| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.8 022/140] parisc: Fix self-detected CPU stall warnings on Mako machines | Date | Wed, 26 Oct 2016 14:21:22 +0200 |
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4.8-stable review patch. If anyone has any objections, please let me know.
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From: Helge Deller <deller@gmx.de>
commit 92420bd0d01f040bbf754e1d090be49ca6a1c8d6 upstream.
The config option HAVE_UNSTABLE_SCHED_CLOCK is set automatically when compiling for SMP. There is no need to clear the stable-clock flag via clear_sched_clock_stable() when starting secondary CPUs, and even worse, clearing it triggers wrong self-detected CPU stall warnings on 64bit Mako machines.
Signed-off-by: Helge Deller <deller@gmx.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- arch/parisc/kernel/time.c | 6 ------ 1 file changed, 6 deletions(-)
--- a/arch/parisc/kernel/time.c +++ b/arch/parisc/kernel/time.c @@ -226,12 +226,6 @@ void __init start_cpu_itimer(void) unsigned int cpu = smp_processor_id(); unsigned long next_tick = mfctl(16) + clocktick; -#if defined(CONFIG_HAVE_UNSTABLE_SCHED_CLOCK) && defined(CONFIG_64BIT) - /* With multiple 64bit CPUs online, the cr16's are not syncronized. */ - if (cpu != 0) - clear_sched_clock_stable(); -#endif - mtctl(next_tick, 16); /* kick off Interval Timer (CR16) */ per_cpu(cpu_data, cpu).it_value = next_tick;
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