panic.c

860阅读 0评论2009-08-05 jhluroom
分类:LINUX

/*
 * linux/kernel/panic.c
 *
 * (C) 1991 Linus Torvalds
 */


/*
 * This function is used through-out the kernel (includeinh mm and fs)
 * to indicate a major problem.
 */

#include <linux/kernel.h>
#include <linux/sched.h>

void sys_sync(void);    /* it's really int int sys_sync(void)*/

volatile void panic(const char * s)//用于显示系统内核错误,并使系统进入死循环(死机),volatile说明本函数无参数返回

{
    printk("Kernel panic: %s\n\r",s);
    if (current == task[0])//如果是任务0的话,是空闲进程,不会修改内核数据,和文件系统没有瓜葛,所以不用调用sys_sync

        printk("In swapper task - not syncing\n\r");
    else
        sys_sync();//系统同步

    for(;;);//进入死循环(死机)

}

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