linux-kernel - [PATCH 1/2] UV: NMI: insert per_cpu accessor function on uv_hub

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Message-Id: <20150430132914.28122.11850.sendpatchset@gulag2.americas.sgi.com>
Date:	Thu, 30 Apr 2015 08:29:14 -0500 (CDT)
From:	George Beshers <gbeshers@....com>
To:	George Beshers <gbeshers@....com>, Mike Travis <travis@....com>,
	linux-kernel@...r.kernel.org, Alex Thorlton <athorlton@....com>,
	Dimitri Sivanich <sivanich@....com>,
	Ingo Molnar <mingo@...hat.com>, Hedi Berriche <hedi@....com>,
	Russ Anderson <rja@....com>
Cc:	George Beshers <gbeshers@....com>
Subject: [PATCH 1/2] UV: NMI: insert per_cpu accessor function on uv_hub_nmi.

UV: NMI: insert this_cpu_read accessor function on uv_hub_nmi.

UV NMI was accidently broken by this patch.

    commit e16321709c8270f9803bbfdb51e5e02235078c7f
    Author: Christoph Lameter <cl@...ux.com>
    Date:   Sun Aug 17 12:30:41 2014 -0500

This patch insert this_cpu_read() on when accessing the
PER_CPU uv_cpu_nmi variable.

Signed-off-by: George Beshers <gbeshers@....com>
Acked-by: Mike Travis <travis@....com>
Cc: Russ Anderson <rja@....com>
Cc: Dimitri Sivanich <sivanich@....com>
Cc: Hedi Berriche <hedi@....com>
Cc: Alex Thorlton <athorlton@....com>
Cc: Christoph Lameter <cl@...ux.com>

diff --git a/arch/x86/include/asm/uv/uv_hub.h b/arch/x86/include/asm/uv/uv_hub.h
index a00ad8f..ea707478 100644
--- a/arch/x86/include/asm/uv/uv_hub.h
+++ b/arch/x86/include/asm/uv/uv_hub.h
@@ -609,7 +609,7 @@ struct uv_cpu_nmi_s {
 
 DECLARE_PER_CPU(struct uv_cpu_nmi_s, uv_cpu_nmi);
 
-#define uv_hub_nmi			(uv_cpu_nmi.hub)
+#define uv_hub_nmi			this_cpu_read(uv_cpu_nmi.hub)
 #define uv_cpu_nmi_per(cpu)		(per_cpu(uv_cpu_nmi, cpu))
 #define uv_hub_nmi_per(cpu)		(uv_cpu_nmi_per(cpu).hub)
 
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