1 files changed, 157 insertions, 0 deletions
diff --git a/kernel/panic.c b/kernel/panic.c
new file mode 100644
index 000000000000..0fa3f3a66fb6
--- /dev/null
+++ b/kernel/panic.c
@@ -0,0 +1,157 @@
+/*
+ *  linux/kernel/panic.c
+ *
+ *  Copyright (C) 1991, 1992  Linus Torvalds
+ */
+
+/*
+ * This function is used through-out the kernel (including mm and fs)
+ * to indicate a major problem.
+ */
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/delay.h>
+#include <linux/reboot.h>
+#include <linux/notifier.h>
+#include <linux/init.h>
+#include <linux/sysrq.h>
+#include <linux/interrupt.h>
+#include <linux/nmi.h>
+
+int panic_timeout;
+int panic_on_oops;
+int tainted;
+
+EXPORT_SYMBOL(panic_timeout);
+
+struct notifier_block *panic_notifier_list;
+
+EXPORT_SYMBOL(panic_notifier_list);
+
+static int __init panic_setup(char *str)
+{
+	panic_timeout = simple_strtoul(str, NULL, 0);
+	return 1;
+}
+__setup("panic=", panic_setup);
+
+static long no_blink(long time)
+{
+	return 0;
+}
+
+/* Returns how long it waited in ms */
+long (*panic_blink)(long time);
+EXPORT_SYMBOL(panic_blink);
+
+/**
+ *	panic - halt the system
+ *	@fmt: The text string to print
+ *
+ *	Display a message, then perform cleanups.
+ *
+ *	This function never returns.
+ */
+ 
+NORET_TYPE void panic(const char * fmt, ...)
+{
+	long i;
+	static char buf[1024];
+	va_list args;
+#if defined(CONFIG_ARCH_S390)
+        unsigned long caller = (unsigned long) __builtin_return_address(0);
+#endif
+
+	bust_spinlocks(1);
+	va_start(args, fmt);
+	vsnprintf(buf, sizeof(buf), fmt, args);
+	va_end(args);
+	printk(KERN_EMERG "Kernel panic - not syncing: %s\n",buf);
+	bust_spinlocks(0);
+
+#ifdef CONFIG_SMP
+	smp_send_stop();
+#endif
+
+	notifier_call_chain(&panic_notifier_list, 0, buf);
+
+	if (!panic_blink)
+		panic_blink = no_blink;
+
+	if (panic_timeout > 0)
+	{
+		/*
+	 	 * Delay timeout seconds before rebooting the machine. 
+		 * We can't use the "normal" timers since we just panicked..
+	 	 */
+		printk(KERN_EMERG "Rebooting in %d seconds..",panic_timeout);
+		for (i = 0; i < panic_timeout*1000; ) {
+			touch_nmi_watchdog();
+			i += panic_blink(i);
+			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.
+		 */
+		machine_restart(NULL);
+	}
+#ifdef __sparc__
+	{
+		extern int stop_a_enabled;
+		/* Make sure the user can actually press L1-A */
+		stop_a_enabled = 1;
+		printk(KERN_EMERG "Press L1-A to return to the boot prom\n");
+	}
+#endif
+#if defined(CONFIG_ARCH_S390)
+        disabled_wait(caller);
+#endif
+	local_irq_enable();
+	for (i = 0;;) {
+		i += panic_blink(i);
+		mdelay(1);
+		i++;
+	}
+}
+
+EXPORT_SYMBOL(panic);
+
+/**
+ *	print_tainted - return a string to represent the kernel taint state.
+ *
+ *  'P' - Proprietary module has been loaded.
+ *  'F' - Module has been forcibly loaded.
+ *  'S' - SMP with CPUs not designed for SMP.
+ *  'R' - User forced a module unload.
+ *  'M' - Machine had a machine check experience.
+ *  'B' - System has hit bad_page.
+ *
+ *	The string is overwritten by the next call to print_taint().
+ */
+ 
+const char *print_tainted(void)
+{
+	static char buf[20];
+	if (tainted) {
+		snprintf(buf, sizeof(buf), "Tainted: %c%c%c%c%c%c",
+			tainted & TAINT_PROPRIETARY_MODULE ? 'P' : 'G',
+			tainted & TAINT_FORCED_MODULE ? 'F' : ' ',
+			tainted & TAINT_UNSAFE_SMP ? 'S' : ' ',
+			tainted & TAINT_FORCED_RMMOD ? 'R' : ' ',
+ 			tainted & TAINT_MACHINE_CHECK ? 'M' : ' ',
+			tainted & TAINT_BAD_PAGE ? 'B' : ' ');
+	}
+	else
+		snprintf(buf, sizeof(buf), "Not tainted");
+	return(buf);
+}
+
+void add_taint(unsigned flag)
+{
+	tainted |= flag;
+}
+EXPORT_SYMBOL(add_taint);