[patch 18/18] sched: Enable smp_processor_id() checks early

[Thomas Gleixner]

smp_processor_id() checks are enabled after the boot process is done. That
hides bugs in the smp bringup and driver initialization code.

Enable it right before the first non-boot CPU is brought up.

Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
 init/main.c            |    3 +++
 lib/smp_processor_id.c |    2 +-
 2 files changed, 4 insertions(+), 1 deletion(-)


Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
 init/main.c            |    3 +++
 lib/smp_processor_id.c |    2 +-
 2 files changed, 4 insertions(+), 1 deletion(-)

--- a/init/main.c
+++ b/init/main.c
@@ -1025,6 +1025,9 @@ static noinline void __init kernel_init_
 	 */
 	set_cpus_allowed_ptr(current, cpumask_of(raw_smp_processor_id()));
 
+	/* Enable smp_processor_id() checks */
+	system_state = SYSTEM_BOOTING_SMP;
+
 	cad_pid = task_pid(current);
 
 	smp_prepare_cpus(setup_max_cpus);
--- a/lib/smp_processor_id.c
+++ b/lib/smp_processor_id.c
@@ -28,7 +28,7 @@ notrace static unsigned int check_preemp
 	/*
 	 * It is valid to assume CPU-locality during early bootup:
 	 */
-	if (system_state != SYSTEM_RUNNING)
+	if (system_state < SYSTEM_BOOTING_SMP)
 		goto out;
 
 	/*