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Date:      Tue, 05 Jun 2012 15:10:06 +0200
From:      =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= <des@des.no>
To:        Pawel Jakub Dawidek <pjd@FreeBSD.org>
Cc:        svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org, "Andrey A. Chernov" <ache@FreeBSD.org>, freebsd-arch@FreeBSD.org
Subject:   Re: svn commit: r236582 - head/lib/libc/stdlib
Message-ID:  <86txypvr9t.fsf@ds4.des.no>
In-Reply-To: <20120605074741.GA1391@garage.freebsd.pl> (Pawel Jakub Dawidek's message of "Tue, 5 Jun 2012 09:47:42 %2B0200")
References:  <201206042134.q54LYoVJ067685@svn.freebsd.org> <20120605074741.GA1391@garage.freebsd.pl>

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Pawel Jakub Dawidek <pjd@FreeBSD.org> writes:
> Very interesting. However free(3) is always successful. Maybe we need
> more context here, but the sentence above might talk about functions
> that can either succeed or fail and such functions do set errno on
> failure, but we don't know what they do to errno on success - they
> sometimes interact with the errno, free(3) never does.

Even if free() itself never fails, it might have side effects such as
unmapping a slab, logging a KTR event etc. which can modify errno.

DES
--=20
Dag-Erling Sm=C3=B8rgrav - des@des.no



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