linux-kernel - [PATCH] x86/vsmp: Fix linker error when CONFIG_PROC

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Message-Id: <1339688588-12674-1-git-send-email-ido@wizery.com>
Date:	Thu, 14 Jun 2012 18:43:08 +0300
From:	Ido Yariv <ido@...ery.com>
To:	mingo@...nel.org, hpa@...or.com, tglx@...utronix.de,
	linux-tip-commits@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:	wfg@...ux.intel.com, shai@...lemp.com, Ido Yariv <ido@...ery.com>
Subject: [PATCH] x86/vsmp: Fix linker error when CONFIG_PROC_FS is not set

set_vsmp_pv_ops() references no_irq_affinity which is undeclared if
CONFIG_PROC_FS isn't set. Fix this by adding an ifdef around this
variable's access.

Reported-by: Fengguang Wu <wfg@...ux.intel.com>
Signed-off-by: Ido Yariv <ido@...ery.com>
Acked-by: Shai Fultheim <shai@...lemp.com>
---
 arch/x86/kernel/vsmp_64.c |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/x86/kernel/vsmp_64.c b/arch/x86/kernel/vsmp_64.c
index 6b96a73..3f0285a 100644
--- a/arch/x86/kernel/vsmp_64.c
+++ b/arch/x86/kernel/vsmp_64.c
@@ -101,7 +101,10 @@ static void __init set_vsmp_pv_ops(void)
 #ifdef CONFIG_SMP
 	if (cap & ctl & BIT(8)) {
 		ctl &= ~BIT(8);
+#ifdef CONFIG_PROC_FS
+		/* Don't let users change irq affinity via procfs */
 		no_irq_affinity = 1;
+#endif
 	}
 #endif
 
-- 
1.7.10.2

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