4 files changed, 29 insertions, 20 deletions

diff --git a/drivers/w1/w1.c b/drivers/w1/w1.c
index b2fe0f7..39888af 100644
--- a/drivers/w1/w1.c
+++ b/drivers/w1/w1.c
@@ -89,15 +89,13 @@ static int w1_master_remove(struct device *dev)
 
 static void w1_master_release(struct device *dev)
 {
-	struct w1_master *md = container_of(dev, struct w1_master, dev);
-
+	struct w1_master *md = dev_to_w1_master(dev);
 	complete(&md->dev_released);
 }
 
 static void w1_slave_release(struct device *dev)
 {
-	struct w1_slave *sl = container_of(dev, struct w1_slave, dev);
-
+	struct w1_slave *sl = dev_to_w1_slave(dev);
 	complete(&sl->dev_released);
 }
 
@@ -162,7 +160,7 @@ struct device w1_slave_device = {
 
 static ssize_t w1_master_attribute_show_name(struct device *dev, struct device_attribute *attr, char *buf)
 {
-	struct w1_master *md = container_of(dev, struct w1_master, dev);
+	struct w1_master *md = dev_to_w1_master(dev);
 	ssize_t count;
 
 	if (down_interruptible (&md->mutex))
@@ -179,7 +177,7 @@ static ssize_t w1_master_attribute_store_search(struct device * dev,
 						struct device_attribute *attr,
 						const char * buf, size_t count)
 {
-	struct w1_master *md = container_of(dev, struct w1_master, dev);
+	struct w1_master *md = dev_to_w1_master(dev);
 
 	if (down_interruptible (&md->mutex))
 		return -EBUSY;
@@ -195,7 +193,7 @@ static ssize_t w1_master_attribute_show_search(struct device *dev,
 					       struct device_attribute *attr,
 					       char *buf)
 {
-	struct w1_master *md = container_of(dev, struct w1_master, dev);
+	struct w1_master *md = dev_to_w1_master(dev);
 	ssize_t count;
 
 	if (down_interruptible (&md->mutex))
@@ -210,7 +208,7 @@ static ssize_t w1_master_attribute_show_search(struct device *dev,
 
 static ssize_t w1_master_attribute_show_pointer(struct device *dev, struct device_attribute *attr, char *buf)
 {
-	struct w1_master *md = container_of(dev, struct w1_master, dev);
+	struct w1_master *md = dev_to_w1_master(dev);
 	ssize_t count;
 
 	if (down_interruptible(&md->mutex))
@@ -231,7 +229,7 @@ static ssize_t w1_master_attribute_show_timeout(struct device *dev, struct devic
 
 static ssize_t w1_master_attribute_show_max_slave_count(struct device *dev, struct device_attribute *attr, char *buf)
 {
-	struct w1_master *md = container_of(dev, struct w1_master, dev);
+	struct w1_master *md = dev_to_w1_master(dev);
 	ssize_t count;
 
 	if (down_interruptible(&md->mutex))
@@ -245,7 +243,7 @@ static ssize_t w1_master_attribute_show_max_slave_count(struct device *dev, stru
 
 static ssize_t w1_master_attribute_show_attempts(struct device *dev, struct device_attribute *attr, char *buf)
 {
-	struct w1_master *md = container_of(dev, struct w1_master, dev);
+	struct w1_master *md = dev_to_w1_master(dev);
 	ssize_t count;
 
 	if (down_interruptible(&md->mutex))
@@ -259,7 +257,7 @@ static ssize_t w1_master_attribute_show_attempts(struct device *dev, struct devi
 
 static ssize_t w1_master_attribute_show_slave_count(struct device *dev, struct device_attribute *attr, char *buf)
 {
-	struct w1_master *md = container_of(dev, struct w1_master, dev);
+	struct w1_master *md = dev_to_w1_master(dev);
 	ssize_t count;
 
 	if (down_interruptible(&md->mutex))
@@ -273,7 +271,7 @@ static ssize_t w1_master_attribute_show_slave_count(struct device *dev, struct d
 
 static ssize_t w1_master_attribute_show_slaves(struct device *dev, struct device_attribute *attr, char *buf)
 {
-	struct w1_master *md = container_of(dev, struct w1_master, dev);
+	struct w1_master *md = dev_to_w1_master(dev);
 	int c = PAGE_SIZE;
 
 	if (down_interruptible(&md->mutex))
diff --git a/drivers/w1/w1.h b/drivers/w1/w1.h
index 4f0a986..f830826 100644
--- a/drivers/w1/w1.h
+++ b/drivers/w1/w1.h
@@ -191,6 +191,21 @@ struct w1_master
 int w1_create_master_attributes(struct w1_master *);
 void w1_search(struct w1_master *dev, w1_slave_found_callback cb);
 
+static inline struct w1_slave* dev_to_w1_slave(struct device *dev)
+{
+	return container_of(dev, struct w1_slave, dev);
+}
+
+static inline struct w1_slave* kobj_to_w1_slave(struct kobject *kobj)
+{
+	return dev_to_w1_slave(container_of(kobj, struct device, kobj));
+}
+
+static inline struct w1_master* dev_to_w1_master(struct device *dev)
+{
+	return container_of(dev, struct w1_master, dev);
+}
+
 #endif /* __KERNEL__ */
 
 #endif /* __W1_H */
diff --git a/drivers/w1/w1_smem.c b/drivers/w1/w1_smem.c
index 70d2d46..2b6580c 100644
--- a/drivers/w1/w1_smem.c
+++ b/drivers/w1/w1_smem.c
@@ -46,15 +46,13 @@ static struct w1_family_ops w1_smem_fops = {
 
 static ssize_t w1_smem_read_name(struct device *dev, struct device_attribute *attr, char *buf)
 {
-	struct w1_slave *sl = container_of(dev, struct w1_slave, dev);
-
+	struct w1_slave *sl = dev_to_w1_slave(dev);
 	return sprintf(buf, "%s\n", sl->name);
 }
 
 static ssize_t w1_smem_read_bin(struct kobject *kobj, char *buf, loff_t off, size_t count)
 {
-	struct w1_slave *sl = container_of(container_of(kobj, struct device, kobj),
-					   struct w1_slave, dev);
+	struct w1_slave *sl = kobj_to_w1_slave(kobj);
 	int i;
 
 	atomic_inc(&sl->refcnt);
diff --git a/drivers/w1/w1_therm.c b/drivers/w1/w1_therm.c
index 165526c..2259f3d 100644
--- a/drivers/w1/w1_therm.c
+++ b/drivers/w1/w1_therm.c
@@ -92,8 +92,7 @@ static struct w1_therm_family_converter w1_therm_families[] = {
 
 static ssize_t w1_therm_read_name(struct device *dev, struct device_attribute *attr, char *buf)
 {
-	struct w1_slave *sl = container_of(dev, struct w1_slave, dev);
-
+	struct w1_slave *sl = dev_to_w1_slave(dev);
 	return sprintf(buf, "%s\n", sl->name);
 }
 
@@ -148,8 +147,7 @@ static int w1_therm_check_rom(u8 rom[9])
 
 static ssize_t w1_therm_read_bin(struct kobject *kobj, char *buf, loff_t off, size_t count)
 {
-	struct w1_slave *sl = container_of(container_of(kobj, struct device, kobj),
-					   struct w1_slave, dev);
+	struct w1_slave *sl = kobj_to_w1_slave(kobj);
 	struct w1_master *dev = sl->master;
 	u8 rom[9], crc, verdict;
 	int i, max_trying = 10;