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Commit 16cb839f authored by Joe Perches's avatar Joe Perches Committed by Linus Torvalds
Browse files

include/linux/printk.h: add pr_<level>_once macros 



- Move printk_once definitions and add an #ifdef CONFIG_PRINTK

- Add pr_<level>_once so printks can use pr_fmt

Signed-off-by: default avatarJoe Perches <joe@perches.com>
Cc: Matt Mackall <mpm@selenic.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 5264f2f7

include/linux/printk.h

+44 −15
Original line number Diff line number Diff line
@@ -112,18 +112,6 @@ extern int printk_delay_msec; 
extern int dmesg_restrict;

extern int kptr_restrict;



/*

 * Print a one-time message (analogous to WARN_ONCE() et al):

 */

#define printk_once(x...) ({			\

	static bool __print_once;		\

						\

	if (!__print_once) {			\

		__print_once = true;		\

		printk(x);			\

	}					\

})



void log_buf_kexec_setup(void);

#else

static inline __attribute__ ((format (printf, 1, 0)))
@@ -146,9 +134,6 @@ static inline bool printk_timed_ratelimit(unsigned long *caller_jiffies, 
	return false;

}



/* No effect, but we still get type checking even in the !PRINTK case: */

#define printk_once(fmt, ...) no_printk(fmt, ##__VA_ARGS__)



static inline void log_buf_kexec_setup(void)

{

}
@@ -214,6 +199,50 @@ extern void print_hex_dump_bytes(const char *prefix_str, int prefix_type, 
	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