linux-kernel - Re: [musl] Re: [RFC PATCH] x86/vdso/32: Add AT

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Message-ID: <CA+55aFwuJUUq9maeDh_WL8HtaA0Sqit0eqGYgk4GwpQboJEL7Q@mail.gmail.com>
Date:	Fri, 11 Mar 2016 11:44:51 -0800
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Andy Lutomirski <luto@...capital.net>
Cc:	Ingo Molnar <mingo@...nel.org>, Rich Felker <dalias@...c.org>,
	Andy Lutomirski <luto@...nel.org>,
	"the arch/x86 maintainers" <x86@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Borislav Petkov <bp@...en8.de>,
	"musl@...ts.openwall.com" <musl@...ts.openwall.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: [musl] Re: [RFC PATCH] x86/vdso/32: Add AT_SYSINFO cancellation helpers

On Fri, Mar 11, 2016 at 11:39 AM, Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
>
>  "An implementation may also mark other functions not specified in the
> standard as cancellation  points"

.. but that was from the Linux man-page. The open group has

 "An implementation shall not introduce cancellation points into any
other functions specified in this volume of POSIX.1-2008"

So yeah, it looks like there would need to be some way to filter things.

Oh well.

           Linus