Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753111AbbDSTE0 (ORCPT ); Sun, 19 Apr 2015 15:04:26 -0400 Received: from mail-lb0-f169.google.com ([209.85.217.169]:35862 "EHLO mail-lb0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752607AbbDSTEU (ORCPT ); Sun, 19 Apr 2015 15:04:20 -0400 From: Mateusz Kulikowski To: joe@perches.com, apw@canonical.com Cc: Mateusz Kulikowski , davem@davemloft.net, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 2/2] checkpatch: suggest using eth_zero_addr() and eth_broadcast_addr() Date: Sun, 19 Apr 2015 21:04:06 +0200 Message-Id: <1429470246-15988-3-git-send-email-mateusz.kulikowski@gmail.com> X-Mailer: git-send-email 1.8.4.1 In-Reply-To: <1429470246-15988-1-git-send-email-mateusz.kulikowski@gmail.com> References: <1429470246-15988-1-git-send-email-mateusz.kulikowski@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1447 Lines: 42 Suggest using eth_zero_addr() or eth_broadcast_addr() if memset is used instead. Signed-off-by: Mateusz Kulikowski --- scripts/checkpatch.pl | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl index 3a1a01e..1fc0819 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -5042,6 +5042,22 @@ sub process { "Prefer ether_addr_equal() or ether_addr_equal_unaligned() over memcmp()\n" . $herecurr) } +# check for memset(foo, 0x0, ETH_ALEN) that could be eth_zero_addr +# check for memset(foo, 0xFF, ETH_ALEN) that could be eth_broadcast_addr + if ($^V && $^V ge 5.10.0 && + $line =~ /^\+(?:.*?)\bmemset\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\,\s*ETH_ALEN\s*\)/s) { + + my $ms_val = $7; + + if ($ms_val =~ /^(0x|)0$/i) { + WARN("PREFER_ETH_ZERO_ADDR", + "Prefer eth_zero_addr over memset()\n" . $herecurr); + } elsif ($ms_val =~ /^0xff$/i) { + WARN("PREFER_ETH_BROADCAST_ADDR", + "Prefer eth_broadcast_addr() over memset()\n" . $herecurr); + } + } + # typecasts on min/max could be min_t/max_t if ($^V && $^V ge 5.10.0 && defined $stat && -- 1.8.4.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/