rpi4: boot: Update the firmwares for kernel v5.15.82 (fix booting issue)

[platform/kernel/linux-rpi.git] / kernel / smp.c

diff --git a/kernel/smp.c b/kernel/smp.c
index 8282534..9d3c8c5 100644 (file)
--- a/kernel/smp.c
+++ b/kernel/smp.c
@@ -690,10 +690,20 @@ void flush_smp_call_function_from_idle(void)
 
        cfd_seq_store(this_cpu_ptr(&cfd_seq_local)->idle, CFD_SEQ_NOCPU,
                      smp_processor_id(), CFD_SEQ_IDLE);
+
        local_irq_save(flags);
        flush_smp_call_function_queue(true);
-       if (local_softirq_pending())
-               do_softirq();
+
+       if (local_softirq_pending()) {
+               if (!IS_ENABLED(CONFIG_PREEMPT_RT)) {
+                       do_softirq();
+               } else {
+                       struct task_struct *ksoftirqd = this_cpu_ksoftirqd();
+
+                       if (ksoftirqd && !task_is_running(ksoftirqd))
+                               wake_up_process(ksoftirqd);
+               }
+       }
 
        local_irq_restore(flags);
 }