sched: use alloc_bootmem() instead of alloc_bootmem_low()

There is no guarantee that there is physical ram below 4GB, and in
fact many boxes don't have exactly that.

Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/kernel/sched.c b/kernel/sched.c
index 0014b03..09ca69b 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -8128,7 +8128,7 @@
 	 * we use alloc_bootmem().
 	 */
 	if (alloc_size) {
-		ptr = (unsigned long)alloc_bootmem_low(alloc_size);
+		ptr = (unsigned long)alloc_bootmem(alloc_size);
 
 #ifdef CONFIG_FAIR_GROUP_SCHED
 		init_task_group.se = (struct sched_entity **)ptr;