linux-kernel - Re: [PATCH v1 1/1] serial: max3100: Convert to_max3100

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Message-ID: <ZhaguY64_XrTzl-p@smile.fi.intel.com>
Date: Wed, 10 Apr 2024 17:22:49 +0300
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org,
	Jiri Slaby <jirislaby@...nel.org>
Subject: Re: [PATCH v1 1/1] serial: max3100: Convert to_max3100_port() to be
 static inline

On Wed, Apr 10, 2024 at 04:20:10PM +0200, Greg Kroah-Hartman wrote:
> On Wed, Apr 10, 2024 at 05:11:35PM +0300, Andy Shevchenko wrote:
> > As Jiri rightfully pointed out the current to_max3100_port() macro
> > implementation is fragile in a sense that it expects the variable
> > name to be port, otherwise it blow up the build.
> > 
> > Change this to be static inline to prevent bad compilation.
> 
> Is there a problem today? 

Nope. And if anyone tries to make it a problem it won't build, so
unlikely problematic code can ever be upstreamed.

> If not, this line isn't needed, as it sounds
> like you are fixing a problem here, when all you are doing is making it
> "nicer", right?

Correct.

..

> > -#define to_max3100_port(port)	container_of(port, struct max3100_port, port)
> > +static inline struct max3100_port *to_max3100_port(struct uart_port *port)
> > +{
> > +	return container_of(port, struct max3100_port, port);
> 
> Note, the one reason you might want to do this as a #define is if you
> use container_of_const() which has to be a #define.  So the fact that
> this was a define to start with is normal and not really a big deal.

Noted.

Thanks for review!

-- 
With Best Regards,
Andy Shevchenko