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lib/vsprintf.c: update documentation

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%n is no longer just ignored; it results in early return from vsnprintf.
Also add a request to add test cases for future %p extensions.

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Rasmus Villemoes 2015-11-06 16:30:35 -08:00 • committed by Linus Torvalds
parent 317dc34ab7
commit d7ec9a05d6
2 changed files with 10 additions and 9 deletions
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lib/vsprintf.c
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@ -1448,7 +1448,6 @@ int kptr_restrict __read_mostly;
* - 'Cn' For a clock, it prints the name (Common Clock Framework) or address
* (legacy clock framework) of the clock
* - 'Cr' For a clock, it prints the current rate of the clock
* - 'n' For ignored argument
*
* ** Please update also Documentation/printk-formats.txt when making changes **
*
@ -1814,8 +1813,10 @@ qualifier:
* @fmt: The format string to use
* @args: Arguments for the format string
*
* This function follows C99 vsnprintf, but has some extensions:
* %n is ignored
* This function generally follows C99 vsnprintf, but has some
* extensions and a few limitations:
*
* %n is unsupported
* %p* is handled by pointer()
*
* See pointer() or Documentation/printk-formats.txt for more