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Message-Id: <20210115191123.27572-1-rdunlap@infradead.org>
Date: Fri, 15 Jan 2021 11:11:23 -0800
From: Randy Dunlap <rdunlap@...radead.org>
To: linux-kernel@...r.kernel.org
Cc: Randy Dunlap <rdunlap@...radead.org>,
David Woodhouse <dwmw@...zon.co.uk>,
Juergen Gross <jgross@...e.com>
Subject: [PATCH -next] x86/xen: fix 'nopvspin' build error
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>
Cc: David Woodhouse <dwmw@...zon.co.uk>
Cc: Juergen Gross <jgross@...e.com>
---
I tried to use IS_ENABLED(CONFIG_PARAVIRT_SPINLOCKS) on the if line
and on the nopvspin assignment line but both of those failed for me--
using gcc 7.5.0.
arch/x86/xen/smp_hvm.c | 2 ++
1 file changed, 2 insertions(+)
--- linux-next-20210115.orig/arch/x86/xen/smp_hvm.c
+++ linux-next-20210115/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;
}
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