From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Yinghai Lu <yinghai@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Rabin Vincent <rabin@rab.in>, lkml <linux-kernel@vger.kernel.org>,
hpa@zytor.com, penberg@cs.helsinki.fi, cl@linux-foundation.org,
linux-arch@vger.kernel.org
Subject: Re: start_kernel(): bug: interrupts were enabled early
Date: Thu, 01 Apr 2010 09:31:27 +1100 [thread overview]
Message-ID: <1270074687.7101.74.camel@pasglop> (raw)
In-Reply-To: <4BB3B4DB.7040904@kernel.org>
On Wed, 2010-03-31 at 13:47 -0700, Yinghai Lu wrote:
> > perhaps the second one isn't needed? Perhaps no architecture
> requires
> > that local interrupts be disabled across the above initialisations?
>
> spin_unlock_irq from arm is different from other archs?
No, it's not, it will enable IRQs and thats illegal to do so early
during boot. We've been over that one again and again, the problem is
that people want to keep using that instead of irqsave/restore because
it's a nano-optimisation on x86... oh well...
Cheers,
Ben.
next prev parent reply other threads:[~2010-03-31 22:32 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20100325194100.GA2364@debian>
2010-03-31 20:40 ` start_kernel(): bug: interrupts were enabled early Andrew Morton
2010-03-31 20:47 ` Yinghai Lu
2010-03-31 20:47 ` Yinghai Lu
2010-03-31 20:52 ` Andrew Morton
2010-03-31 21:12 ` H. Peter Anvin
2010-03-31 21:28 ` Andrew Morton
2010-03-31 22:35 ` Benjamin Herrenschmidt
2010-04-01 16:13 ` Linus Torvalds
2010-04-01 14:27 ` Andrew Morton
2010-04-01 20:12 ` Linus Torvalds
2010-04-02 14:46 ` David Howells
2010-04-02 14:54 ` Linus Torvalds
2010-04-07 19:09 ` Kevin Hilman
2010-04-08 15:55 ` Américo Wang
2010-04-08 15:55 ` Américo Wang
2010-03-31 21:01 ` Matthew Wilcox
2010-03-31 21:05 ` H. Peter Anvin
2010-03-31 21:17 ` Matthew Wilcox
2010-03-31 21:42 ` Christoph Lameter
2010-03-31 21:54 ` Russell King
2010-03-31 21:57 ` H. Peter Anvin
2010-03-31 21:57 ` H. Peter Anvin
2010-03-31 22:30 ` Russell King
2010-03-31 22:37 ` Benjamin Herrenschmidt
2010-03-31 22:49 ` Andrew Morton
2010-04-01 1:17 ` Benjamin Herrenschmidt
2010-03-31 22:26 ` Andrew Morton
2010-04-01 6:26 ` H. Peter Anvin
2010-04-01 3:33 ` Andrew Morton
2010-04-01 6:48 ` Benjamin Herrenschmidt
2010-04-01 11:06 ` David Howells
2010-04-01 15:55 ` Christoph Lameter
2010-04-01 23:00 ` Benjamin Herrenschmidt
2010-04-01 16:15 ` H. Peter Anvin
2010-04-01 16:15 ` H. Peter Anvin
2010-04-01 6:50 ` Benjamin Herrenschmidt
2010-03-31 22:36 ` Benjamin Herrenschmidt
2010-04-01 15:57 ` Christoph Lameter
2010-03-31 21:05 ` Russell King
2010-03-31 21:05 ` Russell King
2010-03-31 21:08 ` H. Peter Anvin
2010-03-31 21:08 ` H. Peter Anvin
2010-03-31 22:58 ` David Howells
2010-04-01 9:41 ` Jamie Lokier
2010-04-01 10:50 ` David Howells
2010-04-01 11:23 ` Matthew Wilcox
2010-03-31 22:31 ` Benjamin Herrenschmidt [this message]
2010-03-31 22:36 ` H. Peter Anvin
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