linux-kernel - Re: [greybus-dev] [PATCH] staging: greybus: fixed the coding style, labels should not be indented.

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Message-ID: <613239d4-c4a6-8585-5f9e-0241f0caa5ec@linaro.org>
Date:   Fri, 4 Jun 2021 07:34:05 -0500
From:   Alex Elder <elder@...aro.org>
To:     David Laight <David.Laight@...LAB.COM>,
        'Manikishan Ghantasala' <manikishanghantasala@...il.com>,
        Alex Elder <elder@...e.org>
Cc:     Alex Elder <elder@...nel.org>,
        "greybus-dev@...ts.linaro.org" <greybus-dev@...ts.linaro.org>,
        "linux-staging@...ts.linux.dev" <linux-staging@...ts.linux.dev>,
        Johan Hovold <johan@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [greybus-dev] [PATCH] staging: greybus: fixed the coding style,
 labels should not be indented.

On 6/4/21 3:13 AM, David Laight wrote:
> Yes, and it isn't at all clear what it actually means.
> If the value of a bool memory location isn't 0 or 1
> what does 'bool_a & bool_b' mean.

I think this discussion is done, but I wanted to point out
that the above expression is incorrect.  It might be valid,
but it would be bad code.  A Boolean, when properly used,
should only be compared with true and false (or the result
of another Boolean expression).  Therefore "&" is not the
right operator, "&&" is.  The reason is similar to why you
would never use ~bool_a, you use !bool_a to invert its value.

					-Alex