From 80c9eb46fa7236c1236ec695bfa2403c10cb8645 Mon Sep 17 00:00:00 2001 From: Rasmus Villemoes Date: Fri, 6 Nov 2015 16:30:26 -0800 Subject: [PATCH] lib/vsprintf.c: remove SPECIAL handling in pointer() As a quick git grep -E '%[ +0#-]*#[ +0#-]*(\*|[0-9]+)?(\.(\*|[0-9]+)?)?p' shows, nobody uses the # flag with %p. Should one try to do so, one will be met with warning: `#' flag used with `%p' gnu_printf format [-Wformat] (POSIX and C99 both say "... For other conversion specifiers, the behavior is undefined.". Obviously, the kernel can choose to define the behaviour however it wants, but as long as gcc issues that warning, users are unlikely to show up.) Since default_width is effectively always 2*sizeof(void*), we can simplify the prologue of pointer() and save a few instructions. Signed-off-by: Rasmus Villemoes Reviewed-by: Andy Shevchenko Acked-by: Kees Cook Cc: Martin Kletzander Cc: Rasmus Villemoes Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- lib/vsprintf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/lib/vsprintf.c b/lib/vsprintf.c index a513469e9399..7848d53a5134 100644 --- a/lib/vsprintf.c +++ b/lib/vsprintf.c @@ -1460,7 +1460,7 @@ static noinline_for_stack char *pointer(const char *fmt, char *buf, char *end, void *ptr, struct printf_spec spec) { - int default_width = 2 * sizeof(void *) + (spec.flags & SPECIAL ? 2 : 0); + const int default_width = 2 * sizeof(void *); if (!ptr && *fmt != 'K') { /* -- GitLab