From mboxrd@z Thu Jan  1 00:00:00 1970
From: Juergen Gross <juergen.gross@ts.fujitsu.com>
Subject: Re: [PATCH] x86/IRQ: fix create_irq() after
	c/s	24068:6928172f7ded
Date: Fri, 04 Nov 2011 14:01:44 +0100
Message-ID: <4EB3E238.7030205@ts.fujitsu.com>
References: <4EB3E02B020000780005F027@nat28.tlf.novell.com>
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To: Jan Beulich <JBeulich@suse.com>
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On 11/04/2011 12:52 PM, Jan Beulich wrote:
> init_one_irq_desc() must be called with interrupts enabled (as it may
> call functions from the xmalloc() group). Rather than mis-using
> vector_lock to also protect the finding of an unused IRQ, make this
> lockless through using cmpxchg(), and obtain the lock only around the
> actual assignment of the vector.

Works for me (machine coming up again).

Juergen

-- 
Juergen Gross                 Principal Developer Operating Systems
PDG ES&S SWE OS6                       Telephone: +49 (0) 89 3222 2967
Fujitsu Technology Solutions              e-mail: juergen.gross@ts.fujitsu.com
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