btrfs: change unaligned root messages to error level in btrfs_validate_super()

If the root nodes for the chunk root, tree root or log root are not sector
size aligned, we are logging a warning message but these are in fact
errors that makes the super block validation fail. So change the level of
the messages from warning to error.

Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

Author: fdmanana

fs/btrfs/disk-io.c

@@ -2416,18 +2416,18 @@ int btrfs_validate_super(const struct btrfs_fs_info *fs_info,
 
 	/* Root alignment check */
 	if (!IS_ALIGNED(btrfs_super_root(sb), sectorsize)) {
-		btrfs_warn(fs_info, "tree_root block unaligned: %llu",
-			   btrfs_super_root(sb));
+		btrfs_err(fs_info, "tree_root block unaligned: %llu",
+			  btrfs_super_root(sb));
 		ret = -EINVAL;
 	}
 	if (!IS_ALIGNED(btrfs_super_chunk_root(sb), sectorsize)) {
-		btrfs_warn(fs_info, "chunk_root block unaligned: %llu",
+		btrfs_err(fs_info, "chunk_root block unaligned: %llu",
 			   btrfs_super_chunk_root(sb));
 		ret = -EINVAL;
 	}
 	if (!IS_ALIGNED(btrfs_super_log_root(sb), sectorsize)) {
-		btrfs_warn(fs_info, "log_root block unaligned: %llu",
-			   btrfs_super_log_root(sb));
+		btrfs_err(fs_info, "log_root block unaligned: %llu",
+			  btrfs_super_log_root(sb));
 		ret = -EINVAL;
 	}