linux-kernel - Re: [PATCH] selftests: pid_namespace and pidfd missing include

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Message-ID: <20250220174243.3be95c89@gmx.net>
Date: Thu, 20 Feb 2025 17:42:43 +0100
From: Peter Seiderer <ps.report@....net>
To: Shuah Khan <skhan@...uxfoundation.org>
Cc: Alessandro Zanni <alessandro.zanni87@...il.com>, brauner@...nel.org,
 shuah@...nel.org, linux-kernel@...r.kernel.org,
 linux-kselftest@...r.kernel.org
Subject: Re: [PATCH] selftests: pid_namespace and pidfd missing include

On Tue, 18 Feb 2025 17:26:19 -0700, Shuah Khan <skhan@...uxfoundation.org> wrote:

> On 2/12/25 17:24, Alessandro Zanni wrote:
> >> Running "make kselftest" results in several errors like these:
> >>
> >> pidfd_fdinfo_test.c:231:36: error: ‘MS_REC’ undeclared (first use in
> >> this function)
> >>    231 |         r = mount(NULL, "/", NULL, MS_REC | MS_PRIVATE, 0);
> >>
> >> pidfd_fdinfo_test.c:231:45: error: ‘MS_PRIVATE’ undeclared (first use
> >> in this function); did you mean ‘MAP_PRIVATE’?
> >>    231 |         r = mount(NULL, "/", NULL, MS_REC | MS_PRIVATE, 0);
> >>
> >> pid_max.c:48:9: warning: implicit declaration of function ‘umount2’;
> >> did you mean ‘SYS_umount2’? [-Wimplicit-function-declaration]
> >>     48 |         umount2("/proc", MNT_DETACH);
> >>
> >> This patch adds the <sys/mount.h> include in pidfd_fdinfo_test.c and
> >> pid_max.c files to find the variables MS_REC, MS_PRIVATE, MNT_DETACH.
> >>
> >> Signed-off-by: Alessandro Zanni <alessandro.zanni87@...il.com>
> >> ---
> >>   tools/testing/selftests/pid_namespace/pid_max.c   | 1 +
> >>   tools/testing/selftests/pidfd/pidfd_fdinfo_test.c | 1 +
> >>   2 files changed, 2 insertions(+)
> >>
> >> diff --git a/tools/testing/selftests/pid_namespace/pid_max.c b/tools/testing/selftests/pid_namespace/pid_max.c
> >> index 51c414faabb0..972bedc475f1 100644
> >> --- a/tools/testing/selftests/pid_namespace/pid_max.c
> >> +++ b/tools/testing/selftests/pid_namespace/pid_max.c
> >> @@ -11,6 +11,7 @@
> >>   #include <string.h>
> >>   #include <syscall.h>
> >>   #include <sys/wait.h>
> >> +#include <sys/mount.h>
> >>
> >>   #include "../kselftest_harness.h"
> >>   #include "../pidfd/pidfd.h"
> >> diff --git a/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c b/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
> >> index f062a986e382..f718aac75068 100644
> >> --- a/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
> >> +++ b/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
> >> @@ -13,6 +13,7 @@
> >>   #include <syscall.h>
> >>   #include <sys/wait.h>
> >>   #include <sys/mman.h>
> >> +#include <sys/mount.h>
> >>
> >>   #include "pidfd.h"
> >>   #include "../kselftest.h"
> >> --
> >> 2.43.0  

Predated patches already available, see

        https://lore.kernel.org/linux-kselftest/20250115105211.390370-1-ps.report@gmx.net/
        https://lore.kernel.org/linux-kselftest/20250115105211.390370-2-ps.report@gmx.net/
	https://lore.kernel.org/linux-kselftest/20250115105211.390370-3-ps.report@gmx.net/

Regards,
Peter

~                                                                               
~                     
> > 
> > Hello,
> > 
> > I'm reaching out to know if you have any comments or
> > feedbacks about this patch.
> >   
> 
> Christian, would you like me to pick this patch up?
> 
> thanks,
> -- Shuah