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    Subject[PATCH 5.10 075/199] x86/xen: fix nopvspin build error
    Date
    From: Randy Dunlap <rdunlap@infradead.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@infradead.org>
    Reviewed-by: Juergen Gross <jgross@suse.com>
    Cc: David Woodhouse <dwmw@amazon.co.uk>
    Cc: Juergen Gross <jgross@suse.com>
    Link: https://lore.kernel.org/r/20210115191123.27572-1-rdunlap@infradead.org
    Signed-off-by: Juergen Gross <jgross@suse.com>
    Signed-off-by: Sasha Levin <sashal@kernel.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


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