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Diffstat (limited to 'arch/powerpc/kernel/time.c')
-rw-r--r--arch/powerpc/kernel/time.c20
1 files changed, 15 insertions, 5 deletions
diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index 09d31dbf43f9..f33acfd872ad 100644
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -229,6 +229,9 @@ static u64 scan_dispatch_log(u64 stop_tb)
u64 stolen = 0;
u64 dtb;
+ if (!dtl)
+ return 0;
+
if (i == vpa->dtl_idx)
return 0;
while (i < vpa->dtl_idx) {
@@ -356,7 +359,7 @@ void account_system_vtime(struct task_struct *tsk)
}
get_paca()->user_time_scaled += user_scaled;
- if (in_irq() || idle_task(smp_processor_id()) != tsk) {
+ if (in_interrupt() || idle_task(smp_processor_id()) != tsk) {
account_system_time(tsk, 0, delta, sys_scaled);
if (stolen)
account_steal_time(stolen);
@@ -577,14 +580,21 @@ void timer_interrupt(struct pt_regs * regs)
struct clock_event_device *evt = &decrementer->event;
u64 now;
+ /* Ensure a positive value is written to the decrementer, or else
+ * some CPUs will continue to take decrementer exceptions.
+ */
+ set_dec(DECREMENTER_MAX);
+
+ /* Some implementations of hotplug will get timer interrupts while
+ * offline, just ignore these
+ */
+ if (!cpu_online(smp_processor_id()))
+ return;
+
trace_timer_interrupt_entry(regs);
__get_cpu_var(irq_stat).timer_irqs++;
- /* Ensure a positive value is written to the decrementer, or else
- * some CPUs will continuue to take decrementer exceptions */
- set_dec(DECREMENTER_MAX);
-
#if defined(CONFIG_PPC32) && defined(CONFIG_PMAC)
if (atomic_read(&ppc_n_lost_interrupts) != 0)
do_IRQ(regs);