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authorRasmus Villemoes <linux@rasmusvillemoes.dk>2015-11-06 16:30:35 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-11-06 17:50:42 -0800
commitd7ec9a05d6defda8432da574a2a888eed6fc29f6 (patch)
tree453b5229f8165523c17dd4bd0baa04a281ced611 /lib
parent317dc34ab786d4f22bf7ed8ab546b9ae57f900d0 (diff)
downloadleg-kernel-d7ec9a05d6defda8432da574a2a888eed6fc29f6.tar.gz
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')
-rw-r--r--lib/vsprintf.c7
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