STRUCT TT_THERMAL_ZONE(9)

💅 struct tt_thermal_zone(9) 💅

okay so bestie, welcome to the Kernel API Manual ✨ — today's main character is struct tt_thermal_zone, and honestly? it's giving template energy. Let's get into it 🫶

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🌸 NAME 🌸

struct tt_thermal_zone — the Testing thermal zone template 🎀

Like, it's a template. For thermal zones. For testing. iykyk 💀

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✨ SYNOPSIS ✨

struct tt_thermal_zone {
    struct list_head list_node;
    struct list_head trips;
    struct dentry *d_tt_zone;
    struct thermal_zone_device *tz;
    struct mutex lock;
    struct ida ida;
    int id;
    int temp;
    int tz_temp;
    unsigned int num_trips;
    unsigned int refcount;
 };

literally the whole shape of it, no cap 👑

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🦋 Members 🦋

okay so every single field, one by one, because we do NOT skip 💅

• list_node — this one's the node in the list of all testing thermal zone templates. it's in the group chat 📋
• trips — the list of trip point templates that belong to this thermal zone template. lil trip squad 🌈
• d_tt_zone — a directory in debugfs that represents this template. it's the template's own little room 🚪
• tz — the test thermal zone built on this template, if present. key words: if present 🙈
• lock — a mutex that synchronizes changes to this template. no two besties editing at once, periodt 🔒
• ida — the IDA for trip point IDs. yes it's literally named ida, yes it's an ID allocator 🎀
• id — the ID of this template, used by the debugfs interface. its whole government name 🪪
• temp — a temperature value. that's it. that's the field 🌡️
• tz_temp — the current thermal zone temperature, and this one only shows up after registration. post-glow-up temperature ✨
• num_trips — how many trip points are chilling in the trips list. a headcount 🔢
• refcount — reference counter for usage and removal synchronization. keeps everyone from leaving the party at the same time 😭

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💖 Description 💖

so what is it? it represents a template of a thermal zone — and that template can be used for registering a test thermal zone with the thermal core 🔥

that's the whole vibe. a template. a test zone. the thermal core. iconic behavior tbh 👑

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⭐ SEE ALSO ⭐

• Kernel file ./drivers/thermal/testing/zone.c 🗂️
• struct tt_trip(9) 🧚

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aaaand that's the page, bestie 💜 it came from the ./drivers/thermal/testing source, dated October 2026, and it's filed under struct tt_thermal_zone(9) — slay, no notes 🎀💅✨