linux-kernel - Re: [PATCH 2/7] microblaze: adjust the help to the real behavior

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Date:   Thu, 6 Dec 2018 13:52:49 +0100
From:   Michal Simek <monstr@...str.eu>
To:     Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc:     Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Michal Simek <michal.simek@...inx.com>
Subject: Re: [PATCH 2/7] microblaze: adjust the help to the real behavior

On 06. 12. 18 6:27, Masahiro Yamada wrote:
> Hi Michal,
> 
> On Thu, Dec 6, 2018 at 12:41 AM Michal Simek <monstr@...str.eu> wrote:
>>
>> On 03. 12. 18 8:50, Masahiro Yamada wrote:
>>> "make ARCH=microblaze help" mentions simpleImage.<dt>.unstrip,
>>> but it never works because Makefile assumes "system.unstrip" is
>>> the name of DT.
>>>
>>> $ make ARCH=microblaze CROSS_COMPILE=microblaze-linux- simpleImage.system.unstrip
>>>   [ snip ]
>>> make[1]: *** No rule to make target 'arch/microblaze/boot/dts/system.unstrip.dtb', needed by 'arch/microblaze/boot/dts/system.dtb'.  Stop.
>>> make: *** [Makefile;1060: arch/microblaze/boot/dts] Error 2
>>> make: *** Waiting for unfinished jobs....
>>>
>>> Rip off the never-working target.
>>>
>>> In my understanding, simpleImage.<dt> works like a phony target that
>>> generates multiple images. Reflect the behavior to the help message.
>>>
>>> Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
>>> ---
>>>
>>>  arch/microblaze/Makefile | 4 +---
>>>  1 file changed, 1 insertion(+), 3 deletions(-)
>>>
>>> diff --git a/arch/microblaze/Makefile b/arch/microblaze/Makefile
>>> index 0823d29..97e1384 100644
>>> --- a/arch/microblaze/Makefile
>>> +++ b/arch/microblaze/Makefile
>>> @@ -89,9 +89,7 @@ define archhelp
>>>    echo '* linux.bin    - Create raw binary'
>>>    echo '  linux.bin.gz - Create compressed raw binary'
>>>    echo '  linux.bin.ub - Create U-Boot wrapped raw binary'
>>> -  echo '  simpleImage.<dt> - ELF image with $(arch)/boot/dts/<dt>.dts linked in'
>>> -  echo '                   - stripped elf with fdt blob'
>>> -  echo '  simpleImage.<dt>.unstrip - full ELF image with fdt blob'
>>> +  echo '  simpleImage.<dt> - Create images with $(arch)/boot/dts/<dt>.dts linked in'
>>>    echo '  *_defconfig      - Select default config from arch/microblaze/configs'
>>>    echo ''
>>>    echo '  Targets with <dt> embed a device tree blob inside the image'
>>>
>>
>> I understand what you are trying to say but I would still like to keep
>> information about unstrip file.
>> It is correct that it is not build target. It is just generated file and
>> message above was used for description what it is.
>> Definitely agree that this should be the part of targets but it should
>> be in description.
>> The same is for missing description for simpleImage.<dt>.strip and
>> simpleImage.<dt>.ub files.
>>
>> Thanks,
>> Michal
>>
> 
> If we want to be precise to the current behavior,
> we could describe more.
> (Is it too much?)
> 
> 
> Architecture specific targets (microblaze):
> * linux.bin    - Create raw binary
>   linux.bin.gz - Create compressed raw binary
>   linux.bin.ub - Create U-Boot wrapped raw binary
>   simpleImage.<dt> - Create the following images with
> arch/macroblaze/boot/dts/<dt>.dts linked in

type - microblaze
maybe <dtb> here.

>                      simpleImage.<dt>        : raw image
>                      simpleImage.<dt>.ub     : raw image with U-Boot header
>                      simpleImage.<dt>.unstrip: ELF (identical to vmlinux)
>                      simpleImage.<dt>.strip  : stripped ELF
>   *_defconfig      - Select default config from arch/microblaze/configs
> 
> 
> 
> 
> If you want to modify as you like,
> I will not touch it though.

what you have above is fine for me.

> 
> 
> 
> 
> 
> BTW, "make ARCH=microblaze help" looks like follows:
> 
> * linux.bin    - Create raw binary
>   linux.bin.gz - Create compressed raw binary
>   linux.bin.ub - Create U-Boot wrapped raw binary
>   simpleImage.<dt> - ELF image with /boot/dts/<dt>.dts linked in
>                    - stripped elf with fdt blob
>   simpleImage.<dt>.unstrip - full ELF image with fdt blob
>   *_defconfig      - Select default config from arch/microblaze/configs
> 
> 
> 
> 
> Since "arch" is not set anywhere, $(arch) is empty,
> "ELF image with /boot/dts/<dt>.dts linked in" looks strange.

As I said good to fix it in a way you have above.

Thanks,
Michal

-- 
Michal Simek, Ing. (M.Eng), OpenPGP -> KeyID: FE3D1F91
w: www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel - Xilinx Microblaze
Maintainer of Linux kernel - Xilinx Zynq ARM and ZynqMP ARM64 SoCs
U-Boot custodian - Xilinx Microblaze/Zynq/ZynqMP/Versal SoCs




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