4.9-stable review patch. If anyone has any objections, please let me know.
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From: Lenny Szubowicz lszubowi@redhat.com
[ Upstream commit 8b29d29abc484d638213dd79a18a95ae7e5bb402 ]
Fix once per second (round_robin_time) memory leak of about 1 KB in each acpi_pad kernel idling thread that is activated.
Found by testing with kmemleak.
Signed-off-by: Lenny Szubowicz lszubowi@redhat.com Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/acpi/acpi_pad.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/drivers/acpi/acpi_pad.c +++ b/drivers/acpi/acpi_pad.c @@ -109,6 +109,7 @@ static void round_robin_cpu(unsigned int cpumask_andnot(tmp, cpu_online_mask, pad_busy_cpus); if (cpumask_empty(tmp)) { mutex_unlock(&round_robin_lock); + free_cpumask_var(tmp); return; } for_each_cpu(cpu, tmp) { @@ -126,6 +127,8 @@ static void round_robin_cpu(unsigned int mutex_unlock(&round_robin_lock);
set_cpus_allowed_ptr(current, cpumask_of(preferred_cpu)); + + free_cpumask_var(tmp); }
static void exit_round_robin(unsigned int tsk_index)