This is a note to let you know that I've just added the patch titled powerpc/time: Enable sched clock for irqtime to the 5.10-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: powerpc-time-enable-sched-clock-for-irqtime.patch and it can be found in the queue-5.10 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 1f94c5ca63ed76ad106ba2fdccc5e6c75ef5b054 Author: Pingfan Liu <kernelfans@xxxxxxxxx> Date: Thu Oct 22 14:51:19 2020 +0800 powerpc/time: Enable sched clock for irqtime [ Upstream 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@xxxxxxxxx> [mpe: Add fixes tag] Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx> Link: https://lore.kernel.org/r/1603349479-26185-1-git-send-email-kernelfans@xxxxxxxxx Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c index 7d372ff3504b2..1d20f0f77a920 100644 --- a/arch/powerpc/kernel/time.c +++ b/arch/powerpc/kernel/time.c @@ -53,6 +53,7 @@ #include <linux/of_clk.h> #include <linux/suspend.h> #include <linux/sched/cputime.h> +#include <linux/sched/clock.h> #include <linux/processor.h> #include <asm/trace.h> @@ -1095,6 +1096,7 @@ void __init time_init(void) tick_setup_hrtimer_broadcast(); of_clk_init(NULL); + enable_sched_clock_irqtime(); } /*