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From: Rasmus Villemoes <linux@rasmusvillemoes.dk>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Tejun Heo <tj@kernel.org>,
	Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
	linux-kernel@vger.kernel.org, Kees Cook <keescook@chromium.org>,
	Rasmus Villemoes <linux@rasmusvillemoes.dk>
Subject: [PATCH 3/4] lib/vsprintf.c: Remove SPECIAL handling in pointer()
Date: Fri, 25 Sep 2015 19:41:04 +0200	[thread overview]
Message-ID: <1443202865-25533-4-git-send-email-linux@rasmusvillemoes.dk> (raw)
In-Reply-To: <1443202865-25533-1-git-send-email-linux@rasmusvillemoes.dk>

As a quick

   git grep -E '%[ +0#-]*#[ +0#-]*(\*|[0-9]+)?(\.(\*|[0-9]+)?)?p'

shows, nobody uses the # flag with %p. Moreover, I think users are
unlikely to show up since gcc will complain with

  warning: `#' flag used with ‘%p’ gnu_printf format [-Wformat]

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 <linux@rasmusvillemoes.dk>
---
 lib/vsprintf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 03fa10b4be96..98b0d7be3fb7 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -1457,7 +1457,7 @@ 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') {
 		/*
-- 
2.1.3


  parent reply	other threads:[~2015-09-25 17:41 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-09-25 17:41 [PATCH 0/4] printf stuff Rasmus Villemoes
2015-09-25 17:41 ` [PATCH 1/4] lib/vsprintf.c: handle invalid format specifiers more robustly Rasmus Villemoes
2015-09-28  8:08   ` Andy Shevchenko
2015-09-28 20:12     ` Rasmus Villemoes
2015-09-28 22:30   ` Kees Cook
2015-09-25 17:41 ` [PATCH 2/4] lib/vsprintf.c: also improve sanity check in bstr_printf() Rasmus Villemoes
2015-09-28 22:31   ` Kees Cook
2015-09-25 17:41 ` Rasmus Villemoes [this message]
2015-09-28  8:55   ` [PATCH 3/4] lib/vsprintf.c: Remove SPECIAL handling in pointer() Andy Shevchenko
2015-09-25 17:41 ` [PATCH 4/4] test_printf: test printf family at runtime Rasmus Villemoes
2015-09-28  9:12   ` Andy Shevchenko
2015-09-28 20:55     ` Rasmus Villemoes
2015-09-30  6:38       ` Andy Shevchenko
2015-09-30  8:56         ` Rasmus Villemoes
2015-09-28 22:38   ` Kees Cook
2015-09-29  7:10     ` Rasmus Villemoes
2015-09-29 17:32       ` Kees Cook
2015-09-30  9:05         ` Rasmus Villemoes
2015-09-30 15:30 ` [PATCH v2 0/4] printf stuff Rasmus Villemoes
2015-09-30 15:30   ` [PATCH v2 1/4] lib/vsprintf.c: handle invalid format specifiers more robustly Rasmus Villemoes
2015-09-30 15:30   ` [PATCH v2 2/4] lib/vsprintf.c: also improve sanity check in bstr_printf() Rasmus Villemoes
2015-09-30 15:30   ` [PATCH v2 3/4] lib/vsprintf.c: Remove SPECIAL handling in pointer() Rasmus Villemoes
2015-09-30 15:40     ` Andy Shevchenko
2015-09-30 15:30   ` [PATCH v2 4/4] test_printf: test printf family at runtime Rasmus Villemoes

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