linux-kernel - [PATCH v2 4/6] usb: ohci-exynos: Switch from CONFIG_PM guards to pm

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Date: Thu,  4 Apr 2024 12:43:20 +0530
From: Anand Moon <linux.amoon@...il.com>
To: Alan Stern <stern@...land.harvard.edu>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
	Alim Akhtar <alim.akhtar@...sung.com>
Cc: Anand Moon <linux.amoon@...il.com>,
	Christophe JAILLET <christophe.jaillet@...adoo.fr>,
	Johan Hovold <johan@...nel.org>,
	linux-usb@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2 4/6] usb: ohci-exynos: Switch from CONFIG_PM guards to pm_ptr()

Use the new PM macros for the suspend and resume functions to be
automatically dropped by the compiler when CONFIG_PM are disabled,
without having to use #ifdef guards. If CONFIG_PM unused,
they will simply be discarded by the compiler.

Signed-off-by: Anand Moon <linux.amoon@...il.com>
---
v2: new changes in this series.
---
 drivers/usb/host/ohci-exynos.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/drivers/usb/host/ohci-exynos.c b/drivers/usb/host/ohci-exynos.c
index 85d04ae0ae40..3e647e0b341d 100644
--- a/drivers/usb/host/ohci-exynos.c
+++ b/drivers/usb/host/ohci-exynos.c
@@ -212,8 +212,7 @@ static void exynos_ohci_shutdown(struct platform_device *pdev)
 		hcd->driver->shutdown(hcd);
 }
 
-#ifdef CONFIG_PM
-static int exynos_ohci_suspend(struct device *dev)
+static int __maybe_unused exynos_ohci_suspend(struct device *dev)
 {
 	struct usb_hcd *hcd = dev_get_drvdata(dev);
 	struct exynos_ohci_hcd *exynos_ohci = to_exynos_ohci(hcd);
@@ -230,7 +229,7 @@ static int exynos_ohci_suspend(struct device *dev)
 	return 0;
 }
 
-static int exynos_ohci_resume(struct device *dev)
+static int __maybe_unused exynos_ohci_resume(struct device *dev)
 {
 	struct usb_hcd *hcd			= dev_get_drvdata(dev);
 	struct exynos_ohci_hcd *exynos_ohci	= to_exynos_ohci(hcd);
@@ -249,10 +248,6 @@ static int exynos_ohci_resume(struct device *dev)
 
 	return 0;
 }
-#else
-#define exynos_ohci_suspend	NULL
-#define exynos_ohci_resume	NULL
-#endif
 
 static const struct ohci_driver_overrides exynos_overrides __initconst = {
 	.extra_priv_size =	sizeof(struct exynos_ohci_hcd),
@@ -277,7 +272,7 @@ static struct platform_driver exynos_ohci_driver = {
 	.shutdown	= exynos_ohci_shutdown,
 	.driver = {
 		.name	= "exynos-ohci",
-		.pm	= &exynos_ohci_pm_ops,
+		.pm	= pm_ptr(&exynos_ohci_pm_ops),
 		.of_match_table	= of_match_ptr(exynos_ohci_match),
 	}
 };
-- 
2.44.0