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Date:      Fri, 13 Nov 2015 13:02:59 -0800
From:      Bryan Drewery <bdrewery@FreeBSD.org>
To:        Randall Stewart <rrs@netflix.com>
Cc:        "Alexander V. Chernikov" <melifaro@freebsd.org>, Randall Ray Stewart <rrs@freebsd.org>, "src-committers@freebsd.org" <src-committers@freebsd.org>, "svn-src-all@freebsd.org" <svn-src-all@freebsd.org>, "svn-src-head@freebsd.org" <svn-src-head@freebsd.org>, Adrian Chadd <adrian@freebsd.org>, imp@freebsd.org
Subject:   Re: svn commit: r290664 - in head: share/man/man9 sys/kern sys/sys
Message-ID:  <56465003.8070709@FreeBSD.org>
In-Reply-To: <CCAE1243-3DC1-4077-BC55-AA6EA7750181@netflix.com>
References:  <201511101449.tAAEnXIi065747@repo.freebsd.org> <1660421447413365@web19h.yandex.ru> <56464A90.2040405@FreeBSD.org> <56464CBA.7060206@FreeBSD.org> <CCAE1243-3DC1-4077-BC55-AA6EA7750181@netflix.com>

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On 11/13/2015 1:00 PM, Randall Stewart wrote:
> Bryan:
>=20
> This looks like a decent thing to do..
>=20
> Still wondering why changing the callout.h header file would not have c=
aused
> things to recompile to pick up the new argument..
>=20
> We can do it this way though it looks fine.
>=20
> You want to commit it or I?

Well your change is totally safe for compiling. It's just not KBI
backwards compat for older modules. This is not typically a problem but
I think in this case it is worth doing to avoid random data coming into
the 'drain' argument if loading an older module.

I'll do a test build and commit it. Perhaps this is what was leading to
Alexander's panics.

I haven't analyzed the return value issue at all.


--=20
Regards,
Bryan Drewery


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