Date: Thu, 24 May 2018 08:57:46 -0700 From: Matthew Macy <mmacy@freebsd.org> To: Warner Losh <imp@bsdimp.com> Cc: Michael Tuexen <Michael.Tuexen@macmic.franken.de>, Gleb Smirnoff <glebius@freebsd.org>, src-committers <src-committers@freebsd.org>, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r333860 - head/sys/kern Message-ID: <CAPrugNp_dkqOGOVybkQovhZgGdqJzc5Qf3Wds3DT6vWJSQSBaQ@mail.gmail.com> In-Reply-To: <CANCZdfo1Ejie6-6bLx_A57UzwNU1kcpFC5-wxxH_HOwNLupOUg@mail.gmail.com> References: <201805190510.w4J5AqfS054367@repo.freebsd.org> <20180523222743.GU71675@FreeBSD.org> <CAPrugNpKxEVx%2Bg0D6qUwq=yw_W-QeuntupwAjteK1yALkJktag@mail.gmail.com> <20180523225729.GV71675@FreeBSD.org> <CAPrugNpsiYQ1MKkgGbkwPEeTcsTCdD_u5GAvYpMJKHzeSbCL=w@mail.gmail.com> <20180524044252.GW71675@FreeBSD.org> <CAPrugNoVPCbB0qTY=Z1dwCZ%2BbCbVbA1d5b0-tw5qaPxWRK0q8g@mail.gmail.com> <5B9EE208-384F-44AD-9B47-059D77FE9B34@macmic.franken.de> <CAPrugNooA9Jfx5=h8fYb5%2BKPUOjSOD_NR8QX=bBkVKCAu=96-A@mail.gmail.com> <CANCZdfo1Ejie6-6bLx_A57UzwNU1kcpFC5-wxxH_HOwNLupOUg@mail.gmail.com>
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On Thu, May 24, 2018 at 8:54 AM, Warner Losh <imp@bsdimp.com> wrote: > > > On Thu, May 24, 2018 at 12:36 AM, Matthew Macy <mmacy@freebsd.org> wrote: >> >> On Wed, May 23, 2018 at 11:35 PM, Michael Tuexen >> <Michael.Tuexen@macmic.franken.de> wrote: >> >> On 24. May 2018, at 06:51, Matthew Macy <mmacy@freebsd.org> wrote: >> >> >> >> Warnings find bugs PERIOD. Although most are not useful, I've found >> > Some warnings indicate bugs, some warnings are just wrong. If you >> > have a "may be used uninitialized" warning being a false positive, you >> > may silences the warning by just set it to zero in the declaration and >> > you silence it. Other compilers might then correctly report an >> > assignment without affect... >> >> I have yet to see a double assignment be flagged as assignment without >> effect. If it _does_ occur then we have to disable the warning on the >> compiler that we have less faith in. > > > Coverity does exactly that. :-(
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