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Date:   Wed, 25 Oct 2017 14:40:48 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     Russell King - ARM Linux <linux@...linux.org.uk>,
        Will Deacon <will.deacon@....com>,
        Sam Ravnborg <sam@...nborg.org>,
        Michal Marek <michal.lkml@...kovi.net>
Cc:     Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Ley Foon Tan <lftan@...era.com>,
        nios2-dev@...ts.rocketboards.org,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH] kbuild: fix dependency of dtbs targets

Hi.


2017-10-10 0:05 GMT+09:00 Russell King - ARM Linux <linux@...linux.org.uk>:
> On Wed, Oct 04, 2017 at 01:27:20PM +0900, Masahiro Yamada wrote:
>> The target "dtbs" should depend on "scripts" because it needs to
>> build dtc.  The "prepare" target is unneeded here.
>
> Looks fine for ARM, as the only thing the dtbs should depend on is
> the kernel configuration (to decide which to build) and DT tooling.
>
> Acked-by: Russell King <rmk+kernel@...linux.org.uk>
>
> --


I found a potential issue on this
because the default DTB install path depends on $(KERNELRELEASE).


In top-level Makefile:
export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)


The include/config/kernel.release is created by "prepare3" target.

If the dependency on "parepare" is removed,
it is possible to run "make dtbs" and "make dtbs_install"
without creating include/config/kernel.release.

So, the $(KERNELRELEASE) could be empty when installing DTB.


Maybe, drop this patch, or reduce the dependency to "parepare3"?







-- 
Best Regards
Masahiro Yamada

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