From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S967508Ab3E3GE6 (ORCPT ); Thu, 30 May 2013 02:04:58 -0400 Received: from intranet.asianux.com ([58.214.24.6]:45947 "EHLO intranet.asianux.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S967530Ab3E3GEl (ORCPT ); Thu, 30 May 2013 02:04:41 -0400 X-Spam-Score: -100.8 Message-ID: <51A6EBC5.7040601@asianux.com> Date: Thu, 30 May 2013 14:03:49 +0800 From: Chen Gang User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130110 Thunderbird/17.0.2 MIME-Version: 1.0 To: edumazet@google.com, Pravin Shelar , mgorman@suse.de CC: David Miller , Andrew Morton , "linux-kernel@vger.kernel.org" , netdev Subject: [PATCH] include/linux/skbuff.h: using '0xffff' instead of '~0U' Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Both 'transport_header' and 'mac_header' are u16, which are never equal to '~0U'. So need use '0xffff' instead of '~0U'. The related warning (with EXTRA_CFLAGS=-W ARCH=m68k for allmodconfig) include/linux/skbuff.h:1587:2: warning: comparison is always true due to limited range of data type [-Wtype-limits] ... Signed-off-by: Chen Gang --- include/linux/skbuff.h | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 2e0ced1..03ba058 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -1581,7 +1581,7 @@ static inline void skb_set_inner_mac_header(struct sk_buff *skb, } static inline bool skb_transport_header_was_set(const struct sk_buff *skb) { - return skb->transport_header != ~0U; + return skb->transport_header != 0xffff; } static inline unsigned char *skb_transport_header(const struct sk_buff *skb) @@ -1624,7 +1624,7 @@ static inline unsigned char *skb_mac_header(const struct sk_buff *skb) static inline int skb_mac_header_was_set(const struct sk_buff *skb) { - return skb->mac_header != ~0U; + return skb->mac_header != 0xffff; } static inline void skb_reset_mac_header(struct sk_buff *skb) -- 1.7.7.6