Kernel/panic.c
25532 /* 25533 * linux/kernel/panic.c 25534 * 25535 * Copyright (C) 1991, 1992 Linus Torvalds 25536 */ 25537 25538 /* This function is used through-out the kernel 25539 * (including mm and fs) to indicate a major problem. */ 25540 #include <linux/sched.h> 25541 #include <linux/delay.h> 25542 #include <linux/reboot.h> 25543 #include <linux/init.h> 25544 #include <linux/sysrq.h> 25545 #include <linux/interrupt.h> 25546 25547 #ifdef __alpha__ 25548 #include <asm/machvec.h> 25549 #endif 25550 25551 asmlinkage void sys_sync(void); /* it's really int */ 25552 extern void unblank_console(void); 25553 extern int C_A_D; 25554 25555 int panic_timeout = 0; 25556 25557 void __init panic_setup(char *str, int *ints) 25558 { 25559 if (ints[0] == 1) 25560 panic_timeout = ints[1]; 25561 } 25562 25563 NORET_TYPE void panic(const char * fmt, ...) 25564 { 25565 static char buf[1024]; 25566 va_list args; 25567 25568 va_start(args, fmt); 25569 vsprintf(buf, fmt, args); 25570 va_end(args); 25571 printk(KERN_EMERG "Kernel panic: %s\n",buf); 25572 if (current == task[0]) 25573 printk(KERN_EMERG "In swapper task - not syncing\n"); 25574 else if (in_interrupt()) 25575 printk(KERN_EMERG 25576 "In interrupt handler - not syncing\n"); 25577 else 25578 sys_sync(); 25579 25580 unblank_console(); 25581 25582 #ifdef __SMP__ 25583 smp_send_stop(); 25584 #endif 25585 if (panic_timeout > 0) 25586 { 25587 /* Delay timeout seconds before rebooting the 25588 * machine. We can't use the "normal" timers since 25589 * we just panicked.. */ 25590 printk(KERN_EMERG 25591 "Rebooting in %d seconds..", panic_timeout); 25592 mdelay(panic_timeout*1000); 25593 /* Should we run the reboot notifier. For the moment 25594 * I'm choosing not to. It might crash, be corrupt, 25595 * or do more harm than good for other reasons. */ 25596 machine_restart(NULL); 25597 } 25598 #ifdef __sparc__ 25599 printk("Press L1-A to return to the boot prom\n"); 25600 #endif 25601 #ifdef __alpha__ 25602 if (alpha_using_srm) 25603 halt(); 25604 #endif 25605 sti(); 25606 for(;;) { 25607 CHECK_EMERGENCY_SYNC 25608 } 25609 }
