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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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.. | ||
boot | ||
configs | ||
crypto | ||
include | ||
kernel | ||
kexec | ||
kvm | ||
lib | ||
math-emu | ||
mm | ||
net | ||
perf | ||
platforms | ||
purgatory | ||
sysdev | ||
tools | ||
xmon | ||
Kbuild | ||
Kconfig | ||
Kconfig.debug | ||
Makefile | ||
Makefile.postlink |