hwmon: (lm70) Convert semaphore to mutex
Matthias Kaehlcke [Wed, 24 Oct 2007 12:59:09 +0000 (14:59 +0200)]
Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com>
Acked-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>

drivers/hwmon/lm70.c

index dd36688..d435f00 100644 (file)
 #include <linux/err.h>
 #include <linux/sysfs.h>
 #include <linux/hwmon.h>
+#include <linux/mutex.h>
 #include <linux/spi/spi.h>
-#include <asm/semaphore.h>
+
 
 #define DRVNAME                "lm70"
 
 struct lm70 {
        struct device *hwmon_dev;
-       struct semaphore sem;
+       struct mutex lock;
 };
 
 /* sysfs hook function */
@@ -51,7 +52,7 @@ static ssize_t lm70_sense_temp(struct device *dev,
        s16 raw=0;
        struct lm70 *p_lm70 = dev_get_drvdata(&spi->dev);
 
-       if (down_interruptible(&p_lm70->sem))
+       if (mutex_lock_interruptible(&p_lm70->lock))
                return -ERESTARTSYS;
 
        /*
@@ -83,7 +84,7 @@ static ssize_t lm70_sense_temp(struct device *dev,
        val = ((int)raw/32) * 250;
        status = sprintf(buf, "%d\n", val); /* millidegrees Celsius */
 out:
-       up(&p_lm70->sem);
+       mutex_unlock(&p_lm70->lock);
        return status;
 }
 
@@ -112,7 +113,7 @@ static int __devinit lm70_probe(struct spi_device *spi)
        if (!p_lm70)
                return -ENOMEM;
 
-       init_MUTEX(&p_lm70->sem);
+       mutex_init(&p_lm70->lock);
 
        /* sysfs hook */
        p_lm70->hwmon_dev = hwmon_device_register(&spi->dev);