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| author | Rasmus Villemoes <linux@rasmusvillemoes.dk> | 2015-11-06 16:30:35 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-11-06 17:50:42 -0800 |
| commit | d7ec9a05d6defda8432da574a2a888eed6fc29f6 (patch) | |
| tree | 453b5229f8165523c17dd4bd0baa04a281ced611 /lib/vsprintf.c | |
| parent | 317dc34ab786d4f22bf7ed8ab546b9ae57f900d0 (diff) | |
| download | lwn-d7ec9a05d6defda8432da574a2a888eed6fc29f6.tar.gz lwn-d7ec9a05d6defda8432da574a2a888eed6fc29f6.zip | |
lib/vsprintf.c: update documentation
%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>
Diffstat (limited to 'lib/vsprintf.c')
| -rw-r--r-- | lib/vsprintf.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/lib/vsprintf.c b/lib/vsprintf.c index 7848d53a5134..f9cee8e1233c 100644 --- a/lib/vsprintf.c +++ b/lib/vsprintf.c @@ -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 |