[patch V2 03/12] thermal/x86_pkg_temp: Replace open coded cpu search

From: Thomas Gleixner
Date: Tue Nov 22 2016 - 13:03:01 EST


find_next_sibling() iterates over the online cpus and searches for a cpu
with the same package id as the current cpu. This is a pointless exercise
as topology_core_cpumask() allows a simple cpumask search for an online cpu
on the same package.

Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>

---
drivers/thermal/x86_pkg_temp_thermal.c | 19 ++++---------------
1 file changed, 4 insertions(+), 15 deletions(-)

--- a/drivers/thermal/x86_pkg_temp_thermal.c
+++ b/drivers/thermal/x86_pkg_temp_thermal.c
@@ -384,18 +384,6 @@ static int pkg_temp_thermal_platform_the
return 0;
}

-static int find_siblings_cpu(int cpu)
-{
- int i;
- int id = topology_physical_package_id(cpu);
-
- for_each_online_cpu(i)
- if (i != cpu && topology_physical_package_id(i) == id)
- return i;
-
- return 0;
-}
-
static int pkg_temp_thermal_device_add(unsigned int cpu)
{
int err;
@@ -488,9 +476,10 @@ static int pkg_temp_thermal_device_remov
mutex_lock(&phy_dev_list_mutex);
/* If we are loosing the first cpu for this package, we need change */
if (phdev->first_cpu == cpu) {
- phdev->first_cpu = find_siblings_cpu(cpu);
- pr_debug("thermal_device_remove: first cpu switched %d\n",
- phdev->first_cpu);
+ int target = cpumask_any_but(topology_core_cpumask(cpu), cpu);
+
+ phdev->first_cpu = target;
+ pr_debug("CPU %d down. New first_cpu%d\n", cpu, target);
}
/*
* It is possible that no siblings left as this was the last cpu