Btrfs: Properly cast before shifting
authorChris Mason <chris.mason@oracle.com>
Tue, 19 Feb 2008 21:24:18 +0000 (16:24 -0500)
committerChris Mason <chris.mason@oracle.com>
Thu, 25 Sep 2008 15:04:00 +0000 (11:04 -0400)
Signed-off-by: Chris Mason <chris.mason@oracle.com>
fs/btrfs/file.c

index 51466dc..5fa4504 100644 (file)
@@ -764,7 +764,7 @@ static int prepare_pages(struct btrfs_root *root, struct file *file,
        }
        if (start_pos < inode->i_size) {
                u64 last_pos;
-               last_pos = (index + num_pages) << PAGE_CACHE_SHIFT;
+               last_pos = ((u64)index + num_pages) << PAGE_CACHE_SHIFT;
                lock_extent(&BTRFS_I(inode)->io_tree,
                            start_pos, last_pos - 1, GFP_NOFS);
                clear_extent_bits(&BTRFS_I(inode)->io_tree, start_pos,