linux-kernel - Re: [PATCH 6/7] fs/sysfs/group: make attribute

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Message-ID: <2023101025-yogurt-masses-47da@gregkh>
Date:   Tue, 10 Oct 2023 07:59:07 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Max Kellermann <max.kellermann@...os.com>
Cc:     Guenter Roeck <linux@...ck-us.net>, Jens Axboe <axboe@...nel.dk>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
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Subject: Re: [PATCH 6/7] fs/sysfs/group: make attribute_group pointers const

On Mon, Oct 09, 2023 at 10:05:55PM +0200, Max Kellermann wrote:
> On Mon, Oct 9, 2023 at 7:24 PM Guenter Roeck <linux@...ck-us.net> wrote:
> > Also, I don't know why checkpatch is happy with all the
> >
> >         const struct attribute_group *const*groups;
> >
> > instead of
> >
> >         const struct attribute_group *const *groups;
> 
> I found out that checkpatch has no check for this at all; it does
> complain about such lines, but only for local variables. But that
> warning is actually a bug, because this is a check for unary
> operators: it thinks the asterisk is a dereference operator, not a
> pointer declaration, and complains that the unary operator must be
> preceded by a space. Thus warnings on local variable are only correct
> by coincidence, not by design.
> 
> Inside structs or parameters (where my coding style violations can be
> found), it's a different context and thus checkpatch doesn't apply the
> rules for unary operators.

Ok, checkpatch support isn't always required, we can notice that changes
like this obviously are not sane and shouldn't be allowed just by
reading them :)

thanks,

greg k-h