add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/tools/testing/selftests/bpf/test_dev_cgroup.c
..
..
@@ -1,8 +1,5 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /* Copyright (c) 2017 Facebook
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- *
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- * This program is free software; you can redistribute it and/or
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- * modify it under the terms of version 2 of the GNU General Public
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- * License as published by the Free Software Foundation.
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  */
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 #include <stdio.h>
..
..
@@ -36,21 +33,10 @@
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 		goto out;
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 	}
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-	if (setup_cgroup_environment()) {
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-		printf("Failed to load DEV_CGROUP program\n");
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-		goto err;
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-	}
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-
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-	/* Create a cgroup, get fd, and join it */
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-	cgroup_fd = create_and_get_cgroup(TEST_CGROUP);
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-	if (!cgroup_fd) {
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+	cgroup_fd = cgroup_setup_and_join(TEST_CGROUP);
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+	if (cgroup_fd < 0) {
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 		printf("Failed to create test cgroup\n");
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-		goto err;
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-	}
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-
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-	if (join_cgroup(TEST_CGROUP)) {
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-		printf("Failed to join cgroup\n");
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-		goto err;
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+		goto out;
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 	}
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 	/* Attach bpf program */