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From 55974977523c2c5089613549ea51c007d7a71b40 Mon Sep 17 00:00:00 2001
From: Dom Cobley <popcornmix@gmail.com>
Date: Thu, 16 Mar 2023 14:41:16 +0000
Subject: [PATCH] reboot: Use power off rather than busy spinning when
halt is requested
Busy spinning after halt is dumb
We've previously applied this patch to arch/arm
but it is currenltly missing in arch/arm64
Pi4 after "sudo halt" uses 520mA
Pi4 after "sudo shutdown now" uses 310mA
Make them both use the lower powered option
Signed-off-by: Dom Cobley <popcornmix@gmail.com>
---
arch/arm64/kernel/process.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
--- a/arch/arm64/kernel/process.c
+++ b/arch/arm64/kernel/process.c
@@ -96,9 +96,7 @@ void machine_shutdown(void)
*/
void machine_halt(void)
{
- local_irq_disable();
- smp_send_stop();
- while (1);
+ machine_power_off();
}
/*
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