linux-kernel - Re: [PATCH 12/13] regulator: add pm8008 pmic regulator driver

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Message-ID: <20240514140446.706847-1-quic_skakitap@quicinc.com>
Date: Tue, 14 May 2024 19:34:46 +0530
From: Satya Priya Kakitapalli <quic_skakitap@...cinc.com>
To: <johan@...nel.org>
CC: <andersson@...nel.org>, <andy.shevchenko@...il.com>, <broonie@...nel.org>,
        <conor+dt@...nel.org>, <devicetree@...r.kernel.org>,
        <johan+linaro@...nel.org>, <konrad.dybcio@...aro.org>,
        <krzk+dt@...nel.org>, <lee@...nel.org>, <lgirdwood@...il.com>,
        <linus.walleij@...aro.org>, <linux-arm-msm@...r.kernel.org>,
        <linux-gpio@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <quic_skakitap@...cinc.com>, <robh@...nel.org>, <swboyd@...omium.org>
Subject: Re: [PATCH 12/13] regulator: add pm8008 pmic regulator driver

> On Thu, May 09, 2024 at 03:07:02PM +0300, Andy Shevchenko wrote:
> > Wed, May 08, 2024 at 10:37:50PM +0000, Stephen Boyd kirjoitti:
> > > Quoting Johan Hovold (2024-05-06 08:08:29)
> > 
> > ...
> > 
> > > > +               BUILD_BUG_ON((ARRAY_SIZE(pldo_ranges) != 1) ||
> > > 
> > > This should be an && not || right?
> > 
> > > > +                               (ARRAY_SIZE(nldo_ranges) != 1));
> > 
> > In any case BUILD_BUG_ON() is not encouraged for such cases, it would be much
> > better to have a static_assert() near to one of those arrays.
> 
> I think the reason it is placed here is that the above line reads:
> 
> 	rdesc->n_linear_ranges = 1;
> 
> and that would need to change if anyone expands the arrays.

Correct. static_assert() cannot be used in the middle of code here, it can only be used at the declarations part which doesn't serve the purpose.
So, BUILD_BUG_ON is the only way to go here.