linux-kernel - [PATCH 5.10 075/199] x86/xen: fix nopvspin build error

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Date:   Mon, 25 Jan 2021 19:38:17 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Randy Dunlap <rdunlap@...radead.org>,
        Juergen Gross <jgross@...e.com>,
        David Woodhouse <dwmw@...zon.co.uk>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.10 075/199] x86/xen: fix nopvspin build error

From: Randy Dunlap <rdunlap@...radead.org>

[ Upstream commit bd9dcef67ffcae2de49e319fba349df76472fd10 ]

Fix build error in x86/xen/ when PARAVIRT_SPINLOCKS is not enabled.

Fixes this build error:

../arch/x86/xen/smp_hvm.c: In function ‘xen_hvm_smp_init’:
../arch/x86/xen/smp_hvm.c:77:3: error: ‘nopvspin’ undeclared (first use in this function)
   nopvspin = true;

Fixes: 3d7746bea925 ("x86/xen: Fix xen_hvm_smp_init() when vector callback not available")
Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
Reviewed-by: Juergen Gross <jgross@...e.com>
Cc: David Woodhouse <dwmw@...zon.co.uk>
Cc: Juergen Gross <jgross@...e.com>
Link: https://lore.kernel.org/r/20210115191123.27572-1-rdunlap@infradead.org
Signed-off-by: Juergen Gross <jgross@...e.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/x86/xen/smp_hvm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/xen/smp_hvm.c b/arch/x86/xen/smp_hvm.c
index 056430a1080bb..6ff3c887e0b99 100644
--- a/arch/x86/xen/smp_hvm.c
+++ b/arch/x86/xen/smp_hvm.c
@@ -74,7 +74,9 @@ void __init xen_hvm_smp_init(void)
 	smp_ops.cpu_die = xen_hvm_cpu_die;
 
 	if (!xen_have_vector_callback) {
+#ifdef CONFIG_PARAVIRT_SPINLOCKS
 		nopvspin = true;
+#endif
 		return;
 	}
 
-- 
2.27.0