btrfs-progs: convert: improve assert in make_convert_btrfs

Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/convert/common.c b/convert/common.c
index d37d2b2..d87d75e 100644 (file)
--- a/convert/common.c
+++ b/convert/common.c
@@ -796,8 +796,8 @@ int make_convert_btrfs(int fd, struct btrfs_mkfs_config *cfg,
        u64 csum_bytenr;
        int ret;
 
-       /* Shouldn't happen */
-       BUG_ON(cache_tree_empty(used_space));
+       /* Source filesystem must be opened, checked and analyzed in advance */
+       ASSERT(!cache_tree_empty(used_space));
 
        /*
         * reserve space for temporary superblock first