Commit cbe62e2b authored Nov 10, 2005 by Paul Mackerras

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>

parent 094fe2e7

arch/powerpc/kernel/time.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -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;