diff --git a/arch/arc/include/asm/processor.h b/arch/arc/include/asm/processor.h
index 9fa23f2..b59dec4 100644
--- a/arch/arc/include/asm/processor.h
+++ b/arch/arc/include/asm/processor.h
@@ -123,7 +123,7 @@
  */
 
 #define QTN_MEM_ARCH		1
-#define QTN_MEM_FIXED_TASK_SIZE 1
+#define QTN_MEM_FIXED_TASK_SIZE 0
 
 #if QTN_MEM_ARCH
 /* QTN defined memory arch */
@@ -177,6 +177,6 @@
 /* This decides where the kernel will search for a free chunk of vm
  * space during mmap's.
  */
-#define TASK_UNMAPPED_BASE      (TASK_SIZE / 3)
+#define TASK_UNMAPPED_BASE      ( ( TASK_SIZE / 3) & PAGE_MASK)
 
 #endif /* __ASM_ARC_PROCESSOR_H */