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c45361abb9
When CONFIG_SMP=y, timebase synchronization is required when the second
kernel is started.
arch/powerpc/kernel/smp.c:
int __cpu_up(unsigned int cpu, struct task_struct *tidle)
{
...
if (smp_ops->give_timebase)
smp_ops->give_timebase();
...
}
void start_secondary(void *unused)
{
...
if (smp_ops->take_timebase)
smp_ops->take_timebase();
...
}
When CONFIG_HOTPLUG_CPU=n and CONFIG_KEXEC_CORE=n,
smp_85xx_ops.give_timebase is NULL,
smp_85xx_ops.take_timebase is NULL,
As a result, the timebase is not synchronized.
Timebase synchronization does not depend on CONFIG_HOTPLUG_CPU.
Fixes:
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.. | ||
4xx | ||
8xx | ||
40x | ||
44x | ||
52xx | ||
82xx | ||
83xx | ||
85xx | ||
86xx | ||
512x | ||
amigaone | ||
book3s | ||
cell | ||
chrp | ||
embedded6xx | ||
maple | ||
microwatt | ||
pasemi | ||
powermac | ||
powernv | ||
ps3 | ||
pseries | ||
fsl_uli1575.c | ||
Kconfig | ||
Kconfig.cputype | ||
Makefile |