linux-kernel - Re: [PATCH v11 6/9] soc: qcom: cpr: Use u64 for frequency

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Message-ID: <8656ec99-82fc-3570-701d-df4266712348@linaro.org>
Date:   Tue, 27 Jun 2023 22:51:29 +0200
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Jeffrey Hugo <quic_jhugo@...cinc.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Viresh Kumar <vireshk@...nel.org>, Nishanth Menon <nm@...com>,
        Stephen Boyd <sboyd@...nel.org>,
        Niklas Cassel <nks@...wful.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>
Cc:     Robert Marko <robimarko@...il.com>, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-pm@...r.kernel.org,
        Marijn Suijten <marijn.suijten@...ainline.org>
Subject: Re: [PATCH v11 6/9] soc: qcom: cpr: Use u64 for frequency

On 27.06.2023 22:15, Jeffrey Hugo wrote:
> On 6/27/2023 12:30 PM, Konrad Dybcio wrote:
>> 32 bits is not enough for over-2.changeGHz frequencies. Move all variables
>> that operate on Hz to u64 to avoid overflows.
>>
>> Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
> 
> 
> I get the following warning when building this -
Ugh. Either didn't notice or clang wasn't unhappy with it.

Thanks for noticing.

Konrad
> 
>   CC      drivers/soc/qcom/cpr-common.o
> In file included from ./include/linux/device.h:15:0,
>                  from ./include/linux/platform_device.h:13,
>                  from ./include/linux/of_device.h:5,
>                  from drivers/soc/qcom/cpr.c:18:
> drivers/soc/qcom/cpr.c: In function ‘cpr_corner_init’:
> drivers/soc/qcom/cpr.c:870:21: warning: format ‘%lu’ expects argument of type ‘long unsigned int’, but argument 4 has type ‘u64 {aka long long unsigned int}’ [-Wformat=]
>    dev_dbg(drv->dev, "freq: %lu level: %u fuse level: %u\n",
>                      ^
> ./include/linux/dev_printk.h:129:27: note: in definition of macro ‘dev_printk’
>    _dev_printk(level, dev, fmt, ##__VA_ARGS__);  \
>                            ^~~
> ./include/linux/dev_printk.h:163:31: note: in expansion of macro ‘dev_fmt’
>    dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__); \
>                                ^~~~~~~
> drivers/soc/qcom/cpr.c:870:3: note: in expansion of macro ‘dev_dbg’
>    dev_dbg(drv->dev, "freq: %lu level: %u fuse level: %u\n",
>    ^~~~~~~