netdev - Re: [PATCH v2] selftests/seccomp: Fix seccomp failure by adding missing headers

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Message-ID: <63e239fc-9282-0276-50b2-3172a446262d@collabora.com>
Date:   Fri, 11 Feb 2022 04:11:40 +0500
From:   Muhammad Usama Anjum <usama.anjum@...labora.com>
To:     Sherry Yang <sherry.yang@...cle.com>, skhan@...uxfoundation.org,
        shuah@...nel.org, keescook@...omium.org, luto@...capital.net,
        wad@...omium.org, christian@...uner.io, ast@...nel.org,
        daniel@...earbox.net, andrii@...nel.org, kafai@...com,
        songliubraving@...com, yhs@...com, john.fastabend@...il.com,
        kpsingh@...nel.org
Cc:     usama.anjum@...labora.com, linux-kselftest@...r.kernel.org,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        bpf@...r.kernel.org
Subject: Re: [PATCH v2] selftests/seccomp: Fix seccomp failure by adding
 missing headers

On 2/11/22 1:30 AM, Sherry Yang wrote:
> seccomp_bpf failed on tests 47 global.user_notification_filter_empty
> and 48 global.user_notification_filter_empty_threaded when it's
> tested on updated kernel but with old kernel headers. Because old
> kernel headers don't have definition of macro __NR_clone3 which is
> required for these two tests. Since under selftests/, we can install
> headers once for all tests (the default INSTALL_HDR_PATH is
> usr/include), fix it by adding usr/include to the list of directories
> to be searched. Use "-isystem" to indicate it's a system directory as
> the real kernel headers directories are.
> 
> Signed-off-by: Sherry Yang <sherry.yang@...cle.com>
> Tested-by: Sherry Yang <sherry.yang@...cle.com>
> ---
>  tools/testing/selftests/seccomp/Makefile | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tools/testing/selftests/seccomp/Makefile b/tools/testing/selftests/seccomp/Makefile
> index 0ebfe8b0e147..585f7a0c10cb 100644
> --- a/tools/testing/selftests/seccomp/Makefile
> +++ b/tools/testing/selftests/seccomp/Makefile
> @@ -1,5 +1,5 @@
>  # SPDX-License-Identifier: GPL-2.0
> -CFLAGS += -Wl,-no-as-needed -Wall
> +CFLAGS += -Wl,-no-as-needed -Wall -isystem ../../../../usr/include/"../../../../usr/include/" directory doesn't have header files if
different output directory is used for kselftests build like "make -C
tools/tests/selftest O=build". Can you try adding recently added
variable, KHDR_INCLUDES here which makes this kind of headers inclusion
easy and correct for other build combinations as well?