From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752655AbaJLXBa (ORCPT ); Sun, 12 Oct 2014 19:01:30 -0400 Received: from smtprelay0231.hostedemail.com ([216.40.44.231]:45463 "EHLO smtprelay.hostedemail.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752340AbaJLXB3 (ORCPT ); Sun, 12 Oct 2014 19:01:29 -0400 X-Session-Marker: 6A6F6540706572636865732E636F6D X-Spam-Summary: 2,0,0,,d41d8cd98f00b204,joe@perches.com,:::::::::,RULES_HIT:41:69:355:379:541:599:973:988:989:1260:1261:1277:1311:1313:1314:1345:1359:1373:1437:1515:1516:1518:1534:1542:1593:1594:1605:1711:1730:1747:1777:1792:2393:2559:2562:2693:2828:3138:3139:3140:3141:3142:3622:3865:3866:3868:3870:3871:3872:3874:4250:4321:4605:5007:7652:7903:9592:10004:10400:10848:11026:11232:11658:11914:12296:12517:12519:12555:12740:13138:13141:13161:13229:13230:13231:21060:21080,0,RBL:none,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fn,MSBL:0,DNSBL:none,Custom_rules:0:0:0 X-HE-Tag: goose40_810eeba808b61 X-Filterd-Recvd-Size: 3408 Message-ID: <1413154885.22149.49.camel@joe-AO725> Subject: Re: [PATCH] Crypto: gf128mul : fixed a parentheses coding style issue From: Joe Perches To: Mike Roocroft Cc: herbert@gondor.apana.org.au, davem@davemloft.net, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org Date: Sun, 12 Oct 2014 16:01:25 -0700 In-Reply-To: <1413146950-932-1-git-send-email-mike.linux@btinternet.com> References: <1413146950-932-1-git-send-email-mike.linux@btinternet.com> Content-Type: text/plain; charset="ISO-8859-1" X-Mailer: Evolution 3.10.4-0ubuntu2 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, 2014-10-12 at 21:49 +0100, Mike Roocroft wrote: > Fixed a coding style issue. [] > diff --git a/crypto/gf128mul.c b/crypto/gf128mul.c [] > @@ -97,7 +97,7 @@ > the table above > */ > > -#define xx(p, q) 0x##p##q > +#define xx(p, q) (0x##p##q) > > #define xda_bbe(i) ( \ > (i & 0x80 ? xx(43, 80) : 0) ^ (i & 0x40 ? xx(21, c0) : 0) ^ \ I think that macro is pretty useless and nothing but obfuscation now. The comment above it doesn't seem useful either. How about just removing and replacing the uses like this? --- crypto/gf128mul.c | 27 ++++++++------------------- 1 file changed, 8 insertions(+), 19 deletions(-) diff --git a/crypto/gf128mul.c b/crypto/gf128mul.c index 5276607..90cf17d 100644 --- a/crypto/gf128mul.c +++ b/crypto/gf128mul.c @@ -88,29 +88,18 @@ q(0xf8), q(0xf9), q(0xfa), q(0xfb), q(0xfc), q(0xfd), q(0xfe), q(0xff) \ } -/* Given the value i in 0..255 as the byte overflow when a field element - in GHASH is multiplied by x^8, this function will return the values that - are generated in the lo 16-bit word of the field value by applying the - modular polynomial. The values lo_byte and hi_byte are returned via the - macro xp_fun(lo_byte, hi_byte) so that the values can be assembled into - memory as required by a suitable definition of this macro operating on - the table above -*/ - -#define xx(p, q) 0x##p##q - #define xda_bbe(i) ( \ - (i & 0x80 ? xx(43, 80) : 0) ^ (i & 0x40 ? xx(21, c0) : 0) ^ \ - (i & 0x20 ? xx(10, e0) : 0) ^ (i & 0x10 ? xx(08, 70) : 0) ^ \ - (i & 0x08 ? xx(04, 38) : 0) ^ (i & 0x04 ? xx(02, 1c) : 0) ^ \ - (i & 0x02 ? xx(01, 0e) : 0) ^ (i & 0x01 ? xx(00, 87) : 0) \ + (i & 0x80 ? 0x4380 : 0) ^ (i & 0x40 ? 0x21c0 : 0) ^ \ + (i & 0x20 ? 0x10e0 : 0) ^ (i & 0x10 ? 0x0870 : 0) ^ \ + (i & 0x08 ? 0x0438 : 0) ^ (i & 0x04 ? 0x021c : 0) ^ \ + (i & 0x02 ? 0x010e : 0) ^ (i & 0x01 ? 0x0087 : 0) \ ) #define xda_lle(i) ( \ - (i & 0x80 ? xx(e1, 00) : 0) ^ (i & 0x40 ? xx(70, 80) : 0) ^ \ - (i & 0x20 ? xx(38, 40) : 0) ^ (i & 0x10 ? xx(1c, 20) : 0) ^ \ - (i & 0x08 ? xx(0e, 10) : 0) ^ (i & 0x04 ? xx(07, 08) : 0) ^ \ - (i & 0x02 ? xx(03, 84) : 0) ^ (i & 0x01 ? xx(01, c2) : 0) \ + (i & 0x80 ? 0xe100 : 0) ^ (i & 0x40 ? 0x7080 : 0) ^ \ + (i & 0x20 ? 0x3840 : 0) ^ (i & 0x10 ? 0x1c20 : 0) ^ \ + (i & 0x08 ? 0x0e10 : 0) ^ (i & 0x04 ? 0x0708 : 0) ^ \ + (i & 0x02 ? 0x0384 : 0) ^ (i & 0x01 ? 0x01c2 : 0) \ ) static const u16 gf128mul_table_lle[256] = gf128mul_dat(xda_lle);