From: "H. Peter Anvin" <hpa@zytor.com>
To: Andi Kleen <ak@suse.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
"Siddha, Suresh B" <suresh.b.siddha@intel.com>,
linux-kernel@vger.kernel.org, mingo@elte.hu, tglx@linutronix.de,
akpm@linux-foundation.org
Subject: Re: [patch] x86: fix taking DNA during 64bit sigreturn
Date: Mon, 12 Nov 2007 16:11:34 -0800 [thread overview]
Message-ID: <4738EBB6.7060605@zytor.com> (raw)
In-Reply-To: <200711122216.40663.ak@suse.de>
Andi Kleen wrote:
>> The *real* fix for this is almost certainly to just get rid of the 64-bit
>> code entirely, and use the 32-bit code as the base for one single unified
>> setup.
>
> That would likely break the ABI. x86-64 ABI is completely different here --
> no ibcs, just pure x86 ISA.
>
Different ABIs clearly have to be handled, but I don't think that is a
huge deal. The i387 code overall (not just asm/i387.h) is very
different, though, and I find it unlikely that a properly unified code
is going to be ready and working in the 2.6.24 timeframe. I'm exploring
if a partial merge with high confidence level is feasible; either way, a
proper merge for 2.6.25 is probably the right thing.
-hpa
next prev parent reply other threads:[~2007-11-13 0:12 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-11 19:27 [patch] x86: fix taking DNA during 64bit sigreturn Siddha, Suresh B
2007-11-12 19:08 ` Linus Torvalds
2007-11-12 19:33 ` H. Peter Anvin
2007-11-12 21:16 ` Andi Kleen
2007-11-13 0:11 ` H. Peter Anvin [this message]
2007-11-13 0:43 ` Andi Kleen
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