Merge with master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6.git

5 files changed, 85 insertions, 58 deletions

diff --git a/kernel/panic.c b/kernel/panic.c
index 74ba5f3..aabc5f8 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -111,12 +111,11 @@ NORET_TYPE void panic(const char * fmt, ...)
 			mdelay(1);
 			i++;
 		}
-		/*
-		 *	Should we run the reboot notifier. For the moment Im
-		 *	choosing not too. It might crash, be corrupt or do
-		 *	more harm than good for other reasons.
+		/*	This will not be a clean reboot, with everything
+		 *	shutting down.  But if there is a chance of
+		 *	rebooting the system it will be rebooted.
 		 */
-		machine_restart(NULL);
+		emergency_restart();
 	}
 #ifdef __sparc__
 	{
diff --git a/kernel/power/disk.c b/kernel/power/disk.c
index 3ec789c..664eb04 100644
--- a/kernel/power/disk.c
+++ b/kernel/power/disk.c
@@ -59,16 +59,13 @@ static void power_down(suspend_disk_method_t mode)
 		error = pm_ops->enter(PM_SUSPEND_DISK);
 		break;
 	case PM_DISK_SHUTDOWN:
-		printk("Powering off system\n");
-		device_shutdown();
-		machine_power_off();
+		kernel_power_off();
 		break;
 	case PM_DISK_REBOOT:
-		device_shutdown();
-		machine_restart(NULL);
+		kernel_restart(NULL);
 		break;
 	}
-	machine_halt();
+	kernel_halt();
 	/* Valid image is on the disk, if we continue we risk serious data corruption
 	   after resume. */
 	printk(KERN_CRIT "Please power me down manually\n");
diff --git a/kernel/power/poweroff.c b/kernel/power/poweroff.c
index 715081b..7a4144b 100644
--- a/kernel/power/poweroff.c
+++ b/kernel/power/poweroff.c
@@ -9,6 +9,7 @@
 #include <linux/init.h>
 #include <linux/pm.h>
 #include <linux/workqueue.h>
+#include <linux/reboot.h>
 
 /*
  * When the user hits Sys-Rq o to power down the machine this is the
@@ -17,8 +18,7 @@
 
 static void do_poweroff(void *dummy)
 {
-	if (pm_power_off)
-		pm_power_off();
+	kernel_power_off();
 }
 
 static DECLARE_WORK(poweroff_work, do_poweroff, NULL);
diff --git a/kernel/sched.c b/kernel/sched.c
index 4107db0..a646e4f 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -3486,7 +3486,7 @@ static void __setscheduler(struct task_struct *p, int policy, int prio)
 	p->policy = policy;
 	p->rt_priority = prio;
 	if (policy != SCHED_NORMAL)
-		p->prio = MAX_USER_RT_PRIO-1 - p->rt_priority;
+		p->prio = MAX_RT_PRIO-1 - p->rt_priority;
 	else
 		p->prio = p->static_prio;
 }
@@ -3518,7 +3518,8 @@ recheck:
 	 * 1..MAX_USER_RT_PRIO-1, valid priority for SCHED_NORMAL is 0.
 	 */
 	if (param->sched_priority < 0 ||
-	    param->sched_priority > MAX_USER_RT_PRIO-1)
+	    (p->mm &&  param->sched_priority > MAX_USER_RT_PRIO-1) ||
+	    (!p->mm && param->sched_priority > MAX_RT_PRIO-1))
 		return -EINVAL;
 	if ((policy == SCHED_NORMAL) != (param->sched_priority == 0))
 		return -EINVAL;
@@ -3528,7 +3529,8 @@ recheck:
 	 */
 	if (!capable(CAP_SYS_NICE)) {
 		/* can't change policy */
-		if (policy != p->policy)
+		if (policy != p->policy &&
+			!p->signal->rlim[RLIMIT_RTPRIO].rlim_cur)
 			return -EPERM;
 		/* can't increase priority */
 		if (policy != SCHED_NORMAL &&
diff --git a/kernel/sys.c b/kernel/sys.c
index 9a24374..a7403903 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -361,6 +361,68 @@ out_unlock:
 	return retval;
 }
 
+void emergency_restart(void)
+{
+	machine_emergency_restart();
+}
+EXPORT_SYMBOL_GPL(emergency_restart);
+
+void kernel_restart(char *cmd)
+{
+	notifier_call_chain(&reboot_notifier_list, SYS_RESTART, cmd);
+	system_state = SYSTEM_RESTART;
+	device_suspend(PMSG_FREEZE);
+	device_shutdown();
+	if (!cmd) {
+		printk(KERN_EMERG "Restarting system.\n");
+	} else {
+		printk(KERN_EMERG "Restarting system with command '%s'.\n", cmd);
+	}
+	printk(".\n");
+	machine_restart(cmd);
+}
+EXPORT_SYMBOL_GPL(kernel_restart);
+
+void kernel_kexec(void)
+{
+#ifdef CONFIG_KEXEC
+	struct kimage *image;
+	image = xchg(&kexec_image, 0);
+	if (!image) {
+		return;
+	}
+	notifier_call_chain(&reboot_notifier_list, SYS_RESTART, NULL);
+	system_state = SYSTEM_RESTART;
+	device_suspend(PMSG_FREEZE);
+	device_shutdown();
+	printk(KERN_EMERG "Starting new kernel\n");
+	machine_shutdown();
+	machine_kexec(image);
+#endif
+}
+EXPORT_SYMBOL_GPL(kernel_kexec);
+
+void kernel_halt(void)
+{
+	notifier_call_chain(&reboot_notifier_list, SYS_HALT, NULL);
+	system_state = SYSTEM_HALT;
+	device_suspend(PMSG_SUSPEND);
+	device_shutdown();
+	printk(KERN_EMERG "System halted.\n");
+	machine_halt();
+}
+EXPORT_SYMBOL_GPL(kernel_halt);
+
+void kernel_power_off(void)
+{
+	notifier_call_chain(&reboot_notifier_list, SYS_POWER_OFF, NULL);
+	system_state = SYSTEM_POWER_OFF;
+	device_suspend(PMSG_SUSPEND);
+	device_shutdown();
+	printk(KERN_EMERG "Power down.\n");
+	machine_power_off();
+}
+EXPORT_SYMBOL_GPL(kernel_power_off);
 
 /*
  * Reboot system call: for obvious reasons only root may call it,
@@ -389,11 +451,7 @@ asmlinkage long sys_reboot(int magic1, int magic2, unsigned int cmd, void __user
 	lock_kernel();
 	switch (cmd) {
 	case LINUX_REBOOT_CMD_RESTART:
-		notifier_call_chain(&reboot_notifier_list, SYS_RESTART, NULL);
-		system_state = SYSTEM_RESTART;
-		device_shutdown();
-		printk(KERN_EMERG "Restarting system.\n");
-		machine_restart(NULL);
+		kernel_restart(NULL);
 		break;
 
 	case LINUX_REBOOT_CMD_CAD_ON:
@@ -405,23 +463,13 @@ asmlinkage long sys_reboot(int magic1, int magic2, unsigned int cmd, void __user
 		break;
 
 	case LINUX_REBOOT_CMD_HALT:
-		notifier_call_chain(&reboot_notifier_list, SYS_HALT, NULL);
-		system_state = SYSTEM_HALT;
-		device_suspend(PMSG_SUSPEND);
-		device_shutdown();
-		printk(KERN_EMERG "System halted.\n");
-		machine_halt();
+		kernel_halt();
 		unlock_kernel();
 		do_exit(0);
 		break;
 
 	case LINUX_REBOOT_CMD_POWER_OFF:
-		notifier_call_chain(&reboot_notifier_list, SYS_POWER_OFF, NULL);
-		system_state = SYSTEM_POWER_OFF;
-		device_suspend(PMSG_SUSPEND);
-		device_shutdown();
-		printk(KERN_EMERG "Power down.\n");
-		machine_power_off();
+		kernel_power_off();
 		unlock_kernel();
 		do_exit(0);
 		break;
@@ -433,32 +481,14 @@ asmlinkage long sys_reboot(int magic1, int magic2, unsigned int cmd, void __user
 		}
 		buffer[sizeof(buffer) - 1] = '\0';
 
-		notifier_call_chain(&reboot_notifier_list, SYS_RESTART, buffer);
-		system_state = SYSTEM_RESTART;
-		device_suspend(PMSG_FREEZE);
-		device_shutdown();
-		printk(KERN_EMERG "Restarting system with command '%s'.\n", buffer);
-		machine_restart(buffer);
+		kernel_restart(buffer);
 		break;
 
-#ifdef CONFIG_KEXEC
 	case LINUX_REBOOT_CMD_KEXEC:
-	{
-		struct kimage *image;
-		image = xchg(&kexec_image, 0);
-		if (!image) {
-			unlock_kernel();
-			return -EINVAL;
-		}
-		notifier_call_chain(&reboot_notifier_list, SYS_RESTART, NULL);
-		system_state = SYSTEM_RESTART;
-		device_shutdown();
-		printk(KERN_EMERG "Starting new kernel\n");
-		machine_shutdown();
-		machine_kexec(image);
-		break;
-	}
-#endif
+		kernel_kexec();
+		unlock_kernel();
+		return -EINVAL;
+
 #ifdef CONFIG_SOFTWARE_SUSPEND
 	case LINUX_REBOOT_CMD_SW_SUSPEND:
 		{
@@ -478,8 +508,7 @@ asmlinkage long sys_reboot(int magic1, int magic2, unsigned int cmd, void __user
 
 static void deferred_cad(void *dummy)
 {
-	notifier_call_chain(&reboot_notifier_list, SYS_RESTART, NULL);
-	machine_restart(NULL);
+	kernel_restart(NULL);
 }
 
 /*