Messages in this thread Patch in this message | | | From | Andrzej Hajda <> | Subject | [PATCH 01/38] arm-cci: fix handling cpumask_any_but return value | Date | Mon, 21 Sep 2015 15:33:33 +0200 |
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cpumask_any_but returns value >= nr_cpu_ids if there are no more CPUs.
The problem has been detected using proposed semantic patch scripts/coccinelle/tests/unsigned_lesser_than_zero.cocci [1].
[1]: http://permalink.gmane.org/gmane.linux.kernel/2038576
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com> --- drivers/bus/arm-cci.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/bus/arm-cci.c b/drivers/bus/arm-cci.c index 577cc4b..22754d0 100644 --- a/drivers/bus/arm-cci.c +++ b/drivers/bus/arm-cci.c @@ -1314,7 +1314,7 @@ static int cci_pmu_cpu_notifier(struct notifier_block *self, if (!cpumask_test_and_clear_cpu(cpu, &cci_pmu->cpus)) break; target = cpumask_any_but(cpu_online_mask, cpu); - if (target < 0) // UP, last CPU + if (target >= nr_cpu_ids) // UP, last CPU break; /* * TODO: migrate context once core races on event->ctx have -- 1.9.1
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