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Date:   Fri, 5 Oct 2018 14:10:04 +1000 (AEST)
From:   Finn Thain <fthain@telegraphics.com.au>
To:     Leonardo Bras <leobras.c@gmail.com>
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        linux-parisc@vger.kernel.org, linux-s390@vger.kernel.org
Subject: Re: [PATCH v3 3/7] drivers: parisc: Avoids building driver if
 CONFIG_PARISC is disabled
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On Thu, 4 Oct 2018, Leonardo Bras wrote:

> ... 
> But, why these chosen Makefiles, and not all of them?

I think that inconsistency is untenable. If nothing else, it means your 
changes will get broken by other people who also apply constraints 
inconsistently.

I think you need to consider what happens when you apply this regime 
tree-wide. Either that or explain why it would make sense to build e.g. 
drivers/s390 but not drivers/s390/net.

--