#include <linux/notifier.h>
#include <linux/init.h>
#include <linux/sysrq.h>
-#include <linux/syscalls.h>
#include <linux/interrupt.h>
#include <linux/nmi.h>
-#ifdef CONFIG_KEXEC
#include <linux/kexec.h>
-#endif
-int panic_timeout = 900;
-int panic_on_oops = 1;
+int panic_timeout;
+int panic_on_oops;
int tainted;
-void (*dump_function_ptr)(const char *, const struct pt_regs *) = 0;
EXPORT_SYMBOL(panic_timeout);
-EXPORT_SYMBOL(dump_function_ptr);
struct notifier_block *panic_notifier_list;
}
__setup("panic=", panic_setup);
-int netdump_mode = 0;
-EXPORT_SYMBOL_GPL(netdump_mode);
+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. Functions in the panic
- * notifier list are called after the filesystem cache is flushed (when possible).
+ * 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)
+#if defined(CONFIG_S390)
unsigned long caller = (unsigned long) __builtin_return_address(0);
#endif
+ /*
+ * It's possible to come here directly from a panic-assertion and not
+ * have preempt disabled. Some functions called from here want
+ * preempt to be disabled. No point enabling it later though...
+ */
+ preempt_disable();
+
bust_spinlocks(1);
va_start(args, fmt);
vsnprintf(buf, sizeof(buf), fmt, args);
va_end(args);
-
- printk(KERN_EMERG "Kernel panic: %s\n",buf);
- if (netdump_func)
- BUG();
- if (in_interrupt())
- printk(KERN_EMERG "In interrupt handler - not syncing\n");
- else if (!current->pid)
- printk(KERN_EMERG "In idle task - not syncing\n");
- else
- sys_sync();
+ printk(KERN_EMERG "Kernel panic - not syncing: %s\n",buf);
bust_spinlocks(0);
- notifier_call_chain(&panic_notifier_list, 0, buf);
-
+ /*
+ * If we have crashed and we have a crash kernel loaded let it handle
+ * everything else.
+ * Do we want to call this before we try to display a message?
+ */
+ crash_kexec(NULL);
+
#ifdef CONFIG_SMP
+ /*
+ * Note smp_send_stop is the usual smp shutdown function, which
+ * unfortunately means it may not be hardened to work in a panic
+ * situation.
+ */
smp_send_stop();
#endif
+ notifier_call_chain(&panic_notifier_list, 0, buf);
+
+ if (!panic_blink)
+ panic_blink = no_blink;
+
if (panic_timeout > 0) {
- int i;
/*
* 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);
-#ifdef CONFIG_KEXEC
-{
- struct kimage *image;
- image = xchg(&kexec_image, 0);
- if (image) {
- printk(KERN_EMERG "by starting a new kernel ..\n");
- mdelay(panic_timeout*1000);
- machine_kexec(image);
- }
- }
-#endif
- for (i = 0; i < panic_timeout; i++) {
+ for (i = 0; i < panic_timeout*1000; ) {
touch_nmi_watchdog();
- mdelay(1000);
+ 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.
+ /* 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__
{
extern int stop_a_enabled;
- /* Make sure the user can actually press L1-A */
+ /* Make sure the user can actually press Stop-A (L1-A) */
stop_a_enabled = 1;
- printk(KERN_EMERG "Press L1-A to return to the boot prom\n");
+ printk(KERN_EMERG "Press Stop-A (L1-A) to return to the boot prom\n");
}
#endif
-#if defined(CONFIG_ARCH_S390)
+#if defined(CONFIG_S390)
disabled_wait(caller);
#endif
local_irq_enable();
- for (;;)
- ;
+ for (i = 0;;) {
+ touch_softlockup_watchdog();
+ i += panic_blink(i);
+ mdelay(1);
+ i++;
+ }
}
EXPORT_SYMBOL(panic);
* '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().
*/
{
static char buf[20];
if (tainted) {
- snprintf(buf, sizeof(buf), "Tainted: %c%c%c",
+ 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_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);
git://git.onelab.eu / linux-2.6.git / blobdiff