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50 lines
1.2 KiB
Diff
50 lines
1.2 KiB
Diff
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From 7b4fcaaaf4d7081c4c1be24b4961f59e14e2af6c Mon Sep 17 00:00:00 2001
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From: popcornmix <popcornmix@gmail.com>
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Date: Tue, 5 Apr 2016 19:40:12 +0100
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Subject: [PATCH 0074/1085] reboot: Use power off rather than busy spinning
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when halt is requested
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reboot: Use power off rather than busy spinning when halt is requested
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Busy spinning after halt is dumb
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We've previously applied this patch to arch/arm
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but it is currenltly missing in arch/arm64
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Pi4 after "sudo halt" uses 520mA
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Pi4 after "sudo shutdown now" uses 310mA
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Make them both use the lower powered option
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Signed-off-by: Dom Cobley <popcornmix@gmail.com>
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---
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arch/arm/kernel/reboot.c | 4 +---
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arch/arm64/kernel/process.c | 4 +---
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2 files changed, 2 insertions(+), 6 deletions(-)
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--- a/arch/arm/kernel/reboot.c
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+++ b/arch/arm/kernel/reboot.c
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@@ -102,9 +102,7 @@ void machine_shutdown(void)
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*/
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void machine_halt(void)
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{
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- local_irq_disable();
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- smp_send_stop();
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- while (1);
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+ machine_power_off();
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}
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/*
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--- a/arch/arm64/kernel/process.c
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+++ b/arch/arm64/kernel/process.c
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@@ -96,9 +96,7 @@ void machine_shutdown(void)
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*/
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void machine_halt(void)
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{
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- local_irq_disable();
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- smp_send_stop();
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- while (1);
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+ machine_power_off();
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}
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/*
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