1 files changed, 13 insertions, 36 deletions

diff --git a/drivers/w1/w1_int.c b/drivers/w1/w1_int.c
index c3f67eafc7e..68565aacec7 100644
--- a/drivers/w1/w1_int.c
+++ b/drivers/w1/w1_int.c
@@ -22,23 +22,15 @@
 #include <linux/kernel.h>
 #include <linux/list.h>
 #include <linux/delay.h>
+#include <linux/kthread.h>
 
 #include "w1.h"
 #include "w1_log.h"
 #include "w1_netlink.h"
+#include "w1_int.h"
 
 static u32 w1_ids = 1;
 
-extern struct device_driver w1_master_driver;
-extern struct bus_type w1_bus_type;
-extern struct device w1_master_device;
-extern int w1_max_slave_count;
-extern int w1_max_slave_ttl;
-extern struct list_head w1_masters;
-extern spinlock_t w1_mlock;
-
-extern int w1_process(void *);
-
 static struct w1_master * w1_alloc_dev(u32 id, int slave_count, int slave_ttl,
 				       struct device_driver *driver,
 				       struct device *device)
@@ -65,7 +57,6 @@ static struct w1_master * w1_alloc_dev(u32 id, int slave_count, int slave_ttl,
 	dev->max_slave_count	= slave_count;
 	dev->slave_count	= 0;
 	dev->attempts		= 0;
-	dev->kpid		= -1;
 	dev->initialized	= 0;
 	dev->id			= id;
 	dev->slave_ttl		= slave_ttl;
@@ -76,8 +67,6 @@ static struct w1_master * w1_alloc_dev(u32 id, int slave_count, int slave_ttl,
 	INIT_LIST_HEAD(&dev->slist);
 	init_MUTEX(&dev->mutex);
 
-	init_completion(&dev->dev_exited);
-
 	memcpy(&dev->dev, device, sizeof(struct device));
 	snprintf(dev->dev.bus_id, sizeof(dev->dev.bus_id),
 		  "w1_bus_master%u", dev->id);
@@ -103,7 +92,7 @@ static struct w1_master * w1_alloc_dev(u32 id, int slave_count, int slave_ttl,
 	return dev;
 }
 
-void w1_free_dev(struct w1_master *dev)
+static void w1_free_dev(struct w1_master *dev)
 {
 	device_unregister(&dev->dev);
 }
@@ -125,12 +114,12 @@ int w1_add_master_device(struct w1_bus_master *master)
 	if (!dev)
 		return -ENOMEM;
 
-	dev->kpid = kernel_thread(&w1_process, dev, 0);
-	if (dev->kpid < 0) {
+	dev->thread = kthread_run(&w1_process, dev, "%s", dev->name);
+	if (IS_ERR(dev->thread)) {
+		retval = PTR_ERR(dev->thread);
 		dev_err(&dev->dev,
 			 "Failed to create new kernel thread. err=%d\n",
-			 dev->kpid);
-		retval = dev->kpid;
+			 retval);
 		goto err_out_free_dev;
 	}
 
@@ -147,20 +136,14 @@ int w1_add_master_device(struct w1_bus_master *master)
 	spin_unlock(&w1_mlock);
 
 	msg.id.mst.id = dev->id;
-	msg.id.mst.pid = dev->kpid;
+	msg.id.mst.pid = dev->thread->pid;
 	msg.type = W1_MASTER_ADD;
 	w1_netlink_send(dev, &msg);
 
 	return 0;
 
 err_out_kill_thread:
-	set_bit(W1_MASTER_NEED_EXIT, &dev->flags);
-	if (kill_proc(dev->kpid, SIGTERM, 1))
-		dev_err(&dev->dev,
-			 "Failed to send signal to w1 kernel thread %d.\n",
-			 dev->kpid);
-	wait_for_completion(&dev->dev_exited);
-
+	kthread_stop(dev->thread);
 err_out_free_dev:
 	w1_free_dev(dev);
 
@@ -169,18 +152,14 @@ err_out_free_dev:
 
 void __w1_remove_master_device(struct w1_master *dev)
 {
-	int err;
 	struct w1_netlink_msg msg;
+	pid_t pid = dev->thread->pid;
 
 	set_bit(W1_MASTER_NEED_EXIT, &dev->flags);
-	err = kill_proc(dev->kpid, SIGTERM, 1);
-	if (err)
-		dev_err(&dev->dev,
-			 "%s: Failed to send signal to w1 kernel thread %d.\n",
-			 __func__, dev->kpid);
+	kthread_stop(dev->thread);
 
 	while (atomic_read(&dev->refcnt)) {
-		dev_dbg(&dev->dev, "Waiting for %s to become free: refcnt=%d.\n",
+		dev_info(&dev->dev, "Waiting for %s to become free: refcnt=%d.\n",
 				dev->name, atomic_read(&dev->refcnt));
 
 		if (msleep_interruptible(1000))
@@ -188,7 +167,7 @@ void __w1_remove_master_device(struct w1_master *dev)
 	}
 
 	msg.id.mst.id = dev->id;
-	msg.id.mst.pid = dev->kpid;
+	msg.id.mst.pid = pid;
 	msg.type = W1_MASTER_REMOVE;
 	w1_netlink_send(dev, &msg);
 
@@ -217,5 +196,3 @@ void w1_remove_master_device(struct w1_bus_master *bm)
 
 EXPORT_SYMBOL(w1_add_master_device);
 EXPORT_SYMBOL(w1_remove_master_device);
-
-MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_W1);