Commit 5976a669 authored May 16, 2017 by Thomas Gleixner Committed by Ingo Molnar May 23, 2017

arm: Adjust system_state check



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@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/20170516184735.020718977@linutronix.de


Signed-off-by: Ingo Molnar <mingo@kernel.org>

parent 8fb12156

arch/arm/kernel/smp.c

+1 −2

Original line number	Original line	Diff line number	Diff line
	@@ -555,8 +555,7 @@ static DEFINE_RAW_SPINLOCK(stop_lock);
	*/		*/
	static void ipi_cpu_stop(unsigned int cpu)		static void ipi_cpu_stop(unsigned int cpu)
	{		{
	if (system_state == SYSTEM_BOOTING \|\|		if (system_state <= SYSTEM_RUNNING) {
	system_state == SYSTEM_RUNNING) {
	raw_spin_lock(&stop_lock);		raw_spin_lock(&stop_lock);
	pr_crit("CPU%u: stopping\n", cpu);		pr_crit("CPU%u: stopping\n", cpu);
	dump_stack();		dump_stack();

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