From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dmitry Torokhov Subject: Re: [PATCH] Input: bcm5974.c initialize raw_w, raw_x and raw_y before it get used Date: Sun, 13 Sep 2009 21:37:14 -0700 Message-ID: <20090914043714.GB11854@core.coreip.homeip.net> References: <1252775770.3687.7.camel@ht.satnam> <4AAC2DBE.9040303@bitmath.org> <1252830690.3440.5.camel@ht.satnam> <4AACD9E9.4000702@bitmath.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mail-pz0-f184.google.com ([209.85.222.184]:45371 "EHLO mail-pz0-f184.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1749667AbZINEhQ (ORCPT ); Mon, 14 Sep 2009 00:37:16 -0400 Received: by pzk14 with SMTP id 14so2322380pzk.1 for ; Sun, 13 Sep 2009 21:37:20 -0700 (PDT) Content-Disposition: inline In-Reply-To: <4AACD9E9.4000702@bitmath.org> Sender: linux-input-owner@vger.kernel.org List-Id: linux-input@vger.kernel.org To: Henrik Rydberg Cc: Jaswinder Singh Rajput , linux-input@vger.kernel.org On Sun, Sep 13, 2009 at 01:39:21PM +0200, Henrik Rydberg wrote: > Jaswinder Singh Rajput wrote: > > On Sun, 2009-09-13 at 01:24 +0200, Henrik Rydberg wrote: > >> Jaswinder Singh Rajput wrote: > >>> raw_w, raw_x and raw_y is used uninitialized for !raw_n > >> Thanks for the heads up, but actually not, since !raw_n also implies > >> !(ptest > PRESSURE_LOW). > >> > > > > Then can we move 'if (ptest > PRESSURE_LOW && origin)' stuff to 'if > > (raw_n)'. If not then my patch is correct. > > Yes, that's it, thanks. So this patch ought to solve the warning cleanly: > Yes, I like this one much better, applied. > >> > >> > >> I wonder how many cpu cycles in the world are spent making compilers happy. > >> > > > > It is not compiler mistake it is programming/logic mistakes. We should > > be thankful to compiler to pointing mistakes made by us. > Except in cases when the compiler is wrong... > The uninitialized-variable warnings have certainly proved their value many times > over. I was merely reflecting over the fact that the enclosing space of all such > errors could be made smaller by deduction at compile time. > -- Dmitry