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printk(KERN_DEBUG "Here I am: %s:%i\n", _ _FILE_ _, _ _LINE_ _);
printk(KERN_CRIT "I'm trashed; giving up on %p\n", ptr);
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#defineKERN_EMERG"<0>"/*½ô¼±Ê¼þÏûÏ¢£¬ÏµÍ³±ÀÀ£Ö®Ç°Ìáʾ£¬±íʾϵͳ²»¿ÉÓÃ*/
#defineKERN_ALERT"<1>"/*±¨¸æÏûÏ¢£¬±íʾ±ØÐëÁ¢¼´²ÉÈ¡´ëÊ©*/
#defineKERN_CRIT"<2>"/*ÁÙ½çÌõ¼þ£¬Í¨³£Éæ¼°ÑÏÖØµÄÓ²¼þ»òÈí¼þ²Ù×÷ʧ°Ü*/
#defineKERN_ERR"<3>"/*´íÎóÌõ¼þ£¬Çý¶¯³ÌÐò³£ÓÃKERN_ERRÀ´±¨¸æÓ²¼þµÄ´íÎó*/
#defineKERN_WARNING"<4>"/*¾¯¸æÌõ¼þ£¬¶Ô¿ÉÄܳöÏÖÎÊÌâµÄÇé¿ö½øÐо¯¸æ*/
#defineKERN_NOTICE"<5>"/*Õý³£µ«ÓÖÖØÒªµÄÌõ¼þ£¬ÓÃÓÚÌáÐÑ¡£³£ÓÃÓÚÓ밲ȫÏà¹ØµÄÏûÏ¢*/
#defineKERN_INFO"<6>"/*ÌáʾÐÅÏ¢£¬ÈçÇý¶¯³ÌÐòÆô¶¯Ê±£¬´òÓ¡Ó²¼þÐÅÏ¢*/
#defineKERN_DEBUG"<7>"/*µ÷ÊÔ¼¶±ðµÄÏûÏ¢*/
 
extern int console_printk[];
 
#define console_loglevel ¡¡(console_printk[0])
#define default_message_loglevel¡¡ (console_printk[1])
#define minimum_console_loglevel¡¡ (console_printk[2])
#define default_console_loglevel¡¡ (console_printk[3])
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/*ûÓж¨ÒåÈÕÖ¾¼¶±ðµÄprintkʹÓÃÏÂÃæµÄĬÈϼ¶±ð*/
#define DEFAULT_MESSAGE_LOGLEVEL 4 /* KERN_WARNING ¾¯¸æÌõ¼þ*/
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