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s390/smp: Use monotonic clock in smp_emergency_stop()

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This is a cosmetic change because when in smp_emergency_stop()
the system is going to die anyway. But still change the code
to use get_tod_clock_monotonic() to prevent people from copying
broken code.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
This commit is contained in:
Sven Schnelle
2025-07-21 12:41:55 +02:00
committed by Alexander Gordeev
parent 09e7e29d2b
commit e12570c985
1 changed files with 3 additions and 3 deletions
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arch/s390/kernel/smp.c
+3 -3
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@@ -430,16 +430,16 @@ void notrace smp_emergency_stop(void)
cpumask_copy(&cpumask, cpu_online_mask);
cpumask_clear_cpu(smp_processor_id(), &cpumask);
end = get_tod_clock() + (1000000UL << 12);
end = get_tod_clock_monotonic() + (1000000UL << 12);
for_each_cpu(cpu, &cpumask) {
struct pcpu *pcpu = per_cpu_ptr(&pcpu_devices, cpu);
set_bit(ec_stop_cpu, &pcpu->ec_mask);
while (__pcpu_sigp(pcpu->address, SIGP_EMERGENCY_SIGNAL,
0, NULL) == SIGP_CC_BUSY &&
get_tod_clock() < end)
get_tod_clock_monotonic() < end)
cpu_relax();
}
while (get_tod_clock() < end) {
while (get_tod_clock_monotonic() < end) {
for_each_cpu(cpu, &cpumask)
if (pcpu_stopped(per_cpu_ptr(&pcpu_devices, cpu)))
cpumask_clear_cpu(cpu, &cpumask);