[patch 02/18] arm: Adjust system_state check

Thomas Gleixner tglx at linutronix.de
Sun May 14 11:27:18 PDT 2017


To enable smp_processor_id() and might_sleep() debug checks earlier, it's
required to add system states between SYSTEM_BOOTING and SYSTEM_RUNNING.

Adjust the system_state check in ipi_cpu_stop() to handle the extra states.

Signed-off-by: Thomas Gleixner <tglx at linutronix.de>
Cc: Russell King <linux at armlinux.org.uk>
Cc: linux-arm-kernel at lists.infradead.org
---
 arch/arm/kernel/smp.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -555,8 +555,7 @@ static DEFINE_RAW_SPINLOCK(stop_lock);
  */
 static void ipi_cpu_stop(unsigned int cpu)
 {
-	if (system_state == SYSTEM_BOOTING ||
-	    system_state == SYSTEM_RUNNING) {
+	if (system_state <= SYSTEM_RUNNING) {
 		raw_spin_lock(&stop_lock);
 		pr_crit("CPU%u: stopping\n", cpu);
 		dump_stack();





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