From: Nick Alcock <nick.alcock@oracle.com>
Date: Mon, 25 Mar 2013 16:43:49 +0000 (+0000)
Subject: ctf: sentinelize str_appendn()
X-Git-Tag: v4.1.12-92~313^2~87
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=a13ada02dc89f7d0751bccaf909fa7d6ddd5860f;p=users%2Fjedix%2Flinux-maple.git

ctf: sentinelize str_appendn()

str_appendn() takes a variable argument list of items to append, terminated by a
NULL.  Every single time I have used it, I have forgotten the NULL.

Add a sentinel attribute to make it harder to forget in future.

Signed-off-by: Nick Alcock <nick.alcock@oracle.com>
---

diff --git a/scripts/dwarf2ctf/dwarf2ctf.c b/scripts/dwarf2ctf/dwarf2ctf.c
index 8726b652ef3a..beca89222abf 100644
--- a/scripts/dwarf2ctf/dwarf2ctf.c
+++ b/scripts/dwarf2ctf/dwarf2ctf.c
@@ -592,7 +592,8 @@ static char *str_append(char *s, const char *append)
 /*
  * A vararg string appender.
  */
-static char *str_appendn(char *s, ...) __attribute__((__warn_unused_result__));
+static char *str_appendn(char *s, ...)
+	__attribute__((__warn_unused_result__, sentinel));
 
 /*
  * An error-checking strdup().