From 15faafc6b449777a85c0cf82dd8286c293fed4eb Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Mon, 31 May 2021 12:21:13 +0200 Subject: sched,init: Fix DEBUG_PREEMPT vs early boot Extend 8fb12156b8db ("init: Pin init task to the boot CPU, initially") to cover the new PF_NO_SETAFFINITY requirement. While there, move wait_for_completion(&kthreadd_done) into kernel_init() to make it absolutely clear it is the very first thing done by the init thread. Fixes: 570a752b7a9b ("lib/smp_processor_id: Use is_percpu_thread() instead of nr_cpus_allowed") Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Valentin Schneider Tested-by: Valentin Schneider Tested-by: Borislav Petkov Link: https://lkml.kernel.org/r/YLS4mbKUrA3Gnb4t@hirez.programming.kicks-ass.net --- kernel/sched/core.c | 1 + 1 file changed, 1 insertion(+) (limited to 'kernel') diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 3d2527239c3e..e205c191b7fb 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -8862,6 +8862,7 @@ void __init sched_init_smp(void) /* Move init over to a non-isolated CPU */ if (set_cpus_allowed_ptr(current, housekeeping_cpumask(HK_FLAG_DOMAIN)) < 0) BUG(); + current->flags &= ~PF_NO_SETAFFINITY; sched_init_granularity(); init_sched_rt_class(); -- cgit v1.3-14-g43fede