From: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
The mtrr code uses num_booting_cpus() to manage its corrdinated mtrr update,
which in turn depends on cpu_callout_mask.
[ Impact: bugfix; make /proc/mtrr writes work in Xen ]
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
---
arch/x86/xen/smp.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
index 429834e..4706af7 100644
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -297,6 +297,8 @@ static int __cpuinit xen_cpu_up(unsigned int cpu)
xen_setup_timer(cpu);
xen_init_lock_cpu(cpu);
+ cpumask_set_cpu(cpu, cpu_callout_mask);
+
per_cpu(cpu_state, cpu) = CPU_UP_PREPARE;
/* make sure interrupts start blocked */
--
1.6.0.6
--
