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From: Konrad Rzeszutek Wilk on 4 Aug 2010 14:30
From: Jeremy Fitzhardinge <jeremy.fitzhardinge(a)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(a)citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk(a)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 64cde24..35718db 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -99,7 +99,12 @@ 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;
--
1.7.0.1

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