From mboxrd@z Thu Jan 1 00:00:00 1970 From: Antonio Quartulli Subject: [PATCH 03/15] batman-adv: add biggest_unsigned_int(x) macro Date: Wed, 25 Apr 2012 15:26:59 +0200 Message-ID: <1335360431-30027-4-git-send-email-ordex@autistici.org> References: <1335360431-30027-1-git-send-email-ordex@autistici.org> Cc: netdev@vger.kernel.org, b.a.t.m.a.n@lists.open-mesh.org, Antonio Quartulli To: davem@davemloft.net Return-path: Received: from investici.nine.ch ([217.150.252.179]:38755 "EHLO confino.investici.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754759Ab2DYN0Q (ORCPT ); Wed, 25 Apr 2012 09:26:16 -0400 In-Reply-To: <1335360431-30027-1-git-send-email-ordex@autistici.org> Sender: netdev-owner@vger.kernel.org List-ID: in case of dynamic type variable, it could be needed to compute at compile time its maximal value. This macro helps in doing that for unsigned integer types Signed-off-by: Antonio Quartulli --- net/batman-adv/main.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/batman-adv/main.h b/net/batman-adv/main.h index a2b18d0..d9ef4ca 100644 --- a/net/batman-adv/main.h +++ b/net/batman-adv/main.h @@ -221,6 +221,9 @@ static inline bool has_timed_out(unsigned long timestamp, unsigned int timeout) /* Returns the smallest signed integer in two's complement with the sizeof x */ #define smallest_signed_int(x) (1u << (7u + 8u * (sizeof(x) - 1u))) +/* Returns the biggest unsigned integer with the sizeof x */ +#define biggest_unsigned_int(x) (~(x)0) + /* Checks if a sequence number x is a predecessor/successor of y. * they handle overflows/underflows and can correctly check for a * predecessor/successor unless the variable sequence number has grown by -- 1.7.9.4