Message-ID: <1428794717.18187.174.camel@kernel.crashing.org>
Subject: Re: Remove execution domain support
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Richard Weinberger <richard@nod.at>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
        "linux-arch@vger.kernel.org" <linux-arch@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Richard Henderson <rth@twiddle.net>,
        Ivan Kokshaysky <ink@jurassic.park.msu.ru>,
        Matt Turner <mattst88@gmail.com>, Vineet Gupta <vgupta@synopsys.com>,
        Russell King - ARM Linux <linux@arm.linux.org.uk>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will.deacon@arm.com>, hskinnemoen@gmail.com,
        Hans-Christian Egtvedt <egtvedt@samfundet.no>,
        Miao Steven <realmz6@gmail.com>, Mark Salter <msalter@redhat.com>,
        "JACQUIOT-XID, Aurelien" <a-jacquiot@ti.com>,
        Mikael Starvik <starvik@axis.com>,
        Jesper Nilsson <jesper.nilsson@axis.com>,
        David Howells <dhowells@redhat.com>, Richard Kuo <rkuo@codeaurora.org>,
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        Geert Uytterhoeven <geert@linux-m68k.org>,
        James Hogan <james.hogan@imgtec.com>, Michal Simek <monstr@monstr.eu>,
        Ralf Baechle <ralf@linux-mips.org>, Ley Foon Tan <lftan@altera.com>,
        Jonas Bonn <jonas@southpole.se>,
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        Michael Ellerman <mpe@ellerman.id.au>,
        Martin Schwidefsky <schwidefsky@de.ibm.com>,
        Heiko Carstens <heiko.carstens@de.ibm.com>, liqin.linux@gmail.com,
        Lennox Wu <lennox.wu@gmail.com>, David Miller <davem@davemloft.net>,
        cmetcalf@ezchip.com, Jeff Dike <jdike@addtoit.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Oleg Nesterov <oleg@redhat.com>, Christoph Hellwig <hch@infradead.org>,
        Al Viro <viro@zeniv.linux.org.uk>
Date: Sun, 12 Apr 2015 09:25:17 +1000
In-Reply-To: <55298E4F.50502@nod.at>
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On Sat, 2015-04-11 at 23:12 +0200, Richard Weinberger wrote:
> Am 11.04.2015 um 22:52 schrieb Linus Torvalds:
> > On Sat, Apr 11, 2015 at 1:47 PM, Richard Weinberger <richard@nod.at> wrote:
> >>
> >> The removal will make architecutre specific signal handling easier
> >> and there is no need to keep execuction domains as this feature is
> >> obviously incomplete and abandoned
> > 
> > Ack. The whole exec domain made some code code pretty inscrutable.
> > 
> > So I'd certainly be willing to pull this during the 4.1 merge window
> > if nobody complains.
> > 
> > Anybody?
> 
> It would be great to have an Ack from sparc folks.
> I had to recalculate the values of their TI_* constants
> and I don't have a sparc box to test it.

That's what qemu is for :-)

> Using asm-offsets.c for that seems to be impossible on sparc
> as sparc's asm-offsets.c depends on sched.h which depends again
> on thread_info.h...
> Resolving this circular dependency without the ability to run-time
> test my changes was too risky for me.
> 
> Thanks,
> //richard
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