Date: Thu, 10 Aug 2006 08:33:36 -0700 (PDT) From: Kip Macy <kmacy@fsmware.com> To: Markus Trippelsdorf <markus@trippelsdorf.de> Cc: freebsd-fs@FreeBSD.org, Dag-Erling =?iso-8859-1?Q?Sm=F8rgrav?= <des@des.no>, freebsd-current@FreeBSD.org, Pawel Jakub Dawidek <pjd@FreeBSD.org>, freebsd-geom@FreeBSD.org Subject: Re: GJournal (hopefully) final patches. Message-ID: <20060810083206.D27159@demos.bsdclusters.com> In-Reply-To: <20060810135426.GA778@bsd.trippelsdorf.de> References: <20060808195202.GA1564@garage.freebsd.pl> <20060808210211.GA730@bsd.trippelsdorf.de> <20060808214116.GB730@bsd.trippelsdorf.de> <868xlw3e2z.fsf@xps.des.no> <20060810135426.GA778@bsd.trippelsdorf.de>
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> > -fno-strict-aliasing does not solve anything, it just prevents the
> > compiler from telling you about bugs in your code.
>
> Which must be the reason that it is used when building the kernel on AMD64.
> ;-)
Actually, whenever the kernel is compiled with -O2. "Type punning" is
sufficiently uncommon in the kernel proper that it is correctable there.
However, it is pervasive throughout the device drivers.
-Kip
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