From b709e32ef570b8b91dfbcb63cffac4324c87799f Mon Sep 17 00:00:00 2001
From: Pingfan Liu <kernelfans@gmail.com>
Date: Thu, 22 Oct 2020 14:51:19 +0800
Subject: [PATCH] powerpc/time: Enable sched clock for irqtime

References: bsc#1156395
Patch-mainline: v5.12-rc1
Git-commit: b709e32ef570b8b91dfbcb63cffac4324c87799f

When CONFIG_IRQ_TIME_ACCOUNTING and CONFIG_VIRT_CPU_ACCOUNTING_GEN, powerpc
does not enable "sched_clock_irqtime" and can not utilize irq time
accounting.

Like x86, powerpc does not use the sched_clock_register() interface. So it
needs an dedicated call to enable_sched_clock_irqtime() to enable irq time
accounting.

Fixes: 518470fe962e ("powerpc: Add HAVE_IRQ_TIME_ACCOUNTING")
Signed-off-by: Pingfan Liu <kernelfans@gmail.com>
[mpe: Add fixes tag]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/1603349479-26185-1-git-send-email-kernelfans@gmail.com
Acked-by: Michal Suchanek <msuchanek@suse.de>
---
 arch/powerpc/kernel/time.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -53,6 +53,7 @@
 #include <linux/clk-provider.h>
 #include <linux/suspend.h>
 #include <linux/sched/cputime.h>
+#include <linux/sched/clock.h>
 #include <linux/processor.h>
 #include <asm/trace.h>
 
@@ -1030,6 +1031,7 @@ void __init time_init(void)
 #ifdef CONFIG_COMMON_CLK
 	of_clk_init(NULL);
 #endif
+	enable_sched_clock_irqtime();
 }
 
 /*
-- 
2.26.2