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Date:      Tue, 3 Sep 2019 10:20:35 -0400
From:      Shawn Webb <shawn.webb@hardenedbsd.org>
To:        Brooks Davis <brooks@freebsd.org>
Cc:        Mateusz Guzik <mjg@FreeBSD.org>, src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org
Subject:   Re: svn commit: r351729 - in head: lib/libc/gen lib/libc/sys sys/compat/freebsd32 sys/kern sys/sys
Message-ID:  <20190903142035.w7tuqow4impv6bkx@mutt-hbsd>
In-Reply-To: <20190903114740.gbzkeffdce3mkee2@mutt-hbsd>
References:  <201909030416.x834GVwk004191@repo.freebsd.org> <20190903113505.ckbx5i34onmin557@mutt-hbsd> <20190903114523.GA68094@spindle.one-eyed-alien.net> <20190903114740.gbzkeffdce3mkee2@mutt-hbsd>

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On Tue, Sep 03, 2019 at 07:47:40AM -0400, Shawn Webb wrote:
> On Tue, Sep 03, 2019 at 11:45:23AM +0000, Brooks Davis wrote:
> > On Tue, Sep 03, 2019 at 07:35:05AM -0400, Shawn Webb wrote:
> > > Hey Mateusz,
> > >=20
> > > On Tue, Sep 03, 2019 at 04:16:31AM +0000, Mateusz Guzik wrote:
> > > > Author: mjg
> > > > Date: Tue Sep  3 04:16:30 2019
> > > > New Revision: 351729
> > > > URL: https://svnweb.freebsd.org/changeset/base/351729
> > > >=20
> > > > Log:
> > > >   Add sysctlbyname system call
> > > >  =20
> > > >   Previously userspace would issue one syscall to resolve the sysct=
l and then
> > > >   another one to actually use it. Do it all in one trip.
> > > >  =20
> > > >   Fallback is provided in case newer libc happens to be running on =
an older
> > > >   kernel.
> > > >  =20
> > > >   Submitted by:	Pawel Biernacki
> > > >   Reported by:	kib, brooks
> > > >   Differential Revision:	https://reviews.freebsd.org/D17282
> > > >=20
> > > > Modified:
> > > ... snip ...
> > > >   head/sys/sys/param.h
> > >=20
> > > ... snip ...
> > >=20
> > > >=20
> > > > Modified: head/sys/sys/param.h
> > > > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D
> > > > --- head/sys/sys/param.h	Mon Sep  2 21:57:57 2019	(r351728)
> > > > +++ head/sys/sys/param.h	Tue Sep  3 04:16:30 2019	(r351729)
> > > > @@ -60,7 +60,7 @@
> > > >   *		in the range 5 to 9.
> > > >   */
> > > >  #undef __FreeBSD_version
> > > > -#define __FreeBSD_version 1300044	/* Master, propagated to newvers=
 */
> > > > +#define __FreeBSD_version 1300045	/* Master, propagated to newvers=
 */
> > >=20
> > > To an outsider, it seems that __FreeBSD_version tends to be bumped in
> > > a separate commit. Am I remembering that right?
> >=20
> > It should be bumped in the same commit, but people forget or the bump
> > they have in their review turns into a no-op because someone else does a
> > bump in the interim (the latter has bit me several times).
>=20
> Interesting. Thanks for the clarification!

One thought for making the version bump a seperate commit is if the
original commit needed to be reverted, the commit can be reverted
wholesale (well, from the perspective of __FreeBSD_version) without
worry of accidentally decrementing the version number to a prior
value.

That's my "need-more-caffeine" verbose way of saying "separating the
version bump from the actual work allows for easier maintenance of the
version number, helping ensure an always-increasing number."

Sorry if I sound dry here. My ten-month-old puppy is tiring me out way
faster than I can tire him out.

Thanks,

--=20
Shawn Webb
Cofounder / Security Engineer
HardenedBSD

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