linux-kernel - Re: [patch 6/8] kcmp selftests: build fix

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Date:	Sat, 24 Nov 2012 11:41:23 +0200
From:	Pekka Enberg <penberg@...nel.org>
To:	dyoung@...hat.com
Cc:	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	Cyrill Gorcunov <gorcunov@...nvz.org>
Subject: Re: [patch 6/8] kcmp selftests: build fix

On Sat, Nov 24, 2012 at 10:29 AM,  <dyoung@...hat.com> wrote:
> For old glibc there's no the syscall number this tests will cause
> make run_tests fail.
> Add a macro to define the number. This should be ok because it will be
> built in latest kernel source.
>
> Signed-off-by: Dave Young <dyoung@...hat.com>
> ---
>  tools/testing/selftests/kcmp/kcmp_test.c |    3 +++
>  1 file changed, 3 insertions(+)
>
> --- linux-2.6.orig/tools/testing/selftests/kcmp/kcmp_test.c     2012-11-23 22:37:04.789058192 +0800
> +++ linux-2.6/tools/testing/selftests/kcmp/kcmp_test.c  2012-11-23 22:38:43.195191747 +0800
> @@ -17,6 +17,9 @@
>  #include <sys/stat.h>
>  #include <sys/wait.h>
>
> +#ifndef __NR_kcmp
> +#define __NR_kcmp 272
> +#endif

Is the syscall number really going to be the same across all architectures?

>  static long sys_kcmp(int pid1, int pid2, int type, int fd1, int fd2)
>  {
>         return syscall(__NR_kcmp, pid1, pid2, type, fd1, fd2);
>
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