#ifndef __KERNEL_PRINTK__
  #define __KERNEL_PRINTK__

  #include <linux/init.h>

  extern const char linux_banner[];
  extern const char linux_proc_banner[];

  #define KERN_EMERG	"<0>"	/* system is unusable			*/
  #define KERN_ALERT	"<1>"	/* action must be taken immediately	*/
  #define KERN_CRIT	"<2>"	/* critical conditions			*/
  #define KERN_ERR	"<3>"	/* error conditions			*/
  #define KERN_WARNING	"<4>"	/* warning conditions			*/
  #define KERN_NOTICE	"<5>"	/* normal but significant condition	*/
  #define KERN_INFO	"<6>"	/* informational			*/
  #define KERN_DEBUG	"<7>"	/* debug-level messages			*/

  
  /* Use the default kernel loglevel */
  #define KERN_DEFAULT	"<d>"
  /*
   * Annotation for a "continued" line of log printout (only done after a
   * line that had no enclosing 
  ). Only to be used by core/arch code
   * during early bootup (a continued line is not SMP-safe otherwise).
   */

  #define KERN_CONT	"<c>"

  
  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])

  static inline void console_silent(void)
  {
  	console_loglevel = 0;
  }
  
  static inline void console_verbose(void)
  {
  	if (console_loglevel)
  		console_loglevel = 15;
  }

  struct va_format {
  	const char *fmt;
  	va_list *va;
  };
  
  /*
   * FW_BUG
   * Add this to a message where you are sure the firmware is buggy or behaves
   * really stupid or out of spec. Be aware that the responsible BIOS developer
   * should be able to fix this issue or at least get a concrete idea of the
   * problem by reading your message without the need of looking at the kernel
   * code.
   *
   * Use it for definite and high priority BIOS bugs.
   *
   * FW_WARN
   * Use it for not that clear (e.g. could the kernel messed up things already?)
   * and medium priority BIOS bugs.
   *
   * FW_INFO
   * Use this one if you want to tell the user or vendor about something
   * suspicious, but generally harmless related to the firmware.
   *
   * Use it for information or very low priority BIOS bugs.
   */
  #define FW_BUG		"[Firmware Bug]: "
  #define FW_WARN		"[Firmware Warn]: "
  #define FW_INFO		"[Firmware Info]: "
  
  /*
   * HW_ERR
   * Add this to a message for hardware errors, so that user can report
   * it to hardware vendor instead of LKML or software vendor.
   */
  #define HW_ERR		"[Hardware Error]: "

  /*
   * Dummy printk for disabled debugging statements to use whilst maintaining
   * gcc's format and side-effect checking.
   */

  static inline __printf(1, 2)

  int no_printk(const char *fmt, ...)
  {
  	return 0;
  }

  extern asmlinkage __printf(1, 2)

  void early_printk(const char *fmt, ...);
  
  extern int printk_needs_cpu(int cpu);
  extern void printk_tick(void);

  #ifdef CONFIG_PRINTK

  asmlinkage __printf(1, 0)

  int vprintk(const char *fmt, va_list args);

  asmlinkage __printf(1, 2) __cold

  int printk(const char *fmt, ...);

  
  /*
   * Please don't use printk_ratelimit(), because it shares ratelimiting state
   * with all other unrelated printk_ratelimit() callsites.  Instead use
   * printk_ratelimited() or plain old __ratelimit().
   */
  extern int __printk_ratelimit(const char *func);
  #define printk_ratelimit() __printk_ratelimit(__func__)
  extern bool printk_timed_ratelimit(unsigned long *caller_jiffies,
  				   unsigned int interval_msec);
  
  extern int printk_delay_msec;
  extern int dmesg_restrict;

  extern int kptr_restrict;

  void log_buf_kexec_setup(void);

  void __init setup_log_buf(int early);

  #else

  static inline __printf(1, 0)

  int vprintk(const char *s, va_list args)
  {
  	return 0;
  }

  static inline __printf(1, 2) __cold

  int printk(const char *s, ...)
  {
  	return 0;
  }
  static inline int printk_ratelimit(void)
  {
  	return 0;
  }
  static inline bool printk_timed_ratelimit(unsigned long *caller_jiffies,
  					  unsigned int interval_msec)
  {
  	return false;
  }

  static inline void log_buf_kexec_setup(void)
  {
  }

  
  static inline void setup_log_buf(int early)
  {
  }

  #endif

  extern void dump_stack(void) __cold;

  #ifndef pr_fmt
  #define pr_fmt(fmt) fmt
  #endif
  
  #define pr_emerg(fmt, ...) \

  	printk(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)

  #define pr_alert(fmt, ...) \

  	printk(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)

  #define pr_crit(fmt, ...) \

  	printk(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)

  #define pr_err(fmt, ...) \

  	printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)

  #define pr_warning(fmt, ...) \

  	printk(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)

  #define pr_warn pr_warning
  #define pr_notice(fmt, ...) \

  	printk(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)

  #define pr_info(fmt, ...) \

  	printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)

  #define pr_cont(fmt, ...) \
  	printk(KERN_CONT fmt, ##__VA_ARGS__)
  
  /* pr_devel() should produce zero code unless DEBUG is defined */
  #ifdef DEBUG
  #define pr_devel(fmt, ...) \
  	printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
  #else
  #define pr_devel(fmt, ...) \

  	no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)

  #endif
  
  /* If you are writing a driver, please use dev_dbg instead */
  #if defined(DEBUG)
  #define pr_debug(fmt, ...) \
  	printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
  #elif defined(CONFIG_DYNAMIC_DEBUG)
  /* dynamic_pr_debug() uses pr_fmt() internally so we don't need it here */
  #define pr_debug(fmt, ...) \
  	dynamic_pr_debug(fmt, ##__VA_ARGS__)
  #else
  #define pr_debug(fmt, ...) \

  	no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)

  #endif
  
  /*

   * Print a one-time message (analogous to WARN_ONCE() et al):
   */
  
  #ifdef CONFIG_PRINTK
  #define printk_once(fmt, ...)			\
  ({						\
  	static bool __print_once;		\
  						\
  	if (!__print_once) {			\
  		__print_once = true;		\
  		printk(fmt, ##__VA_ARGS__);	\
  	}					\
  })
  #else
  #define printk_once(fmt, ...)			\
  	no_printk(fmt, ##__VA_ARGS__)
  #endif
  
  #define pr_emerg_once(fmt, ...)					\
  	printk_once(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
  #define pr_alert_once(fmt, ...)					\
  	printk_once(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
  #define pr_crit_once(fmt, ...)					\
  	printk_once(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
  #define pr_err_once(fmt, ...)					\
  	printk_once(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
  #define pr_warn_once(fmt, ...)					\
  	printk_once(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
  #define pr_notice_once(fmt, ...)				\
  	printk_once(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
  #define pr_info_once(fmt, ...)					\
  	printk_once(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
  #define pr_cont_once(fmt, ...)					\
  	printk_once(KERN_CONT pr_fmt(fmt), ##__VA_ARGS__)
  /* If you are writing a driver, please use dev_dbg instead */
  #if defined(DEBUG)
  #define pr_debug_once(fmt, ...)					\
  	printk_once(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
  #else
  #define pr_debug_once(fmt, ...)					\
  	no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
  #endif
  
  /*

   * ratelimited messages with local ratelimit_state,
   * no local ratelimit_state used in the !PRINTK case
   */
  #ifdef CONFIG_PRINTK

  #define printk_ratelimited(fmt, ...)					\
  ({									\

  	static DEFINE_RATELIMIT_STATE(_rs,				\
  				      DEFAULT_RATELIMIT_INTERVAL,	\
  				      DEFAULT_RATELIMIT_BURST);		\
  									\
  	if (__ratelimit(&_rs))						\
  		printk(fmt, ##__VA_ARGS__);				\
  })
  #else

  #define printk_ratelimited(fmt, ...)					\
  	no_printk(fmt, ##__VA_ARGS__)

  #endif

  #define pr_emerg_ratelimited(fmt, ...)					\

  	printk_ratelimited(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)

  #define pr_alert_ratelimited(fmt, ...)					\

  	printk_ratelimited(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)

  #define pr_crit_ratelimited(fmt, ...)					\

  	printk_ratelimited(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)

  #define pr_err_ratelimited(fmt, ...)					\

  	printk_ratelimited(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)

  #define pr_warn_ratelimited(fmt, ...)					\

  	printk_ratelimited(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)

  #define pr_notice_ratelimited(fmt, ...)					\

  	printk_ratelimited(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)

  #define pr_info_ratelimited(fmt, ...)					\

  	printk_ratelimited(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
  /* no pr_cont_ratelimited, don't do that... */
  /* If you are writing a driver, please use dev_dbg instead */
  #if defined(DEBUG)

  #define pr_debug_ratelimited(fmt, ...)					\

  	printk_ratelimited(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
  #else
  #define pr_debug_ratelimited(fmt, ...) \

  	no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)

  #endif

  enum {
  	DUMP_PREFIX_NONE,
  	DUMP_PREFIX_ADDRESS,
  	DUMP_PREFIX_OFFSET
  };
  extern void hex_dump_to_buffer(const void *buf, size_t len,
  			       int rowsize, int groupsize,
  			       char *linebuf, size_t linebuflen, bool ascii);
  #ifdef CONFIG_PRINTK
  extern void print_hex_dump(const char *level, const char *prefix_str,
  			   int prefix_type, int rowsize, int groupsize,
  			   const void *buf, size_t len, bool ascii);
  extern void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
  				 const void *buf, size_t len);
  #else
  static inline void print_hex_dump(const char *level, const char *prefix_str,
  				  int prefix_type, int rowsize, int groupsize,
  				  const void *buf, size_t len, bool ascii)
  {
  }
  static inline void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
  					const void *buf, size_t len)
  {
  }
  
  #endif

  #endif