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Date:      Fri, 26 Feb 2010 08:28:54 -0500
From:      Ed Maste <emaste@freebsd.org>
To:        Kostik Belousov <kostikbel@gmail.com>
Cc:        src-committers@freebsd.org, delphij@gmail.com, svn-src-all@freebsd.org, attilio@freebsd.org, svn-src-head@freebsd.org, "M. Warner Losh" <imp@bsdimp.com>
Subject:   Re: svn commit: r204309 - in head/sys: amd64/amd64 amd64/isa conf i386/bios i386/cpufreq i386/i386 i386/isa i386/xen isa modules/bios/smbios modules/bios/vpd modules/cpufreq pc98/pc98 x86 x86/bios x86/...
Message-ID:  <20100226132854.GA25722@sandvine.com>
In-Reply-To: <20100226104936.GD2489@deviant.kiev.zoral.com.ua>
References:  <3bbf2fe11002251548y773c661gd4946f371bcbbd6f@mail.gmail.com> <a78074951002251708x52435f63g8d22b371f54cd2f7@mail.gmail.com> <3bbf2fe11002251732t35179d9ar3c3f39aafe75d5c2@mail.gmail.com> <20100225.185653.364718154403387259.imp@bsdimp.com> <20100226104936.GD2489@deviant.kiev.zoral.com.ua>

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[ About the i386/amd64/pc98 -> x86 merge ]

> > : I think there have been already MFCed patches doing headers movements
> > : in the past.
> > 
> > We've tried to keep the KPI upwardly compatible.  If files move, then
> > old code will potentially break.
> 
> Yes, but there is very non-trivial cost of not merging this.
> It makes testing in HEAD of other patches less valuable for merges,
> and merges itself becomes more time-consuming and risking.
> 
> Fortunately, I do not no dri, but I know that maintaining patches
> both for 7 and 8/HEAD of dri is a hell.

For headers on older branches we can just leave backwards compatibility
stubs in the i386, amd64 and pc98 directories that include the header
from the new x86 directory.

-Ed



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