Fixed a couple of problems with the configurable stack size changes.

include/asm-um/current.h

@@ -14,7 +14,7 @@ struct thread_info;
 #include "asm/page.h"
 
 #define CURRENT_THREAD(dummy) (((unsigned long) &dummy) & \
-			        (PAGE_MASK << CONFIG_KERNEL_SACK_ORDER))
+			        (PAGE_MASK << CONFIG_KERNEL_STACK_ORDER))
 
 #define current ({ int dummy; \
                    ((struct thread_info *) CURRENT_THREAD(dummy))->task; })

include/asm-um/processor-generic.h

@@ -94,7 +94,7 @@ struct thread_struct {
 	.request		= { 0 } \
 }
 
-#define THREAD_SIZE ((1 << CONFIG_KERNEL_STACK_ORDER) * PAGE_SIZE)
+#define INIT_THREAD_SIZE ((1 << CONFIG_KERNEL_STACK_ORDER) * PAGE_SIZE)
 
 typedef struct {
 	unsigned long seg;