btrfs: remove unnecessary variable shadowing in btrfs_invalidatepage()

In btrfs_invalidatepage() we re-declare @tree variable as
btrfs_ordered_inode_tree.

Since it's only used to do the spinlock, we can grab it from inode
directly, and remove the unnecessary declaration completely.

Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 18408b9..41517d1 100644 (file)
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -8413,15 +8413,11 @@ again:
                 * for the finish_ordered_io
                 */
                if (TestClearPagePrivate2(page)) {
-                       struct btrfs_ordered_inode_tree *tree;
-
-                       tree = &inode->ordered_tree;
-
-                       spin_lock_irq(&tree->lock);
+                       spin_lock_irq(&inode->ordered_tree.lock);
                        set_bit(BTRFS_ORDERED_TRUNCATED, &ordered->flags);
                        ordered->truncated_len = min(ordered->truncated_len,
                                                     start - ordered->file_offset);
-                       spin_unlock_irq(&tree->lock);
+                       spin_unlock_irq(&inode->ordered_tree.lock);
 
                        if (btrfs_dec_test_ordered_pending(inode, &ordered,
                                                           start,