From 542a3f1a3cc19d971fdcc7fafd1ef19041508cfd Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Mon, 16 Oct 2023 10:05:03 +0200 Subject: [PATCH] Revert "kernel/sched: Modify initial boot task idle setup" This reverts commit 3569ad59664f9fa3ba1d02a78810773b7f49702b which is commit cff9b2332ab762b7e0586c793c431a8f2ea4db04 upstream. Joel writes: Let us drop this patch because it caused new tasks-RCU warnings (both normal and rude tasks RCU) in my stable test rig. We are discussing the "right fix" and at that time a backport can be done. Reported-by: Joel Fernandes Link: https://lore.kernel.org/r/CAEXW_YT6bH70M1TF2TttB-_kP=RUv_1nsy_sHYi6_0oCrX3mVQ@mail.gmail.com Cc: Liam R. Howlett Cc: Peter Zijlstra (Intel) Signed-off-by: Greg Kroah-Hartman --- kernel/sched/core.c | 2 +- kernel/sched/idle.c | 1 - 2 files changed, 1 insertion(+), 2 deletions(-) diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 02c91528127a..2324b7055260 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -8725,7 +8725,7 @@ void __init init_idle(struct task_struct *idle, int cpu) * PF_KTHREAD should already be set at this point; regardless, make it * look like a proper per-CPU kthread. */ - idle->flags |= PF_KTHREAD | PF_NO_SETAFFINITY; + idle->flags |= PF_IDLE | PF_KTHREAD | PF_NO_SETAFFINITY; kthread_set_per_cpu(idle, cpu); #ifdef CONFIG_SMP diff --git a/kernel/sched/idle.c b/kernel/sched/idle.c index 6b8d2169d9ea..499a3e286cd0 100644 --- a/kernel/sched/idle.c +++ b/kernel/sched/idle.c @@ -397,7 +397,6 @@ EXPORT_SYMBOL_GPL(play_idle_precise); void cpu_startup_entry(enum cpuhp_state state) { - current->flags |= PF_IDLE; arch_cpu_idle_prepare(); cpuhp_online_idle(state); while (1)