dpm_prepare(9)

💅 dpm_prepare(9) — the Kernel API Manual glow-up 🎀

okay bestie, welcome to the dpm_prepare(9) page in the Kernel API Manual ✨ this is the one that gets all your non-sysdev devices ready for a system PM transition. yes, all of them. no cap.

---

✨ NAME ✨

dpm_prepare — prepare all non-sysdev devices for a system PM transition. 🦋

---

🫶 SYNOPSIS 🫶

int dpm_prepare (pm_message_t state );

that's it. one argument. one int coming back at you. iconic behavior honestly 💅

---

🌸 ARGUMENTS 🌸

• state — the PM transition of the system being carried out. like, which flavor of power management era we're in rn. keep it close, you'll need it 🔥

---

💖 DESCRIPTION 💖

so here's the vibe: dpm_prepare executes the ->prepare callback(s) for all devices. that's the whole assignment bestie, and it ate. 🍓

every device gets its ->prepare moment. the way that this is literally the prep step before everything else goes down... main character energy fr fr 👑

---

🌈 SEE ALSO 🌈

okay this list is LONG and I'm obsessed, buckle up bestie, we're going through all of it 💀

• Kernel file ./drivers/base/power/main.c
• pm_hibernate_is_recovering(9)
• device_pm_sleep_init(9)
• device_pm_lock(9)
• device_pm_unlock(9)
• device_pm_add(9)
• device_pm_remove(9)
• device_pm_move_before(9)
• device_pm_move_after(9)
• device_pm_move_last(9)
• dpm_wait(9)
• pm_op(9)
• pm_late_early_op(9)
• pm_noirq_op(9)
• dpm_watchdog_handler(9)
• dpm_watchdog_set(9)
• dpm_watchdog_clear(9)
• dev_pm_skip_resume(9)
• device_resume_noirq(9)
• dpm_resume_noirq(9)
• device_resume_early(9)
• dpm_resume_early(9)
• dpm_resume_start(9)
• device_resume(9)
• dpm_resume(9)
• device_complete(9)
• dpm_complete(9)
• dpm_resume_end(9)
• resume_event(9)
• device_suspend_noirq(9)
• dpm_suspend_noirq(9)
• device_suspend_late(9)
• dpm_suspend_late(9)
• dpm_suspend_end(9)
• legacy_suspend(9)
• device_suspend(9)
• dpm_suspend(9)
• device_prepare(9)
• dpm_suspend_start(9)
• device_pm_wait_for_dev(9)
• dpm_for_each_dev(9)

like I said. the whole squad. go read them all, iykyk 💜

---

ngl if you got this far you deserve a little treat, go hydrate and then go read device_prepare(9) because they're basically siblings 🧚

---

k bye bestie!! this page lives in ./drivers/base/power and it's stamped October 2026 — screenshot it, frame it, put it on your wall 🎀💅✨