[PATCH] powerpc: fix two build warnings

Building the arch/powerpc tree currently gives me
two warnings with gcc-4.0:

arch/powerpc/mm/imalloc.c: In function '__im_get_area':
arch/powerpc/mm/imalloc.c:225: warning: 'tmp' may be used uninitialized in this function
arch/powerpc/mm/hugetlbpage.c: In function 'hugetlb_get_unmapped_area':
arch/powerpc/mm/hugetlbpage.c:608: warning: unused variable 'vma'

both fixes are trivial.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/mm/hugetlbpage.c

@@ -620,7 +620,6 @@ unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
 {
 	int lastshift;
 	u16 areamask, curareas;
-	struct vm_area_struct *vma;
 
 	if (HPAGE_SHIFT == 0)
 		return -EINVAL;

arch/powerpc/mm/imalloc.c

@@ -107,6 +107,7 @@ static int im_region_status(unsigned long v_addr, unsigned long size,
 		if (v_addr < (unsigned long) tmp->addr + tmp->size)
 			break;
 
+	*vm = NULL;
 	if (tmp) {
 		if (im_region_overlaps(v_addr, size, tmp))
 			return IM_REGION_OVERLAP;
@@ -127,7 +128,6 @@ static int im_region_status(unsigned long v_addr, unsigned long size,
 		}
 	}
 
-	*vm = NULL;
 	return IM_REGION_UNUSED;
 }