From: David Daney <ddaney@caviumnetworks.com>
To: Jason Baron <jbaron@redhat.com>, rth@redhat.com
Cc: "H. Peter Anvin" <hpa@zytor.com>,
rostedt@goodmis.org, mingo@elte.hu, mathieu.desnoyers@polymtl.ca,
tglx@linutronix.de, andi@firstfloor.org, roland@redhat.com,
masami.hiramatsu.pt@hitachi.com, fweisbec@gmail.com,
avi@redhat.com, davem@davemloft.net, vgoyal@redhat.com,
sam@ravnborg.org, tony@bakeyournoodle.com, dsd@laptop.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/2] jump label: disable due to compiler bug
Date: Thu, 28 Oct 2010 11:55:32 -0700 [thread overview]
Message-ID: <4CC9C724.3020004@caviumnetworks.com> (raw)
In-Reply-To: <20101028141757.GA2875@redhat.com>
On 10/28/2010 07:17 AM, Jason Baron wrote:
> On Wed, Oct 27, 2010 at 03:21:55PM -0700, H. Peter Anvin wrote:
>> Could you detail the bug, please? static_cpu_has() also uses asm goto.
>>
>
> It seems that gcc can leave the stack in an inconsistent state.
>
> I only saw this in the 'jmp' enabled case, I'm not sure if it can occur in the
> straight-line code path as well.
>
Jason,
Were you going to file a GCC bug on this issue? Someone should.
It would be a shame to have the problem persist due to lack of awareness
by the GCC developers.
David Daney
next prev parent reply other threads:[~2010-10-28 18:55 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-27 21:07 [PATCH 0/2] jump label updates Jason Baron
2010-10-27 21:07 ` [PATCH 1/2] move arch_init_ideal_nop5 later Jason Baron
2010-10-27 22:24 ` H. Peter Anvin
2010-10-28 2:11 ` Steven Rostedt
2010-10-28 2:59 ` H. Peter Anvin
2010-10-27 21:07 ` [PATCH 2/2] jump label: disable due to compiler bug Jason Baron
2010-10-27 22:21 ` H. Peter Anvin
2010-10-28 14:17 ` Jason Baron, rth
2010-10-28 18:55 ` David Daney [this message]
2010-10-28 20:11 ` Jason Baron
2010-10-29 6:34 ` Ingo Molnar
2010-10-29 12:18 ` Steven Rostedt
2010-10-29 12:22 ` Ingo Molnar
2010-10-29 12:46 ` Steven Rostedt
2010-10-29 13:10 ` Ingo Molnar
2010-10-29 13:35 ` Mathieu Desnoyers
2010-10-29 16:18 ` Steven Rostedt
2010-10-29 17:18 ` David Daney
2010-10-29 17:33 ` Steven Rostedt
2010-10-29 17:48 ` David Daney
2010-10-29 18:03 ` Steven Rostedt
2010-10-29 18:13 ` Richard Henderson
2010-10-29 18:25 ` Steven Rostedt
2010-10-29 20:15 ` H. Peter Anvin
2010-10-29 20:42 ` Mathieu Desnoyers
2010-10-29 20:47 ` Steven Rostedt
2010-10-29 20:51 ` H. Peter Anvin
2010-10-29 20:58 ` Steven Rostedt
2010-10-30 7:47 ` Andi Kleen
2010-10-30 14:00 ` Steven Rostedt
2010-10-29 20:05 ` Mathieu Desnoyers
2010-10-29 20:44 ` Steven Rostedt
2010-10-29 15:59 ` Richard Henderson
2010-10-27 21:15 ` [PATCH 0/2] jump label updates David Miller
2010-10-28 1:33 ` Steven Rostedt
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