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parisc: Fix detection of nonsynchronous cr16 cycle counters

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For CPUs which have an unknown or invalid CPU location (physical location)
assume that their cycle counters aren't syncronized across CPUs.

Signed-off-by: Helge Deller <deller@gmx.de>
Fixes: c8c3735997 ("parisc: Enhance detection of synchronous cr16 clocksources")
Cc: stable@vger.kernel.org # 4.13+
Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Helge Deller 2017-10-18 22:25:00 +02:00
parent 2aae008ca6
commit 8642b31ba9
1 changed files with 4 additions and 1 deletions
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5
arch/parisc/kernel/time.c
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@ -253,7 +253,10 @@ static int __init init_cr16_clocksource(void)
cpu0_loc = per_cpu(cpu_data, 0).cpu_loc;
for_each_online_cpu(cpu) {
if (cpu0_loc == per_cpu(cpu_data, cpu).cpu_loc)
if (cpu == 0)
continue;
if ((cpu0_loc != 0) &&
(cpu0_loc == per_cpu(cpu_data, cpu).cpu_loc))
continue;
clocksource_cr16.name = "cr16_unstable";