[CPUFREQ] Convert drivers/cpufreq semaphores to mutexes.

Semaphore to mutex conversion.

The conversion was generated via scripts, and the result was validated
automatically via a script as well.

Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Dave Jones <davej@redhat.com>

1 files changed, 13 insertions, 12 deletions

diff --git a/drivers/cpufreq/cpufreq_userspace.c b/drivers/cpufreq/cpufreq_userspace.c
index d32bf3593cd3..4d6fa63da598 100644
--- a/drivers/cpufreq/cpufreq_userspace.c
+++ b/drivers/cpufreq/cpufreq_userspace.c
@@ -21,6 +21,7 @@
 #include <linux/types.h>
 #include <linux/fs.h>
 #include <linux/sysfs.h>
+#include <linux/mutex.h>
 
 #include <asm/uaccess.h>
 
@@ -35,7 +36,7 @@ static unsigned int	cpu_set_freq[NR_CPUS]; /* CPU freq desired by userspace */
 static unsigned int     cpu_is_managed[NR_CPUS];
 static struct cpufreq_policy current_policy[NR_CPUS];
 
-static DECLARE_MUTEX    (userspace_sem); 
+static DEFINE_MUTEX     (userspace_mutex);
 
 #define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_GOVERNOR, "userspace", msg)
 
@@ -70,7 +71,7 @@ static int cpufreq_set(unsigned int freq, unsigned int cpu)
 
         dprintk("cpufreq_set for cpu %u, freq %u kHz\n", cpu, freq);
 
-        down(&userspace_sem);
+        mutex_lock(&userspace_mutex);
         if (!cpu_is_managed[cpu])
                 goto err;
 
@@ -83,16 +84,16 @@ static int cpufreq_set(unsigned int freq, unsigned int cpu)
 
         /*
          * We're safe from concurrent calls to ->target() here
-         * as we hold the userspace_sem lock. If we were calling
+         * as we hold the userspace_mutex lock. If we were calling
          * cpufreq_driver_target, a deadlock situation might occur:
-         * A: cpufreq_set (lock userspace_sem) -> cpufreq_driver_target(lock policy->lock)
-         * B: cpufreq_set_policy(lock policy->lock) -> __cpufreq_governor -> cpufreq_governor_userspace (lock userspace_sem)
+         * A: cpufreq_set (lock userspace_mutex) -> cpufreq_driver_target(lock policy->lock)
+         * B: cpufreq_set_policy(lock policy->lock) -> __cpufreq_governor -> cpufreq_governor_userspace (lock userspace_mutex)
          */
         ret = __cpufreq_driver_target(&current_policy[cpu], freq, 
               CPUFREQ_RELATION_L);
 
  err:
-        up(&userspace_sem);
+        mutex_unlock(&userspace_mutex);
         return ret;
 }
 
@@ -134,7 +135,7 @@ static int cpufreq_governor_userspace(struct cpufreq_policy *policy,
                 if (!cpu_online(cpu))
                         return -EINVAL;
                 BUG_ON(!policy->cur);
-                down(&userspace_sem);
+                mutex_lock(&userspace_mutex);
                 cpu_is_managed[cpu] = 1;                
                 cpu_min_freq[cpu] = policy->min;
                 cpu_max_freq[cpu] = policy->max;
@@ -143,20 +144,20 @@ static int cpufreq_governor_userspace(struct cpufreq_policy *policy,
                 sysfs_create_file (&policy->kobj, &freq_attr_scaling_setspeed.attr);
                 memcpy (&current_policy[cpu], policy, sizeof(struct cpufreq_policy));
                 dprintk("managing cpu %u started (%u - %u kHz, currently %u kHz)\n", cpu, cpu_min_freq[cpu], cpu_max_freq[cpu], cpu_cur_freq[cpu]);
-                up(&userspace_sem);
+                mutex_unlock(&userspace_mutex);
                 break;
         case CPUFREQ_GOV_STOP:
-                down(&userspace_sem);
+                mutex_lock(&userspace_mutex);
                 cpu_is_managed[cpu] = 0;
                 cpu_min_freq[cpu] = 0;
                 cpu_max_freq[cpu] = 0;
                 cpu_set_freq[cpu] = 0;
                 sysfs_remove_file (&policy->kobj, &freq_attr_scaling_setspeed.attr);
                 dprintk("managing cpu %u stopped\n", cpu);
-                up(&userspace_sem);
+                mutex_unlock(&userspace_mutex);
                 break;
         case CPUFREQ_GOV_LIMITS:
-                down(&userspace_sem);
+                mutex_lock(&userspace_mutex);
                 cpu_min_freq[cpu] = policy->min;
                 cpu_max_freq[cpu] = policy->max;
                 dprintk("limit event for cpu %u: %u - %u kHz, currently %u kHz, last set to %u kHz\n", cpu, cpu_min_freq[cpu], cpu_max_freq[cpu], cpu_cur_freq[cpu], cpu_set_freq[cpu]);
@@ -171,7 +172,7 @@ static int cpufreq_governor_userspace(struct cpufreq_policy *policy,
                               CPUFREQ_RELATION_L);
                 }
                 memcpy (&current_policy[cpu], policy, sizeof(struct cpufreq_policy));
-                up(&userspace_sem);
+                mutex_unlock(&userspace_mutex);
                 break;
         }
         return 0;