btrfs-progs: check: use on-stack path buffer in check_fs_first_inode

We don't need to conserve stack space too much unlike kernel, also
remove one error condition.

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

diff --git a/cmds-check.c b/cmds-check.c
index fceaec4..4cd0fcd 100644 (file)
--- a/cmds-check.c
+++ b/cmds-check.c
@@ -4934,19 +4934,17 @@ out:
 
 static int check_fs_first_inode(struct btrfs_root *root, unsigned int ext_ref)
 {
-       struct btrfs_path *path;
+       struct btrfs_path path;
        struct btrfs_key key;
        int err = 0;
        int ret;
 
-       path = btrfs_alloc_path();
-       if (!path)
-               return -ENOMEM;
+       btrfs_init_path(&path);
        key.objectid = BTRFS_FIRST_FREE_OBJECTID;
        key.type = BTRFS_INODE_ITEM_KEY;
        key.offset = 0;
 
-       ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
+       ret = btrfs_search_slot(NULL, root, &key, &path, 0, 0);
        if (ret < 0)
                goto out;
        if (ret > 0) {
@@ -4954,12 +4952,12 @@ static int check_fs_first_inode(struct btrfs_root *root, unsigned int ext_ref)
                err |= INODE_ITEM_MISSING;
        }
 
-       err |= check_inode_item(root, path, ext_ref);
+       err |= check_inode_item(root, &path, ext_ref);
        err &= ~LAST_ITEM;
        if (err && !ret)
                ret = -EIO;
 out:
-       btrfs_free_path(path);
+       btrfs_release_path(&path);
        return ret;
 }