linux-kernel - [tip:sched/core] arm: Adjust system

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Date:   Tue, 23 May 2017 01:48:15 -0700
From:   tip-bot for Thomas Gleixner <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     torvalds@...ux-foundation.org, rostedt@...dmis.org,
        peterz@...radead.org, mingo@...nel.org, linux@...linux.org.uk,
        linux-kernel@...r.kernel.org, hpa@...or.com,
        gregkh@...uxfoundation.org, mark.rutland@....com,
        tglx@...utronix.de
Subject: [tip:sched/core] arm: Adjust system_state check

Commit-ID:  5976a66913a8bf42465d96776fd37fb5631edc19
Gitweb:     http://git.kernel.org/tip/5976a66913a8bf42465d96776fd37fb5631edc19
Author:     Thomas Gleixner <tglx@...utronix.de>
AuthorDate: Tue, 16 May 2017 20:42:33 +0200
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Tue, 23 May 2017 10:01:35 +0200

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@...utronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Mark Rutland <mark.rutland@....com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Russell King <linux@...linux.org.uk>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: linux-arm-kernel@...ts.infradead.org
Link: http://lkml.kernel.org/r/20170516184735.020718977@linutronix.de
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/arm/kernel/smp.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 572a8df..c9a0a52 100644
--- 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();