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-rw-r--r--kernel/panic.c9
-rw-r--r--kernel/power/disk.c9
-rw-r--r--kernel/power/poweroff.c4
-rw-r--r--kernel/sched.c8
-rw-r--r--kernel/sys.c113
5 files changed, 85 insertions, 58 deletions
diff --git a/kernel/panic.c b/kernel/panic.c
index 74ba5f3e46c7..aabc5f86fa3f 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 3ec789c6b537..664eb0469b6e 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 715081b2d829..7a4144ba3afd 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 4107db0dc091..a646e4f36c41 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 9a24374c23bc..a74039036fb4 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);
}
/*
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 23:31:16 +0100