[XFS] Use unsigned long long for end_offset so we don't overflow it.

SGI Modid: xfs-linux:xfs-kern:168809a

fs/xfs/linux/xfs_aops.c

@@ -717,7 +717,8 @@ xfs_page_state_convert(
 	struct buffer_head	*bh_arr[MAX_BUF_PER_PAGE], *bh, *head;
 	xfs_iomap_t		*iomp, iomap;
 	unsigned long		p_offset = 0, end_index;
-	loff_t			offset, end_offset;
+	loff_t			offset;
+	unsigned long long	end_offset;
 	int			len, err, i, cnt = 0, uptodate = 1;
 	int			flags = startio ? 0 : BMAPI_TRYLOCK;
 	int			page_dirty = 1;
@@ -734,9 +735,8 @@ xfs_page_state_convert(
 	}
 
 	offset = (loff_t)page->index << PAGE_CACHE_SHIFT;
-	end_offset = offset + PAGE_CACHE_SIZE;
-	if (end_offset > i_size_read(inode))
-		end_offset = i_size_read(inode);
+	end_offset = min_t(unsigned long long,
+			offset + PAGE_CACHE_SIZE, i_size_read(inode));
 
 	bh = head = page_buffers(page);
 	iomp = NULL;