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From: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= <des@des.no>
To: Pawel Jakub Dawidek <pjd@FreeBSD.org>
References: <201206042134.q54LYoVJ067685@svn.freebsd.org>
	<20120605074741.GA1391@garage.freebsd.pl>
Date: Tue, 05 Jun 2012 15:10:06 +0200
In-Reply-To: <20120605074741.GA1391@garage.freebsd.pl> (Pawel Jakub Dawidek's
	message of "Tue, 5 Jun 2012 09:47:42 +0200")
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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
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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