A recent change prevents SGI Altix from booting.
This patch fixes the problem.
The regresson was introduced in commit 
434d53b00d6bb7be0a1d3dcc0d0d5df6c042e164
Signed-off-by: Russ Anderson <rja@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
         * 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;