From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Date: Mon, 8 Nov 2010 19:26:36 +0000 (-0500)
Subject: xen/irq: Add support to check if IRQ line is shared with other domains.
X-Git-Tag: v3.0-rc1~415^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c7c2c3a28657cfdcef50c02b18ccca3761209e17;p=pandora-kernel.git

xen/irq: Add support to check if IRQ line is shared with other domains.

We do this via the PHYSDEVOP_irq_status_query support hypervisor call.
We will get a positive value if another domain has binded its
PIRQ to the specified GSI (IRQ line).

[v2: Deal with v2.6.37-rc1 rebase fallout]
[v3: Deal with stable/irq.cleanup fallout]
[v4: xen_ignore_irq->xen_test_irq_shared]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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