Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6

drivers/sbus/char/bbc_envctrl.c

@@ -7,6 +7,7 @@
 #define __KERNEL_SYSCALLS__
 
 #include <linux/kernel.h>
+#include <linux/kthread.h>
 #include <linux/sched.h>
 #include <linux/slab.h>
 #include <linux/delay.h>
@@ -459,18 +460,14 @@ static struct task_struct *kenvctrld_task;
 
 static int kenvctrld(void *__unused)
 {
-	daemonize("kenvctrld");
-	allow_signal(SIGKILL);
-	kenvctrld_task = current;
-
 	printk(KERN_INFO "bbc_envctrl: kenvctrld starting...\n");
 	last_warning_jiffies = jiffies - WARN_INTERVAL;
 	for (;;) {
 		struct bbc_cpu_temperature *tp;
 		struct bbc_fan_control *fp;
 
 		msleep_interruptible(POLL_INTERVAL);
-		if (signal_pending(current))
+		if (kthread_should_stop())
 			break;
 
 		for (tp = all_bbc_temps; tp; tp = tp->next) {
@@ -577,17 +574,20 @@ int bbc_envctrl_init(void)
 	int temp_index = 0;
 	int fan_index = 0;
 	int devidx = 0;
-	int err = 0;
 
 	while ((echild = bbc_i2c_getdev(devidx++)) != NULL) {
 		if (!strcmp(echild->prom_name, "temperature"))
 			attach_one_temp(echild, temp_index++);
 		if (!strcmp(echild->prom_name, "fan-control"))
 			attach_one_fan(echild, fan_index++);
 	}
-	if (temp_index != 0 && fan_index != 0)
-		err = kernel_thread(kenvctrld, NULL, CLONE_FS | CLONE_FILES);
-	return err;
+	if (temp_index != 0 && fan_index != 0) {
+		kenvctrld_task = kthread_run(kenvctrld, NULL, "kenvctrld");
+		if (IS_ERR(kenvctrld_task))
+			return PTR_ERR(kenvctrld_task);
+	}
+
+	return 0;
 }
 
 static void destroy_one_temp(struct bbc_cpu_temperature *tp)
@@ -607,26 +607,7 @@ void bbc_envctrl_cleanup(void)
 	struct bbc_cpu_temperature *tp;
 	struct bbc_fan_control *fp;
 
-	if (kenvctrld_task != NULL) {
-		force_sig(SIGKILL, kenvctrld_task);
-		for (;;) {
-			struct task_struct *p;
-			int found = 0;
-
-			read_lock(&tasklist_lock);
-			for_each_process(p) {
-				if (p == kenvctrld_task) {
-					found = 1;
-					break;
-				}
-			}
-			read_unlock(&tasklist_lock);
-			if (!found)
-				break;
-			msleep(1000);
-		}
-		kenvctrld_task = NULL;
-	}
+	kthread_stop(kenvctrld_task);
 
 	tp = all_bbc_temps;
 	while (tp != NULL) {

drivers/sbus/char/envctrl.c

@@ -24,6 +24,7 @@
 #include <linux/config.h>
 #include <linux/module.h>
 #include <linux/sched.h>
+#include <linux/kthread.h>
 #include <linux/errno.h>
 #include <linux/delay.h>
 #include <linux/ioport.h>
@@ -1010,16 +1011,13 @@ static int kenvctrld(void *__unused)
 
 	poll_interval = 5000; /* TODO env_mon_interval */
 
-	daemonize("kenvctrld");
-	allow_signal(SIGKILL);
-
-	kenvctrld_task = current;
-
 	printk(KERN_INFO "envctrl: %s starting...\n", current->comm);
 	for (;;) {
-		if(msleep_interruptible(poll_interval))
-			break;
+		msleep_interruptible(poll_interval);
 
+		if (kthread_should_stop())
+			break;
+
 		for (whichcpu = 0; whichcpu < ENVCTRL_MAX_CPU; ++whichcpu) {
 			if (0 < envctrl_read_cpu_info(whichcpu, cputemp,
 						      ENVCTRL_CPUTEMP_MON,
@@ -1041,7 +1039,6 @@ static int kenvctrld(void *__unused)
 
 static int __init envctrl_init(void)
 {
-#ifdef CONFIG_PCI
 	struct linux_ebus *ebus = NULL;
 	struct linux_ebus_device *edev = NULL;
 	struct linux_ebus_child *edev_child = NULL;
@@ -1118,9 +1115,11 @@ static int __init envctrl_init(void)
 			i2c_childlist[i].addr, (0 == i) ? ("\n") : (" "));
 	}
 
-	err = kernel_thread(kenvctrld, NULL, CLONE_FS | CLONE_FILES);
-	if (err < 0)
+	kenvctrld_task = kthread_run(kenvctrld, NULL, "kenvctrld");
+	if (IS_ERR(kenvctrld_task)) {
+		err = PTR_ERR(kenvctrld_task);
 		goto out_deregister;
+	}
 
 	return 0;
 
@@ -1133,37 +1132,13 @@ static int __init envctrl_init(void)
 			kfree(i2c_childlist[i].tables);
 	}
 	return err;
-#else
-	return -ENODEV;
-#endif
 }
 
 static void __exit envctrl_cleanup(void)
 {
 	int i;
 
-	if (NULL != kenvctrld_task) {
-		force_sig(SIGKILL, kenvctrld_task);
-		for (;;) {
-			struct task_struct *p;
-			int found = 0;
-
-			read_lock(&tasklist_lock);
-			for_each_process(p) {
-				if (p == kenvctrld_task) {
-					found = 1;
-					break;
-				}
-			}
-			read_unlock(&tasklist_lock);
-
-			if (!found)
-				break;
-
-			msleep(1000);
-		}
-		kenvctrld_task = NULL;
-	}
+	kthread_stop(kenvctrld_task);
 
 	iounmap(i2c);
 	misc_deregister(&envctrl_dev);