linux-kernel - [PATCH v1 3/8] media: ov2740: Switch from __maybe_unused to pm_sleep

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Date:   Tue, 26 Jul 2022 15:05:51 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Tianshu Qiu <tian.shu.qiu@...el.com>,
        Shawn Tu <shawnx.tu@...el.com>,
        Bingbu Cao <bingbu.cao@...el.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>
Subject: [PATCH v1 3/8] media: ov2740: Switch from __maybe_unused to pm_sleep_ptr() etc

Letting the compiler remove these functions when the kernel is built
without CONFIG_PM_SLEEP support is simpler and less heavier for builds
than the use of __maybe_unused attributes.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/media/i2c/ov2740.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/media/i2c/ov2740.c b/drivers/media/i2c/ov2740.c
index 81c0ab220339..9420258c6073 100644
--- a/drivers/media/i2c/ov2740.c
+++ b/drivers/media/i2c/ov2740.c
@@ -838,7 +838,7 @@ static int ov2740_set_stream(struct v4l2_subdev *sd, int enable)
 	return ret;
 }
 
-static int __maybe_unused ov2740_suspend(struct device *dev)
+static int ov2740_suspend(struct device *dev)
 {
 	struct v4l2_subdev *sd = dev_get_drvdata(dev);
 	struct ov2740 *ov2740 = to_ov2740(sd);
@@ -852,7 +852,7 @@ static int __maybe_unused ov2740_suspend(struct device *dev)
 	return 0;
 }
 
-static int __maybe_unused ov2740_resume(struct device *dev)
+static int ov2740_resume(struct device *dev)
 {
 	struct v4l2_subdev *sd = dev_get_drvdata(dev);
 	struct ov2740 *ov2740 = to_ov2740(sd);
@@ -1229,9 +1229,7 @@ static int ov2740_probe(struct i2c_client *client)
 	return ret;
 }
 
-static const struct dev_pm_ops ov2740_pm_ops = {
-	SET_SYSTEM_SLEEP_PM_OPS(ov2740_suspend, ov2740_resume)
-};
+static DEFINE_SIMPLE_DEV_PM_OPS(ov2740_pm_ops, ov2740_suspend, ov2740_resume);
 
 static const struct acpi_device_id ov2740_acpi_ids[] = {
 	{"INT3474"},
@@ -1243,7 +1241,7 @@ MODULE_DEVICE_TABLE(acpi, ov2740_acpi_ids);
 static struct i2c_driver ov2740_i2c_driver = {
 	.driver = {
 		.name = "ov2740",
-		.pm = &ov2740_pm_ops,
+		.pm = pm_sleep_ptr(&ov2740_pm_ops),
 		.acpi_match_table = ov2740_acpi_ids,
 	},
 	.probe_new = ov2740_probe,
-- 
2.35.1