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    Subject[PATCH 08/23] xen: statically initialize cpu_evtchn_mask_p
    Date
    From: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

    Sometimes cpu_evtchn_mask_p can get used early, before it has been
    allocated. Statically initialize it with an initdata version to catch
    any early references.

    Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
    Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
    ---
    drivers/xen/events.c | 7 ++++++-
    1 files changed, 6 insertions(+), 1 deletions(-)

    diff --git a/drivers/xen/events.c b/drivers/xen/events.c
    index a98e720..e1bd0be 100644
    --- a/drivers/xen/events.c
    +++ b/drivers/xen/events.c
    @@ -104,7 +104,12 @@ static int *evtchn_to_irq;
    struct cpu_evtchn_s {
    unsigned long bits[NR_EVENT_CHANNELS/BITS_PER_LONG];
    };
    -static struct cpu_evtchn_s *cpu_evtchn_mask_p;
    +
    +static __initdata struct cpu_evtchn_s init_evtchn_mask = {
    + .bits[0 ... (NR_EVENT_CHANNELS/BITS_PER_LONG)-1] = ~0ul,
    +};
    +static struct cpu_evtchn_s *cpu_evtchn_mask_p = &init_evtchn_mask;
    +
    static inline unsigned long *cpu_evtchn_mask(int cpu)
    {
    return cpu_evtchn_mask_p[cpu].bits;
    --
    1.7.0.4


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