Hello.
On 01/11/2012 11:44 PM, John Crispin wrote:
The patch makes the oprofile code use the performance counters irq.
This patch is written by Felix Fietkau.
Signed-off-by: Felix Fietkau<nbd@xxxxxxxxxxx>
Signed-off-by: John Crispin<blogic@xxxxxxxxxxx>
@@ -374,6 +379,10 @@ static int __init mipsxx_init(void)
save_perf_irq = perf_irq;
perf_irq = mipsxx_perfcount_handler;
+ if (cp0_perfcount_irq>= 0)
BTW, I just noticed. IRQ0 is not a valid IRQ in Linux, request_irq() should
fail when passed 0, so this and following check should be '> 0'.
+ return request_irq(cp0_perfcount_irq, mipsxx_perfcount_int,
+ IRQF_SHARED, "Perfcounter", save_perf_irq);
+
return 0;
}
@@ -381,6 +390,9 @@ static void mipsxx_exit(void)
{
int counters = op_model_mipsxx_ops.num_counters;
+ if (cp0_perfcount_irq>= 0)
+ free_irq(cp0_perfcount_irq, save_perf_irq);
+
counters = counters_per_cpu_to_total(counters);
on_each_cpu(reset_counters, (void *)(long)counters, 1);
WBR, Sergei
