linux-kernel - Re: [PATCH] wireless: carl9170: fix clang build warning

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Message-Id: <20190429150125.1BB9460CEC@smtp.codeaurora.org>
Date:   Mon, 29 Apr 2019 15:01:24 +0000 (UTC)
From:   Kalle Valo <kvalo@...eaurora.org>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Christian Lamparter <chunkeey@...glemail.com>,
        "David S. Miller" <davem@...emloft.net>,
        clang-built-linux@...glegroups.com,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Nathan Chancellor <natechancellor@...il.com>,
        Arnd Bergmann <arnd@...db.de>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] wireless: carl9170: fix clang build warning

Arnd Bergmann <arnd@...db.de> wrote:

> clang fails to eliminate some dead code with always-taken branches
> when CONFIG_PROFILE_ANNOTATED_BRANCHES is set, leading to a false-positive
> warning:
> 
> drivers/net/wireless/ath/carl9170/mac.c:522:3: error: variable 'power' is used uninitialized whenever 'if' condition is
>       false [-Werror,-Wsometimes-uninitialized]
>                 BUG_ON(1);
>                 ^~~~~~~~~
> 
> Change both instances of BUG_ON(1) in carl9170 to the simpler BUG()
> to avoid the warning.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> Acked-by: Christian Lamparter <chunkeey@...il.com>
> Signed-off-by: Kalle Valo <kvalo@...eaurora.org>

Patch applied to ath-next branch of ath.git, thanks.

62acdcfa8b7a wireless: carl9170: fix clang build warning

-- 
https://patchwork.kernel.org/patch/10869053/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches