btrfs-progs: calc-size: use on-stack buffer for a helper structure

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

diff --git a/btrfs-calc-size.c b/btrfs-calc-size.c
index b84cda95feb1e94fcd42c27dae4a68f37a9fbffb..6956424294880198a2fa8693504a972261594dbb 100644 (file)
--- a/btrfs-calc-size.c
+++ b/btrfs-calc-size.c
@@ -436,9 +436,8 @@ static void usage(void)
 int main(int argc, char **argv)
 {
        struct btrfs_key key;
-       struct fs_root *roots;
+       struct fs_root roots;
        struct btrfs_root *root;
-       size_t fs_roots_size = sizeof(struct fs_root);
        int opt;
        int ret = 0;
 
@@ -482,12 +481,6 @@ int main(int argc, char **argv)
                exit(1);
        }
 
-       roots = malloc(fs_roots_size);
-       if (!roots) {
-               fprintf(stderr, "No memory\n");
-               goto out;
-       }
-
        printf("Calculating size of root tree\n");
        key.objectid = BTRFS_ROOT_TREE_OBJECTID;
        ret = calc_root_size(root, &key, 0);
@@ -506,15 +499,14 @@ int main(int argc, char **argv)
        if (ret)
                goto out;
 
-       roots[0].key.objectid = BTRFS_FS_TREE_OBJECTID;
-       roots[0].key.offset = (u64)-1;
+       roots.key.objectid = BTRFS_FS_TREE_OBJECTID;
+       roots.key.offset = (u64)-1;
        printf("Calculatin' size of fs tree\n");
-       ret = calc_root_size(root, &roots[0].key, 1);
+       ret = calc_root_size(root, &roots.key, 1);
        if (ret)
                goto out;
 out:
        close_ctree(root);
-       free(roots);
        btrfs_close_all_devices();
        return ret;
 }