pm_runtime_barrier(9)

💖 NAME 💖

okay so this is the manual page for pm_runtime_barrier(9) from the Kernel API Manual, and bestie it is literally here to flush pending requests and wait for completions. periodt 💅

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✨ SYNOPSIS ✨

void pm_runtime_barrier (struct device *dev );

no cap, it returns void, so there's no return value to obsess over. 🫶

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🎀 ARGUMENTS 🎀

• dev — the device to handle. that's the one, bestie 🎀

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🦋 DESCRIPTION 🦋

okay so here's the vibe: this function prevents the device from being suspended by incrementing its usage counter, and if there's a pending resume request for the device, it wakes the device up. 🌸

Next, it makes sure that all pending requests for the device have been flushed from pm_wq, and it waits for all runtime PM operations involving the device in progress to complete. like, all of them. fully done. no leftovers. ✨

iykyk: this is the "flush the pending stuff and wait for the in-progress runtime PM ops to finish" moment. main character energy for real. 💀

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👀 SEE ALSO 👀

• Kernel file: ./drivers/base/power/runtime.c
• the SEE ALSO squad, part one: update_pm_runtime_accounting(9), pm_runtime_deactivate_timer(9), pm_runtime_cancel_pending(9), rpm_check_suspend_allowed(9), pm_runtime_release_supplier(9), __rpm_callback(9), rpm_callback(9), rpm_idle(9), rpm_suspend(9), rpm_resume(9)
• the SEE ALSO squad, part two: pm_runtime_work(9), pm_suspend_timer_fn(9), pm_schedule_suspend(9), __pm_runtime_idle(9), __pm_runtime_suspend(9), __pm_runtime_resume(9), pm_runtime_get_conditional(9), pm_runtime_get_if_active(9), pm_runtime_get_if_in_use(9), __pm_runtime_set_status(9)
• the SEE ALSO squad, part three: __pm_runtime_barrier(9), pm_runtime_enable(9), devm_pm_runtime_set_active_enabled(9), devm_pm_runtime_enable(9), devm_pm_runtime_get_noresume(9), pm_runtime_forbid(9), pm_runtime_allow(9), pm_runtime_no_callbacks(9), pm_runtime_irq_safe(9), update_autosuspend(9)
• the SEE ALSO squad, part four: pm_runtime_set_autosuspend_delay(9), __pm_runtime_use_autosuspend(9), pm_runtime_init(9), pm_runtime_reinit(9), pm_runtime_remove(9), pm_runtime_get_suppliers(9), pm_runtime_put_suppliers(9), pm_runtime_drop_link(9), pm_runtime_force_suspend(9), pm_runtime_force_resume(9)

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k bye bestie — this page's source/version is ./drivers/base/power, and the date on it is October 2026. mwah 💋✨