smu_wbrf_event_handler(9)

💅 smu_wbrf_event_handler(9) — a Kernel API Manual moment

okay so like... welcome to the Kernel API Manual page for smu_wbrf_event_handler(9), bestie. this is the little function that literally handles notify events and we're gonna get into it 💖

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✨ NAME ✨

smu_wbrf_event_handler — handle notify events 🫶

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✨ SYNOPSIS ✨

int smu_wbrf_event_handler (struct notifier_block *nb , unsigned long
action , void *_arg );

yes that's the whole signature, no cap. int going in, three args, we move 💅

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✨ ARGUMENTS ✨

• nb — the notifier block 🎀
• action — the event type, like what kind of event are we even dealing with
• _arg — the event data, the little payload that comes along for the ride

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✨ DESCRIPTION ✨

so basically? it calls the relevant amdgpu function in response to a wbrf event notification coming from the kernel. that's the whole vibe. kernel says "hey, wbrf event", this handler says "say less" and calls the right amdgpu thing 🔥

no extra lore, that's literally it. iconic behavior honestly 👑

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🌈 SEE ALSO 🌈

kernel file: ./drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c

and the whole friend group of related pages, go read these too:

• smu_dpm_set_power_gate(9)
• smu_set_user_clk_dependencies(9)
• smu_restore_dpm_user_profile(9)
• smu_alloc_memory_pool(9)
• smu_wbrf_handle_exclusion_ranges(9)
• smu_wbrf_delayed_work_handler(9)
• smu_wbrf_support_check(9)
• smu_wbrf_init(9)
• smu_wbrf_fini(9)
• smu_get_ppt_limit(9)
• smu_reset_sdma_is_supported(9)

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ok that's the page!! sourced from ./drivers/gpu/drm/amd/pm/swsmu, dated October 2026 — mwah, go forth and handle those notify events bestie 🦋💜