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powerpc: Fix SMP time initialization problem 

We were getting the last_jiffy per-cpu variable set ahead of the current
timebase in smp_space_timers on SMP machines.  This caused the loop in
timer_interrupt to loop virtually forever, since tb_ticks_since assumes
that it will never be called with the timebase behind the last_jiffy
value.

Signed-off-by: Paul Mackerras <paulus@samba.org>
hifive-unleashed-5.1
Paul Mackerras 2005-11-10 14:28:03 +11:00
parent 094fe2e712
commit cbe62e2b4a
1 changed files with 2 additions and 0 deletions
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arch/powerpc/kernel/time.c
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@ -484,6 +484,8 @@ void __init smp_space_timers(unsigned int max_cpus)
unsigned long offset = tb_ticks_per_jiffy / max_cpus;
unsigned long previous_tb = per_cpu(last_jiffy, boot_cpuid);
/* make sure tb > per_cpu(last_jiffy, cpu) for all cpus always */
previous_tb -= tb_ticks_per_jiffy;
for_each_cpu(i) {
if (i != boot_cpuid) {
previous_tb += offset;