, that's how you get chaos. 💀
• cpu — the active CPU to which the PMU is bound for accesses. one CPU, specially chosen, living its best life. ⭐
• node — node for the CPU hotplug notifier link. it's how we stay connected when CPUs get hot-plugged. 🧚
• cpuhp_state — state for CPU hotplug notification; yes it ends with a semicolon, that's just how the original rolls, no notes. 🙈

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👀 SEE ALSO 👀

• Kernel file ./drivers/fpga/dfl-fme-perf.c — literally the source, go read it, it ate. 💅
• struct fme_perf_event_ops(9) — the sibling struct, also iconic, check her out too. 💜

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lowkey important reminder: every field, every type, every name above stays exactly as written. this struct does not get a rebrand. periodt. ✨

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so yeah, that's the whole page, bestie — from ./drivers/fpga with love, dated October 2026, brought to you by the Kernel API Manual. stay slay, keep your locks held, and see you in the next struct. 🍓💖🎀