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vsprintf: Recursive vsnprintf: Add "%pV", struct va_format

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Add the ability to print a format and va_list from a structure pointer

Allows __dev_printk to be implemented as a single printk while
minimizing string space duplication.

%pV should not be used without some mechanism to verify the
format and argument use ala __attribute__(format (printf(...))).

Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Joe Perches 2010-06-27 01:02:33 +00:00 • committed by David S. Miller
parent e490c1defe
commit 7db6f5fb65
2 changed files with 14 additions and 0 deletions
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5
include/linux/kernel.h
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@ -171,6 +171,11 @@ static inline void might_fault(void)
}
#endif
struct va_format {
const char *fmt;
va_list *va;
};
extern struct atomic_notifier_head panic_notifier_list;
extern long (*panic_blink)(long time);
NORET_TYPE void panic(const char * fmt, ...)