cpufreq_notify_transition(9)

🌸 NAME 🌸

okay bestie, welcome to the cpufreq_notify_transition(9) page from the Kernel API Manual 💅✨

cpufreq_notify_transition — notify a frequency transition and adjust jiffies, fr fr 🎀

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💅 SYNOPSIS 💅

like, here's the exact signature, no cap:

void cpufreq_notify_transition (struct cpufreq_policy *policy , struct
       cpufreq_freqs *freqs , unsigned int state );

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🎀 ARGUMENTS 🎀

• policy — the cpufreq policy you're enabling fast frequency switching for. she's giving main character energy 👑
• freqs — contains details of the frequency update. all the tea ☕
• state — set to CPUFREQ_PRECHANGE or CPUFREQ_POSTCHANGE. pick your moment bestie ⏰

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🦋 DESCRIPTION 🦋

so what does this icon actually do? it calls the transition notifiers and adjust_jiffies 💖 that's the vibe.

and hear me out: it is called twice on all CPU frequency changes that have external effects. twice! not once! the way that's important 😭🔥

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🌈 SEE ALSO 🌈

the kernel file is ./drivers/cpufreq/cpufreq.c, and the whole friend group is:

• cpufreq_cpu_get(9)
• cpufreq_cpu_put(9)
• adjust_jiffies(9)
• cpufreq_enable_fast_switch(9)
• cpufreq_disable_fast_switch(9)
• cpufreq_driver_resolve_freq(9)
• cpufreq_parse_governor(9)
• cpufreq_add_dev(9)
• cpufreq_out_of_sync(9)
• cpufreq_quick_get(9)
• cpufreq_quick_get_max(9)
• cpufreq_get_hw_max_freq(9)
• cpufreq_get(9)
• cpufreq_suspend(9)
• cpufreq_resume(9)
• cpufreq_driver_test_flags(9)
• cpufreq_get_current_driver(9)
• cpufreq_get_driver_data(9)
• cpufreq_register_notifier(9)
• cpufreq_unregister_notifier(9)
• cpufreq_driver_fast_switch(9)
• cpufreq_driver_adjust_perf(9)
• cpufreq_driver_has_adjust_perf(9)
• cpufreq_update_pressure(9)
• cpufreq_set_policy(9)
• cpufreq_update_policy(9)
• cpufreq_update_limits(9)
• cpufreq_register_driver(9)

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💖 that's it bestie! the footer energy is ./drivers/cpufreq + October 2026 + cpufreq_notify_transition(9). mwah 🫶✨