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Message-ID: <CAMzpN2j2F9gQCRGmzVb0LjQT9mmU9m=HRG2Vbf-g79+i57dvdg@mail.gmail.com>
Date: Tue, 12 Jul 2016 07:57:31 -0400
From: Brian Gerst <brgerst@...il.com>
To: Andy Lutomirski <luto@...nel.org>
Cc: "the arch/x86 maintainers" <x86@...nel.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, linux-arch <linux-arch@...r.kernel.org>,
Borislav Petkov <bp@...en8.de>, Nadav Amit <nadav.amit@...il.com>, Kees Cook <keescook@...omium.org>,
"kernel-hardening@...ts.openwall.com" <kernel-hardening@...ts.openwall.com>,
Linus Torvalds <torvalds@...ux-foundation.org>, Josh Poimboeuf <jpoimboe@...hat.com>,
Jann Horn <jann@...jh.net>, Heiko Carstens <heiko.carstens@...ibm.com>,
Richard Henderson <rth@...ddle.net>, Ivan Kokshaysky <ink@...assic.park.msu.ru>,
Matt Turner <mattst88@...il.com>, Tony Luck <tony.luck@...el.com>,
Fenghua Yu <fenghua.yu@...el.com>, Michal Simek <monstr@...str.eu>,
Benjamin Herrenschmidt <benh@...nel.crashing.org>, Paul Mackerras <paulus@...ba.org>,
Michael Ellerman <mpe@...erman.id.au>, Yoshinori Sato <ysato@...rs.sourceforge.jp>,
Rich Felker <dalias@...c.org>, "David S. Miller" <davem@...emloft.net>,
Chris Metcalf <cmetcalf@...lanox.com>, Peter Zijlstra <peterz@...radead.org>,
Borislav Petkov <bp@...e.de>, Dmitry Safonov <dsafonov@...tuozzo.com>,
Andrew Morton <akpm@...ux-foundation.org>, linux-alpha@...r.kernel.org,
linux-ia64@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
linux-sh@...r.kernel.org, sparclinux@...r.kernel.org
Subject: Re: [PATCH v5 18/32] signal: Consolidate {TS,TLF}_RESTORE_SIGMASK code
On Mon, Jul 11, 2016 at 4:53 PM, Andy Lutomirski <luto@...nel.org> wrote:
> In general, there's no need for the "restore sigmask" flag to live in
> ti->flags. alpha, ia64, microblaze, powerpc, sh, sparc (64-bit only),
> tile, and x86 use essentially identical alternative implementations,
> placing the flag in ti->status.
>
> Replace those optimized implementations with an equally good common
> implementation that stores it in a bitfield in struct task_struct
> and drop the custom implementations.
>
> Additional architectures can opt in by removing their
> TIF_RESTORE_SIGMASK defines.
There is a small typo in the subject, should be "signal: Consolidate
{TS,TIF}_RESTORE_SIGMASK code"
--
Brian Gerst
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