linux-kernel - Re: [PATCH v2] ath5k: Remove unused BUG

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Date:   Mon,  1 Oct 2018 15:36:32 +0000 (UTC)
From:   Kalle Valo <kvalo@...eaurora.org>
To:     Nathan Chancellor <natechancellor@...il.com>
Cc:     Jiri Slaby <jirislaby@...il.com>,
        Nick Kossifidis <mickflemm@...il.com>,
        "Luis R. Rodriguez" <mcgrof@...not-panic.com>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Nathan Chancellor <natechancellor@...il.com>
Subject: Re: [PATCH v2] ath5k: Remove unused BUG_ON

Nathan Chancellor <natechancellor@...il.com> wrote:

> Clang warns that the address of a pointer will always evaluated as true
> in a boolean context:
> 
> drivers/net/wireless/ath/ath5k/debug.c:1031:14: warning: address of
> array 'ah->sbands' will always evaluate to 'true'
> [-Wpointer-bool-conversion]
>         BUG_ON(!ah->sbands);
>                ~~~~~^~~~~~
> ./include/asm-generic/bug.h:61:45: note: expanded from macro 'BUG_ON'
> #define BUG_ON(condition) do { if (unlikely(condition)) BUG(); } while (0)
>                                             ^~~~~~~~~
> ./include/linux/compiler.h:77:42: note: expanded from macro 'unlikely'
> # define unlikely(x)    __builtin_expect(!!(x), 0)
>                                             ^
> 1 warning generated.
> 
> Given that this condition is always false because of the logical not,
> just remove it.
> 
> Link: https://github.com/ClangBuiltLinux/linux/issues/130
> Signed-off-by: Nathan Chancellor <natechancellor@...il.com>

Patch applied to wireless-drivers-next.git, thanks.

0891c7f4a253 ath5k: Remove unused BUG_ON

-- 
https://patchwork.kernel.org/patch/10610881/

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