Date: Thu, 25 Feb 2010 18:56:53 -0700 (MST) From: "M. Warner Losh" <imp@bsdimp.com> To: attilio@FreeBSD.org Cc: svn-src-head@FreeBSD.org, svn-src-all@FreeBSD.org, src-committers@FreeBSD.org, delphij@gmail.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: <20100225.185653.364718154403387259.imp@bsdimp.com> In-Reply-To: <3bbf2fe11002251732t35179d9ar3c3f39aafe75d5c2@mail.gmail.com> References: <3bbf2fe11002251548y773c661gd4946f371bcbbd6f@mail.gmail.com> <a78074951002251708x52435f63g8d22b371f54cd2f7@mail.gmail.com> <3bbf2fe11002251732t35179d9ar3c3f39aafe75d5c2@mail.gmail.com>
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In message: <3bbf2fe11002251732t35179d9ar3c3f39aafe75d5c2@mail.gmail.co=
m>
Attilio Rao <attilio@FreeBSD.org> writes:
: 2010/2/26 Xin LI <delphij@gmail.com>:
: > On Thu, Feb 25, 2010 at 3:48 PM, Attilio Rao <attilio@freebsd.org> =
wrote:
: >> 2010/2/26 M. Warner Losh <imp@bsdimp.com>:
: >>> In message: <201002251413.o1PEDdKV033584@svn.freebsd.org>
: >>> =A0 =A0 =A0 =A0 =A0 =A0Attilio Rao <attilio@FreeBSD.org> writes:
: >>> : Author: attilio
: >>> : Date: Thu Feb 25 14:13:39 2010
: >>> : New Revision: 204309
: >>> : URL: http://svn.freebsd.org/changeset/base/204309
: >>> :
: >>> : Log:
: >>> : =A0 Introduce the new kernel sub-tree x86 which should contain =
all the code
: >>> : =A0 shared and generalized between our current amd64, i386 and =
pc98.
: >>> :
: >>> : =A0 This is just an initial step that should lead to a more com=
plete effort.
: >>> : =A0 For the moment, a very simple porting of cpufreq modules, B=
IOS calls and
: >>> : =A0 the whole MD specific ISA bus part is added to the sub-tree=
but ideally
: >>> : =A0 a lot of code might be added and more shared support should=
grow.
: >>>
: >>> Cool!
: >>>
: >>> : =A0 Sponsored by: =A0 =A0 =A0 Sandvine Incorporated
: >>> : =A0 Reviewed by: =A0 =A0 =A0 =A0emaste, kib, jhb, imp
: >>> : =A0 Discussed on: =A0 =A0 =A0 arch
: >>> : =A0 MFC: =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A03 weeks
: >>>
: >>> Is this really wise? =A0Are these changes KPI neutral?
: >>
: >> I don't think there are (still) KPI changes.
: >> Which one are you referring to?
: >
: > I think Warner means that there will be some header files to change=
: > their location, making certain (I doubt there is any but just in ca=
se)
: > kernel modules maintained by third party to break (technically thes=
e
: > are not part of KPI but something that _could_ make third party
: > developers unhappy I guess).
: =
: Yes but what is already compiled (thirdy-part modules included) will
: keep working without a glance.
Yes, but modules can't be recompiled. That's why I said KPI rather
than KBI.
: 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.
Warner
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