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From: Arend Van Spriel <arend.vanspriel@broadcom.com>
To: Kalle Valo <kvalo@kernel.org>, Arnd Bergmann <arnd@kernel.org>
CC: Nathan Chancellor <nathan@kernel.org>, "Greg Kroah-Hartman" <gregkh@suse.de>, "Pieter-Paul Giesberts" <pieterpg@broadcom.com>, Arnd Bergmann <arnd@arndb.de>, Nick Desaulniers <ndesaulniers@google.com>, Bill Wendling <morbo@google.com>, Justin Stitt <justinstitt@google.com>, Artem Chernyshev <artem.chernyshev@red-soft.ru>, Jonas Gorski <jonas.gorski@gmail.com>, <linux-wireless@vger.kernel.org>, <brcm80211@lists.linux.dev>, <brcm80211-dev-list.pdl@broadcom.com>, <linux-kernel@vger.kernel.org>, <llvm@lists.linux.dev>
Date: Thu, 15 Feb 2024 14:48:32 +0100
Message-ID: <18dad06ab80.279b.9b12b7fc0a3841636cfb5e919b41b954@broadcom.com>
In-Reply-To: <170799320307.3764215.10635499094580279814.kvalo@kernel.org>
References: <20240213100548.457854-1-arnd@kernel.org>
 <170799320307.3764215.10635499094580279814.kvalo@kernel.org>
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Subject: Re: [PATCH] brcmsmac: avoid function pointer casts
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On February 15, 2024 11:33:30 AM Kalle Valo <kvalo@kernel.org> wrote:

> Arnd Bergmann <arnd@kernel.org> wrote:
>
>> From: Arnd Bergmann <arnd@arndb.de>
>>
>> An old cleanup went a little too far and causes a warning with clang-16
>> and higher as it breaks control flow integrity (KCFI) rules:
>>
>> drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy_shim.c:64:34: error: 
>> cast from 'void (*)(struct brcms_phy *)' to 'void (*)(void *)' converts to 
>> incompatible function type [-Werror,-Wcast-function-type-strict]
>> 64 |                         brcms_init_timer(physhim->wl, (void (*)(void 
>> *))fn,
>> |                                                       ^~~~~~~~~~~~~~~~~~~~
>>
>> Change this one instance back to passing a void pointer so it can be
>> used with the timer callback interface.
>>
>> Fixes: d89a4c80601d ("staging: brcm80211: removed void * from softmac phy")
>> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
>
> I can add 'wifi:' during commit. Arend, ack?

Here it is:

Acked-by: Arend van Spriel <arend.vanspriel@broadcom.com>

>
> --
> https://patchwork.kernel.org/project/linux-wireless/patch/20240213100548.457854-1-arnd@kernel.org/
>
> https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches


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