38 lines
1.4 KiB
Diff
38 lines
1.4 KiB
Diff
From: Thomas Gleixner <tglx@linutronix.de>
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Date: Tue, 16 May 2017 20:42:33 +0200
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Subject: [PATCH 02/17] arm: Adjust system_state check
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Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.11/older/patches-4.11.8-rt5.tar.xz
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To enable smp_processor_id() and might_sleep() debug checks earlier, it's
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required to add system states between SYSTEM_BOOTING and SYSTEM_RUNNING.
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Adjust the system_state check in ipi_cpu_stop() to handle the extra states.
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Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
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Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Cc: Linus Torvalds <torvalds@linux-foundation.org>
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Cc: Mark Rutland <mark.rutland@arm.com>
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Cc: Peter Zijlstra <peterz@infradead.org>
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Cc: Russell King <linux@armlinux.org.uk>
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Cc: Steven Rostedt <rostedt@goodmis.org>
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Cc: linux-arm-kernel@lists.infradead.org
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Link: http://lkml.kernel.org/r/20170516184735.020718977@linutronix.de
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Signed-off-by: Ingo Molnar <mingo@kernel.org>
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---
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arch/arm/kernel/smp.c | 3 +--
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1 file changed, 1 insertion(+), 2 deletions(-)
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--- a/arch/arm/kernel/smp.c
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+++ b/arch/arm/kernel/smp.c
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@@ -555,8 +555,7 @@ static DEFINE_RAW_SPINLOCK(stop_lock);
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*/
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static void ipi_cpu_stop(unsigned int cpu)
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{
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- if (system_state == SYSTEM_BOOTING ||
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- system_state == SYSTEM_RUNNING) {
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+ if (system_state <= SYSTEM_RUNNING) {
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raw_spin_lock(&stop_lock);
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pr_crit("CPU%u: stopping\n", cpu);
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dump_stack();
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