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Date:   Wed, 6 Mar 2019 10:09:28 -0800
From:   Linus Torvalds <>
To:     Arnd Bergmann <>
Cc:, Linux ARM <>,
        Linux Kernel Mailing List <>,
        arm-soc <>
Subject: Re: [GIT PULL 3/6] ARM: SoC driver updates for 5.1

On Wed, Mar 6, 2019 at 7:34 AM Arnd Bergmann <> wrote:
>   git:// tags/armsoc-drivers

This caused a surprising number of kernel file rebuilds for me, and
the reason was

>  include/linux/mod_devicetable.h                                     |   9 +

It turns out that the above is indirectly included from a _lot_ of
code device header files.

The reason seems to be the various 'struct *_device_id' declarations,
that then all the different header files want.

So a tiny change in an oddball header file causes a lot of recompiles.

Oh well. I don't know if there is anything to be done, but I did react
to how some surprising changes cause a lot of build activity, and it's
not always obvious.


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