thermal/x86_pkg_temp: Move work scheduled flag into package struct

Storage for a boolean information whether work is scheduled for a package
is kept in separate allocated storage, which is resized when the number of
detected packages grows.

With the proper locking in place this is a completely pointless exercise
because we can simply stick it into the per package struct.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>

diff --git a/drivers/thermal/x86_pkg_temp_thermal.c b/drivers/thermal/x86_pkg_temp_thermal.c
index 2c8b7e7..91f267a 100644 (file)
--- a/drivers/thermal/x86_pkg_temp_thermal.c
+++ b/drivers/thermal/x86_pkg_temp_thermal.c
@@ -61,6 +61,7 @@ struct pkg_device {
        struct list_head                list;
        u16                             phys_proc_id;
        u16                             cpu;
+       bool                            work_scheduled;
        u32                             tj_max;
        u32                             msr_pkg_therm_low;
        u32                             msr_pkg_therm_high;
@@ -82,11 +83,6 @@ static DEFINE_MUTEX(thermal_zone_mutex);
 /* Interrupt to work function schedule queue */
 static DEFINE_PER_CPU(struct delayed_work, pkg_temp_thermal_threshold_work);
 
-/* To track if the work is already scheduled on a package */
-static u8 *pkg_work_scheduled;
-
-static u16 max_phy_id;
-
 /* Debug counters to show using debugfs */
 static struct dentry *debugfs;
 static unsigned int pkg_interrupt_cnt;
@@ -294,7 +290,7 @@ static inline void disable_pkg_thres_interrupt(void)
 static void pkg_temp_thermal_threshold_work_fn(struct work_struct *work)
 {
        struct thermal_zone_device *tzone = NULL;
-       int phy_id, cpu = smp_processor_id();
+       int cpu = smp_processor_id();
        struct pkg_device *pkgdev;
        u64 msr_val, wr_val;
 
@@ -308,8 +304,7 @@ static void pkg_temp_thermal_threshold_work_fn(struct work_struct *work)
                mutex_unlock(&thermal_zone_mutex);
                return;
        }
-
-       pkg_work_scheduled[phy_id] = 0;
+       pkgdev->work_scheduled = false;
 
        rdmsrl(MSR_IA32_PACKAGE_THERM_STATUS, msr_val);
        wr_val = msr_val & ~(THERM_LOG_THRESHOLD0 | THERM_LOG_THRESHOLD1);
@@ -334,7 +329,6 @@ static void pkg_temp_thermal_threshold_work_fn(struct work_struct *work)
 static int pkg_thermal_notify(u64 msr_val)
 {
        int cpu = smp_processor_id();
-       int phy_id = topology_physical_package_id(cpu);
        struct pkg_device *pkgdev;
        unsigned long flags;
 
@@ -345,8 +339,8 @@ static int pkg_thermal_notify(u64 msr_val)
 
        /* Work is per package, so scheduling it once is enough. */
        pkgdev = pkg_temp_thermal_get_dev(cpu);
-       if (pkgdev && pkg_work_scheduled && !pkg_work_scheduled[phy_id]) {
-               pkg_work_scheduled[phy_id] = 1;
+       if (pkgdev && !pkgdev->work_scheduled) {
+               pkgdev->work_scheduled = true;
                schedule_delayed_work_on(cpu,
                                &per_cpu(pkg_temp_thermal_threshold_work, cpu),
                                msecs_to_jiffies(notify_delay_ms));
@@ -361,8 +355,6 @@ static int pkg_temp_thermal_device_add(unsigned int cpu)
        u32 tj_max, eax, ebx, ecx, edx;
        struct pkg_device *pkgdev;
        int thres_count, err;
-       unsigned long flags;
-       u8 *temp;
 
        cpuid(6, &eax, &ebx, &ecx, &edx);
        thres_count = ebx & 0x07;
@@ -382,20 +374,6 @@ static int pkg_temp_thermal_device_add(unsigned int cpu)
        if (!pkgdev)
                return -ENOMEM;
 
-       spin_lock_irqsave(&pkg_temp_lock, flags);
-       if (topology_physical_package_id(cpu) > max_phy_id)
-               max_phy_id = topology_physical_package_id(cpu);
-       temp = krealloc(pkg_work_scheduled,
-                       (max_phy_id+1) * sizeof(u8), GFP_ATOMIC);
-       if (!temp) {
-               spin_unlock_irqrestore(&pkg_temp_lock, flags);
-               kfree(pkgdev);
-               return -ENOMEM;
-       }
-       pkg_work_scheduled = temp;
-       pkg_work_scheduled[topology_physical_package_id(cpu)] = 0;
-       spin_unlock_irqrestore(&pkg_temp_lock, flags);
-
        pkgdev->phys_proc_id = topology_physical_package_id(cpu);
        pkgdev->cpu = cpu;
        pkgdev->tj_max = tj_max;
@@ -554,7 +532,6 @@ err_ret:
        for_each_online_cpu(i)
                put_core_offline(i);
        cpu_notifier_register_done();
-       kfree(pkg_work_scheduled);
        return -ENODEV;
 }
 module_init(pkg_temp_thermal_init)
@@ -572,8 +549,6 @@ static void __exit pkg_temp_thermal_exit(void)
                put_core_offline(i);
        cpu_notifier_register_done();
 
-       kfree(pkg_work_scheduled);
-
        debugfs_remove_recursive(debugfs);
 }
 module_exit(pkg_temp_thermal_exit)