--- linux-2.6.15/include/linux/percpu.h	2006-01-03 04:21:10.000000000 +0100
+++ linux-2.6.15-edum/include/linux/percpu.h	2006-01-05 14:45:48.000000000 +0100
@@ -18,8 +18,7 @@
 #ifdef CONFIG_SMP
 
 struct percpu_data {
-	void *ptrs[NR_CPUS];
-	void *blkp;
+	void *ptrs[1]; /* real size depends on highest_possible_processor_id() */
 };
 
 /* 
--- linux-2.6.15/mm/slab.c	2006-01-03 04:21:10.000000000 +0100
+++ linux-2.6.15-edum/mm/slab.c	2006-01-05 14:37:13.000000000 +0100
@@ -2949,7 +2949,8 @@
 void *__alloc_percpu(size_t size, size_t align)
 {
 	int i;
-	struct percpu_data *pdata = kmalloc(sizeof (*pdata), GFP_KERNEL);
+	size_t pdsize = highest_possible_processor_id() * sizeof(void *);
+	struct percpu_data *pdata = kmalloc(pdsize, GFP_KERNEL);
 
 	if (!pdata)
 		return NULL;