1 files changed, 13 insertions, 22 deletions

diff --git a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
index 6f11e029e8c5..4b1c319d30c3 100644
--- a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
+++ b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
@@ -145,13 +145,14 @@ typedef union {
 
 struct drv_cmd {
         unsigned int type;
-        cpumask_var_t mask;
+        const struct cpumask *mask;
         drv_addr_union addr;
         u32 val;
 };
 
-static void do_drv_read(struct drv_cmd *cmd)
+static long do_drv_read(void *_cmd)
 {
+        struct drv_cmd *cmd = _cmd;
         u32 h;
 
         switch (cmd->type) {
@@ -166,10 +167,12 @@ static void do_drv_read(struct drv_cmd *cmd)
         default:
                 break;
         }
+        return 0;
 }
 
-static void do_drv_write(struct drv_cmd *cmd)
+static long do_drv_write(void *_cmd)
 {
+        struct drv_cmd *cmd = _cmd;
         u32 lo, hi;
 
         switch (cmd->type) {
@@ -186,30 +189,23 @@ static void do_drv_write(struct drv_cmd *cmd)
         default:
                 break;
         }
+        return 0;
 }
 
 static void drv_read(struct drv_cmd *cmd)
 {
-        cpumask_t saved_mask = current->cpus_allowed;
         cmd->val = 0;
 
-        set_cpus_allowed_ptr(current, cmd->mask);
-        do_drv_read(cmd);
-        set_cpus_allowed_ptr(current, &saved_mask);
+        work_on_cpu(cpumask_any(cmd->mask), do_drv_read, cmd);
 }
 
 static void drv_write(struct drv_cmd *cmd)
 {
-        cpumask_t saved_mask = current->cpus_allowed;
         unsigned int i;
 
         for_each_cpu(i, cmd->mask) {
-                set_cpus_allowed_ptr(current, cpumask_of(i));
-                do_drv_write(cmd);
+                work_on_cpu(i, do_drv_write, cmd);
         }
-
-        set_cpus_allowed_ptr(current, &saved_mask);
-        return;
 }
 
 static u32 get_cur_val(const struct cpumask *mask)
@@ -235,8 +231,7 @@ static u32 get_cur_val(const struct cpumask *mask)
                 return 0;
         }
 
-        cpumask_copy(cmd.mask, mask);
-
+        cmd.mask = mask;
         drv_read(&cmd);
 
         dprintk("get_cur_val = %u\n", cmd.val);
@@ -368,7 +363,7 @@ static unsigned int get_cur_freq_on_cpu(unsigned int cpu)
         return freq;
 }
 
-static unsigned int check_freqs(const cpumask_t *mask, unsigned int freq,
+static unsigned int check_freqs(const struct cpumask *mask, unsigned int freq,
                                 struct acpi_cpufreq_data *data)
 {
         unsigned int cur_freq;
@@ -403,9 +398,6 @@ static int acpi_cpufreq_target(struct cpufreq_policy *policy,
                 return -ENODEV;
         }
 
-        if (unlikely(!alloc_cpumask_var(&cmd.mask, GFP_KERNEL)))
-                return -ENOMEM;
-
         perf = data->acpi_data;
         result = cpufreq_frequency_table_target(policy,
                                                 data->freq_table,
@@ -450,9 +442,9 @@ static int acpi_cpufreq_target(struct cpufreq_policy *policy,
 
         /* cpufreq holds the hotplug lock, so we are safe from here on */
         if (policy->shared_type != CPUFREQ_SHARED_TYPE_ANY)
-                cpumask_and(cmd.mask, cpu_online_mask, policy->cpus);
+                cmd.mask = policy->cpus;
         else
-                cpumask_copy(cmd.mask, cpumask_of(policy->cpu));
+                cmd.mask = cpumask_of(policy->cpu);
 
         freqs.old = perf->states[perf->state].core_frequency * 1000;
         freqs.new = data->freq_table[next_state].frequency;
@@ -479,7 +471,6 @@ static int acpi_cpufreq_target(struct cpufreq_policy *policy,
         perf->state = next_perf_state;
 
 out:
-        free_cpumask_var(cmd.mask);
         return result;
 }