linux-kernel - [PATCH 5.10 163/171] selftests/cgroup: Fix build on older distros

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Date:   Tue, 12 Apr 2022 08:30:54 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Michael Ellerman <mpe@...erman.id.au>,
        Christian Brauner <christian.brauner@...ntu.com>,
        Shuah Khan <skhan@...uxfoundation.org>,
        Ovidiu Panait <ovidiu.panait@...driver.com>,
        Sachin Sant <sachinp@...ux.vnet.ibm.com>
Subject: [PATCH 5.10 163/171] selftests/cgroup: Fix build on older distros

From: Sachin Sant <sachinp@...ux.vnet.ibm.com>

commit c2e46f6b3e3551558d44c4dc518b9667cb0d5f8b upstream.

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@...erman.id.au>
Signed-off-by: Sachin Sant <sachinp@...ux.vnet.ibm.com>>
Acked-by: Christian Brauner <christian.brauner@...ntu.com>
Signed-off-by: Shuah Khan <skhan@...uxfoundation.org>
Signed-off-by: Ovidiu Panait <ovidiu.panait@...driver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 tools/testing/selftests/cgroup/cgroup_util.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/tools/testing/selftests/cgroup/cgroup_util.c
+++ 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