linux-kernel - RE: [PATCH 4/6] x86-mce: Add spinlocks to prevent duplicated MCP and CMCI reports.

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Date:	Wed, 9 Jul 2014 20:47:23 +0000
From:	"Luck, Tony" <tony.luck@...el.com>
To:	Havard Skinnemoen <hskinnemoen@...gle.com>,
	Borislav Petkov <bp@...en8.de>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Ewout van Bekkum" <ewout@...gle.com>
Subject: RE: [PATCH 4/6] x86-mce: Add spinlocks to prevent duplicated MCP
 and CMCI reports.

		if (!(flags & MCP_UC) &&
-		    (m.status & (mca_cfg.ser ? MCI_STATUS_S : MCI_STATUS_UC)))
+		    (m.status & (mca_cfg.ser ? MCI_STATUS_S : MCI_STATUS_UC))) {
+			spin_unlock_irqrestore(&mce_banks[i].poll_spinlock,
+					       irq_flags);
 			continue;
+		}

Perhaps move this test for UC up to before you grab the lock?

-Tony
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