linux-kernel - Re: [PATCH v3 01/15] gpio: dwapb: Use modern PM macros

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Message-ID: <aR3lg0aNaoT-_7SM@smile.fi.intel.com>
Date: Wed, 19 Nov 2025 17:42:59 +0200
From: Andy Shevchenko <andriy.shevchenko@...el.com>
To: Jisheng Zhang <jszhang@...nel.org>
Cc: Doug Berger <opendmb@...il.com>,
	Florian Fainelli <florian.fainelli@...adcom.com>,
	bcm-kernel-feedback-list@...adcom.com,
	Linus Walleij <linus.walleij@...aro.org>,
	Bartosz Golaszewski <brgl@...ev.pl>,
	Hoan Tran <hoan@...amperecomputing.com>,
	Andy Shevchenko <andy@...nel.org>, Daniel Palmer <daniel@...ngy.jp>,
	Romain Perier <romain.perier@...il.com>,
	Grygorii Strashko <grygorii.strashko@...com>,
	Santosh Shilimkar <ssantosh@...nel.org>,
	Kevin Hilman <khilman@...nel.org>,
	Robert Jarzmik <robert.jarzmik@...e.fr>,
	Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	Shubhrajyoti Datta <shubhrajyoti.datta@....com>,
	Srinivas Neeli <srinivas.neeli@....com>,
	Michal Simek <michal.simek@....com>, linux-gpio@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-omap@...r.kernel.org
Subject: Re: [PATCH v3 01/15] gpio: dwapb: Use modern PM macros

On Wed, Nov 19, 2025 at 10:43:13PM +0800, Jisheng Zhang wrote:
> Use the modern PM macros for the suspend and resume functions to be
> automatically dropped by the compiler when CONFIG_PM or
> CONFIG_PM_SLEEP are disabled, without having to use #ifdef guards.
> 
> This has the advantage of always compiling these functions in,
> independently of any Kconfig option. Thanks to that, bugs and other
> regressions are subsequently easier to catch.

...

> -#ifdef CONFIG_PM_SLEEP
>  /* Store GPIO context across system-wide suspend/resume transitions */
>  struct dwapb_context {
>  	u32 data;

>  	u32 int_deb;
>  	u32 wake_en;
>  };
> -#endif

This ifdeffery is to protect the type definition? It may be removed for sure.

...

>  struct dwapb_gpio_port_irqchip {
>  	unsigned int		nr_irqs;

>  	struct gpio_generic_chip chip;
>  	struct dwapb_gpio_port_irqchip *pirq;
>  	struct dwapb_gpio	*gpio;
> -#ifdef CONFIG_PM_SLEEP
>  	struct dwapb_context	*ctx;
> -#endif

But why this? For the PM_SLEEP=n cases it will give an unrequested overhead.

>  	unsigned int		idx;
>  };

Otherwise LGTM.

-- 
With Best Regards,
Andy Shevchenko