linux-kernel - Re: [PATCH v4] selftests: add headers

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Message-ID: <3f332e65-0b33-9952-6aba-f9c8953a1f26@kernel.org>
Date:   Mon, 6 Aug 2018 11:03:54 -0600
From:   Shuah Khan <shuah@...nel.org>
To:     Anders Roxell <anders.roxell@...aro.org>
Cc:     Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Michal Marek <michal.lkml@...kovi.net>,
        Bamvor Zhang <bamv2005@...il.com>, brgl@...ev.pl,
        Paolo Bonzini <pbonzini@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Mike Rapoport <rppt@...ux.vnet.ibm.com>, aarcange@...hat.com,
        linux-kbuild@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>,
        Networking <netdev@...r.kernel.org>,
        Shuah Khan <shuah@...nel.org>
Subject: Re: [PATCH v4] selftests: add headers_install to lib.mk

Hi Anders,

On 07/25/2018 10:08 AM, Anders Roxell wrote:
> On Tue, 24 Jul 2018 at 19:11, Shuah Khan <shuah@...nel.org> wrote:
>>
>> On 07/23/2018 02:49 PM, Anders Roxell wrote:
>>> On Thu, 7 Jun 2018 at 13:09, Anders Roxell <anders.roxell@...aro.org> wrote:
>>>>
>>>> If the kernel headers aren't installed we can't build all the tests.
>>>> Add a new make target rule 'khdr' in the file lib.mk to generate the
>>>> kernel headers and that gets include for every test-dir Makefile that
>>>> includes lib.mk If the testdir in turn have its own sub-dirs the
>>>> top_srcdir needs to be set to the linux-rootdir to be able to generate
>>>> the kernel headers.
>>>>
>>>> Signed-off-by: Anders Roxell <anders.roxell@...aro.org>
>>>> Reviewed-by: Fathi Boudra <fathi.boudra@...aro.org>
>>>> ---
>>>>  Makefile                                           | 14 +-------------
>>>>  scripts/subarch.include                            | 13 +++++++++++++
>>>>  tools/testing/selftests/android/Makefile           |  2 +-
>>>>  tools/testing/selftests/android/ion/Makefile       |  2 ++
>>>>  tools/testing/selftests/futex/functional/Makefile  |  1 +
>>>>  tools/testing/selftests/gpio/Makefile              |  7 ++-----
>>>>  tools/testing/selftests/kvm/Makefile               |  7 ++-----
>>>>  tools/testing/selftests/lib.mk                     | 12 ++++++++++++
>>>>  tools/testing/selftests/net/Makefile               |  1 +
>>>>  .../selftests/networking/timestamping/Makefile     |  1 +
>>>>  tools/testing/selftests/vm/Makefile                |  4 ----
>>>>  11 files changed, 36 insertions(+), 28 deletions(-)
>>>>  create mode 100644 scripts/subarch.include
>>>>
>>>> diff --git a/Makefile b/Makefile
>>>> index 6b9aea95ae3a..8050072300fa 100644
>>>> --- a/Makefile
>>>> +++ b/Makefile
>>>> @@ -286,19 +286,7 @@ KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
>>>>  KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
>>>>  export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
>>>>
>>>> -# SUBARCH tells the usermode build what the underlying arch is.  That is set
>>>> -# first, and if a usermode build is happening, the "ARCH=um" on the command
>>>> -# line overrides the setting of ARCH below.  If a native build is happening,
>>>> -# then ARCH is assigned, getting whatever value it gets normally, and
>>>> -# SUBARCH is subsequently ignored.
>>>> -
>>>> -SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
>>>> -                                 -e s/sun4u/sparc64/ \
>>>> -                                 -e s/arm.*/arm/ -e s/sa110/arm/ \
>>>> -                                 -e s/s390x/s390/ -e s/parisc64/parisc/ \
>>>> -                                 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
>>>> -                                 -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ \
>>>> -                                 -e s/riscv.*/riscv/)
>>>> +include scripts/subarch.include
>>
>> What is the reason for this SUBARCH block move to to scripts/subarch.include?
>> Is this necessary for adding headers install dependency to lib.mk?
> 
> This is needed to create headers for cross build.
> 

I am sorry for the delay on this patch. I am going to get this into 4.19.
If anybody has objections, please let me.

Anders! Will be able to rebase the patch and send me the latest. I think
I have Acks from kvm, android, and vm so far.

thanks,
-- Shuah