linux-kernel - Re: [Xen-devel] [PATCH v2 2/2] x86/xen: allow privcmd hypercalls to be preempted

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Message-ID: <20141218192313.GA19507@laptop.dumpdata.com>
Date:	Thu, 18 Dec 2014 14:23:14 -0500
From:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:	"Luis R. Rodriguez" <mcgrof@...not-panic.com>
Cc:	mingo@...hat.com, peterz@...radead.org, jgross@...e.com,
	"Luis R. Rodriguez" <mcgrof@...e.com>, x86@...nel.org,
	linux-kernel@...r.kernel.org, rostedt@...dmis.org,
	luto@...capital.net, david.vrabel@...rix.com, JBeulich@...e.com,
	hpa@...or.com, masami.hiramatsu.pt@...achi.com,
	xen-devel@...ts.xenproject.org, tglx@...utronix.de,
	Borislav Petkov <bp@...e.de>, bpoirier@...e.de
Subject: Re: [Xen-devel] [PATCH v2 2/2] x86/xen: allow privcmd hypercalls to
 be preempted

> index 0000000..b5a3e98
> --- /dev/null
> +++ b/drivers/xen/preempt.c
> @@ -0,0 +1,17 @@
> +/*
> + * Preemptible hypercalls
> + *
> + * Copyright (C) 2014 Citrix Systems R&D ltd.
> + *
> + * This source code is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License as
> + * published by the Free Software Foundation; either version 2 of the
> + * License, or (at your option) any later version.
> + */
> +
> +#include <xen/xen-ops.h>
> +
> +#ifndef CONFIG_PREEMPT
> +DEFINE_PER_CPU(bool, xen_in_preemptible_hcall);
> +EXPORT_SYMBOL_GPL(xen_in_preemptible_hcall);
> +#endif

Please also add this in the patch:


diff --git a/drivers/xen/preempt.c b/drivers/xen/preempt.c
index b5a3e98..5d773dc 100644
--- a/drivers/xen/preempt.c
+++ b/drivers/xen/preempt.c
@@ -13,5 +13,5 @@
 
 #ifndef CONFIG_PREEMPT
 DEFINE_PER_CPU(bool, xen_in_preemptible_hcall);
-EXPORT_SYMBOL_GPL(xen_in_preemptible_hcall);
+EXPORT_PER_CPU_SYMBOL_GPL(xen_in_preemptible_hcall);
 #endif
--
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