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Date: Thu, 7 Dec 2017 07:26:02 +0100
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Sodagudi Prasad <psodagud@codeaurora.org>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>,
        Michal Marek <mmarek@suse.com>, Greg Hackmann <ghackmann@google.com>,
        linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: unused-variable warning is getting disabled with clang
Message-ID: <20171207062602.GA12561@kroah.com>
References: <56cef2a644acc458b9457e3147abc4c0@codeaurora.org>
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On Wed, Dec 06, 2017 at 01:24:51PM -0800, Sodagudi Prasad wrote:
> 
> Hi All,
> 
> When kernel compiled with clang, following line is disabling the
> unused-variable warning. This is not the case with gcc.
> KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable)
> 
> Are there any specific reasons for disabling unused-variable with clang?

Try it and see why it is disabled :)