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Commit 0740c82b authored by Chris Mason's avatar Chris Mason
Browse files

Btrfs: Properly cast before shifting 



Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
parent d99cb30a

fs/btrfs/file.c

+1 −1
Original line number Diff line number Diff line
@@ -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,