export pid symbols needed for kvm_vcpu_on_spin

Export the symbols required for a race-free kvm_vcpu_on_spin.

Signed-off-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/kernel/pid.c b/kernel/pid.c
index 39b65b6..02f2212 100644
--- a/kernel/pid.c
+++ b/kernel/pid.c
@@ -435,6 +435,7 @@
 	rcu_read_unlock();
 	return pid;
 }
+EXPORT_SYMBOL_GPL(get_task_pid);
 
 struct task_struct *get_pid_task(struct pid *pid, enum pid_type type)
 {
@@ -446,6 +447,7 @@
 	rcu_read_unlock();
 	return result;
 }
+EXPORT_SYMBOL_GPL(get_pid_task);
 
 struct pid *find_get_pid(pid_t nr)
 {