From: Andreas Schwab <schwab@linux-m68k.org>
To: "Jan Beulich" <JBeulich@novell.com>
Cc: "Ingo Molnar" <mingo@elte.hu>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Nick Piggin" <npiggin@suse.de>, <hpa@zytor.com>,
<linux-kernel@vger.kernel.org>
Subject: Re: uses of cmpxchg/xadd in spinlock.h and rwsem.h vs. CONFIG_M386
Date: Tue, 12 May 2009 18:18:37 +0200 [thread overview]
Message-ID: <m2vdo6l2g2.fsf@igel.home> (raw)
In-Reply-To: <4A09AF8402000078000007DC@vpn.id2.novell.com> (Jan Beulich's message of "Tue, 12 May 2009 16:19:00 +0100")
"Jan Beulich" <JBeulich@novell.com> writes:
> While looking at a completely different issue I happened to grep for uses of
> xadd, and it would appear to me that there got uses added that would make
> a M386-configured SMP kernel die on an actual i386.
>
> Oh, for the rwsem case I see - it would use the RWSEM_GENERIC_SPINLOCK case
> when selecting M386. But I see nothing similar for the ticket spinlocks - am
> I overlooking something?
This came up before, see
<http://marc.info/?l=linux-kernel&m=123141659309208&w=2>.
Andreas.
--
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5
"And now for something completely different."
prev parent reply other threads:[~2009-05-12 16:18 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-12 15:19 uses of cmpxchg/xadd in spinlock.h and rwsem.h vs. CONFIG_M386 Jan Beulich
2009-05-12 15:37 ` Nick Piggin
2009-05-12 15:57 ` Alan Cox
2009-05-12 16:02 ` Peter Zijlstra
2009-05-12 15:51 ` H. Peter Anvin
2009-05-12 15:57 ` Nick Piggin
2009-05-12 16:04 ` H. Peter Anvin
2009-05-12 16:16 ` Jan Beulich
2009-05-12 16:18 ` Andreas Schwab [this message]
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