btrfs: extent-tree: Remove dead alignment check

In find_free_extent() under checks: label, we have the following code:

		search_start = ALIGN(offset, fs_info->stripesize);
		/* move on to the next group */
		if (search_start + num_bytes >
		    block_group->key.objectid + block_group->key.offset) {
			btrfs_add_free_space(block_group, offset, num_bytes);
			goto loop;
		}
		if (offset < search_start)
			btrfs_add_free_space(block_group, offset,
					     search_start - offset);
		BUG_ON(offset > search_start);

However ALIGN() is rounding up, thus @search_start >= @offset and that
BUG_ON() will never be triggered.

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/extent-tree.c b/fs/btrfs/extent-tree.c
index fd109bf..c71aa11 100644 (file)
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -7564,7 +7564,7 @@ unclustered_alloc:
                        goto loop;
                }
 checks:
-               search_start = ALIGN(offset, fs_info->stripesize);
+               search_start = round_up(offset, fs_info->stripesize);
 
                /* move on to the next group */
                if (search_start + num_bytes >
@@ -7576,7 +7576,6 @@ checks:
                if (offset < search_start)
                        btrfs_add_free_space(block_group, offset,
                                             search_start - offset);
-               BUG_ON(offset > search_start);
 
                ret = btrfs_add_reserved_bytes(block_group, ram_bytes,
                                num_bytes, delalloc);