linux-kernel - Re: [PATCH] iwlwifi: mvm: Use div_s64 instead of do_div in iwl_mvm_ftm_rtt

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Date:   Sun,  9 Jan 2022 16:33:26 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     nathan@...nel.org
Cc:     johannes.berg@...el.com, kvalo@...eaurora.org,
        linux-kernel@...r.kernel.org, linux-wireless@...r.kernel.org,
        luciano.coelho@...el.com, netdev@...r.kernel.org,
        Jakub Kicinski <kuba@...nel.org>
Subject: Re: [PATCH] iwlwifi: mvm: Use div_s64 instead of do_div in iwl_mvm_ftm_rtt_smoothing()

> When building ARCH=arm allmodconfig:
> 
> drivers/net/wireless/intel/iwlwifi/mvm/ftm-initiator.c: In function ‘iwl_mvm_ftm_rtt_smoothing’:
> ./include/asm-generic/div64.h:222:35: error: comparison of distinct pointer types lacks a cast [-Werror]
>   222 |         (void)(((typeof((n)) *)0) == ((uint64_t *)0));  \
>       |                                   ^~
> drivers/net/wireless/intel/iwlwifi/mvm/ftm-initiator.c:1070:9: note: in expansion of macro ‘do_div’
>  1070 |         do_div(rtt_avg, 100);
>       |         ^~~~~~

Let me take this one directly to net-next, hope that's okay.

Thanks!