5.15-stable review patch. If anyone has any objections, please let me know.
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From: Greg Kroah-Hartman gregkh@linuxfoundation.org
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 joel@joelfernandes.org Link: https://lore.kernel.org/r/CAEXW_YT6bH70M1TF2TttB-_kP=RUv_1nsy_sHYi6_0oCrX3mV... Cc: Liam R. Howlett Liam.Howlett@oracle.com Cc: Peter Zijlstra (Intel) peterz@infradead.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- kernel/sched/core.c | 2 +- kernel/sched/idle.c | 1 - 2 files changed, 1 insertion(+), 2 deletions(-)
--- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -8725,7 +8725,7 @@ void __init init_idle(struct task_struct * 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 --- 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)