[PATCH V2] selftests/cgroup: Fix build on older distros

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On older distros struct clone_args does not have a cgroup member,
leading to build errors:

 cgroup_util.c: In function 'clone_into_cgroup':
 cgroup_util.c:343:4: error: 'struct clone_args' has no member named 'cgroup'
 cgroup_util.c:346:33: error: invalid application of 'sizeof' to incomplete
  type 'struct clone_args'

But the selftests already have a locally defined version of the
structure which is up to date, called __clone_args.

So use __clone_args which fixes the error.

Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Signed-off-by: Sachin Sant <sachinp@xxxxxxxxxxxxxxxxxx>>
Acked-by: Christian Brauner <christian.brauner@xxxxxxxxxx>
---

V2: Replace all instances of clone_args by __clone_args
---

diff --git a/a/tools/testing/selftests/cgroup/cgroup_util.c b/b/tools/testing/selftests/cgroup/cgroup_util.c
index 05853b0..0270146 100644
--- a/a/tools/testing/selftests/cgroup/cgroup_util.c
+++ b/b/tools/testing/selftests/cgroup/cgroup_util.c
@@ -337,13 +337,13 @@ pid_t clone_into_cgroup(int cgroup_fd)
 #ifdef CLONE_ARGS_SIZE_VER2
 	pid_t pid;
 
-	struct clone_args args = {
+	struct __clone_args args = {
 		.flags = CLONE_INTO_CGROUP,
 		.exit_signal = SIGCHLD,
 		.cgroup = cgroup_fd,
 	};
 
-	pid = sys_clone3(&args, sizeof(struct clone_args));
+	pid = sys_clone3(&args, sizeof(struct __clone_args));
 	/*
 	 * Verify that this is a genuine test failure:
 	 * ENOSYS -> clone3() not available



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