Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1527812 > unrolled thread

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

Back to article view | Back to linux.kernel

This discussion starts older than the indexed window; earlier articles aren't shown. The article labeled Started by below is the oldest one visible, not the original post.

Contents

  [patch V2 03/12] thermal/x86_pkg_temp: Replace open coded cpu search Thomas Gleixner <tglx@linutronix.de> - 2016-11-22 19:10 +0100

#1527812 — [patch V2 03/12] thermal/x86_pkg_temp: Replace open coded cpu search

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@linutronix.de>

---
 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

[toc] | [standalone]

Back to top | Article view | linux.kernel

csiph-web