From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Date: Tue, 16 Apr 2013 18:33:20 +0000 (-0400)
Subject: xen/spinlock:  Check against default value of -1 for IRQ line.
X-Git-Tag: omap-for-v3.10/dt-fixes-for-merge-window~147^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cb9c6f15f318aa3aeb62fe525aa5c6dcf6eee159;p=pandora-kernel.git

xen/spinlock:  Check against default value of -1 for IRQ line.

The default (uninitialized) value of the IRQ line is -1.
Check if we already have allocated an spinlock interrupt line
and if somebody is trying to do it again. Also set it to -1
when we offline the CPU.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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