[PATCH] percpu counters cause UML compilation errors in with SMP

The percpu counters break UML SMP compilation (in current 2.5.58 bk snapshot)
(first NR_CPUS undeclared in header, then dereference of incomplete structure
in .c file)

include/linux/percpu_counter.h

@@ -7,7 +7,7 @@
 #include <linux/config.h>
 #include <linux/spinlock.h>
 #include <linux/smp.h>
-#include <linux/preempt.h>
+#include <linux/threads.h>
 
 #ifdef CONFIG_SMP
 

lib/percpu_counter.c

 
 #include <linux/percpu_counter.h>
+#include <linux/sched.h>
 
 void percpu_counter_mod(struct percpu_counter *fbc, long amount)
 {