linux-kernel - Re: drivers/char/hw_random/npcm-rng.c:166:34: warning: unused variable 'rng_dt

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Date:   Mon, 29 Jun 2020 18:02:27 +1000
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Nathan Chancellor <natechancellor@...il.com>
Cc:     kernel test robot <lkp@...el.com>,
        Tomer Maimon <tmaimon77@...il.com>, kbuild-all@...ts.01.org,
        clang-built-linux@...glegroups.com, linux-kernel@...r.kernel.org,
        Daniel Thompson <daniel.thompson@...aro.org>
Subject: Re: drivers/char/hw_random/npcm-rng.c:166:34: warning: unused
 variable 'rng_dt_id'

On Thu, Jun 25, 2020 at 11:52:47PM -0700, Nathan Chancellor wrote:
>
> No deficiency in clang, it's a W=1 build, which explicitly enables
> -Wunused-const-variable per scripts/Kbuild.extrawarn. The 0day team
> decided to enable W=1 for all build tests, hence the comment in the
> reproduce notes. A thread with discussion:
> 
> https://lore.kernel.org/lkml/202005200123.gFjGzJEH%25lkp@intel.com/

Fair enough.  I'll fix this by adding __maybe_unused.

Thanks,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt