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From: Steven Rostedt <rostedt@goodmis.org>
To: David Daney <ddaney@caviumnetworks.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>,
	Ingo Molnar <mingo@elte.hu>, Jason Baron <jbaron@redhat.com>,
	rth@redhat.com, "H. Peter Anvin" <hpa@zytor.com>,
	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: Fri, 29 Oct 2010 13:33:02 -0400	[thread overview]
Message-ID: <1288373582.29632.3.camel@gandalf.stny.rr.com> (raw)
In-Reply-To: <4CCB01D1.2050004@caviumnetworks.com>

On Fri, 2010-10-29 at 10:18 -0700, David Daney wrote:

> I hate to continue beating a dead horse, but RTH just committed the GCC 
> patch, and it will be part of GCC-4.5.2 and later.

Great!

> 
> Should this knowledge be builtin to the jump label enabling calculus?

No, because we can't trust versions. We never know what home grown gcc a
kernel developer is using (and what has been backported or not). Thus
the only option is to have a builtin test we can do at compile time to
determine if the bug exists or not and decide then.

Note, I'm currently running my last set of patches through ktest. When
it finishes (presumably with no issues), I'll post a pull request.

-- Steve



  reply	other threads:[~2010-10-29 17:33 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
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 [this message]
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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