Subject: powerpc: slice fix test size

From: Benjamin Herrenschmidt <bherren@au1.ibm.com>
Fix testing of size for non standard mappings in slice code

Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>

Index: linux-2.6/arch/powerpc/mm/slice.c
===================================================================
--- linux-2.6.orig/arch/powerpc/mm/slice.c
+++ linux-2.6/arch/powerpc/mm/slice.c
@@ -405,6 +405,8 @@ unsigned long slice_get_unmapped_area(un
 
 	if (len > mm->task_size)
 		return -ENOMEM;
+	if (len & ((1ul << pshift) - 1))
+		return -EINVAL;
 	if (fixed && (addr & ((1ul << pshift) - 1)))
 		return -EINVAL;
 	if (fixed && addr > (mm->task_size - len))