linux-kernel - [PATCH 3/3] memory: emif: Drop usage of platform_driver

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Message-ID:  <af2931bbb536349a1f9ca637b5aa1094bc354dcc.1702829744.git.u.kleine-koenig@pengutronix.de>
Date: Sun, 17 Dec 2023 20:31:33 +0100
From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To: Santosh Shilimkar <ssantosh@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc: kernel@...gutronix.de,
	linux-kernel@...r.kernel.org
Subject: [PATCH 3/3] memory: emif: Drop usage of platform_driver_probe()

There are considerations to drop platform_driver_probe() as a concept
that isn't relevant any more today. It comes with an added complexity
that makes many users hold it wrong. (E.g. this driver should have
better used __init instead of __init_or_module to mark functions only
relevant to .probe() and mark the driver struct with __refdata.)

This fixes a W=1 build warning:

	WARNING: modpost: drivers/memory/emif: section mismatch in reference: emif_driver+0x4 (section: .data) -> emif_remove (section: .exit.text)

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
---
 drivers/memory/emif.c | 23 ++++++++++++-----------
 1 file changed, 12 insertions(+), 11 deletions(-)

diff --git a/drivers/memory/emif.c b/drivers/memory/emif.c
index 5a3194b9b3bc..84973d7133f4 100644
--- a/drivers/memory/emif.c
+++ b/drivers/memory/emif.c
@@ -139,7 +139,7 @@ static int emif_mr4_show(struct seq_file *s, void *unused)
 
 DEFINE_SHOW_ATTRIBUTE(emif_mr4);
 
-static void __init_or_module emif_debugfs_init(struct emif_data *emif)
+static void emif_debugfs_init(struct emif_data *emif)
 {
 	if (IS_ENABLED(CONFIG_DEBUG_FS)) {
 		emif->debugfs_root = debugfs_create_dir(dev_name(emif->dev), NULL);
@@ -150,7 +150,7 @@ static void __init_or_module emif_debugfs_init(struct emif_data *emif)
 	}
 }
 
-static void __exit emif_debugfs_exit(struct emif_data *emif)
+static void emif_debugfs_exit(struct emif_data *emif)
 {
 	if (IS_ENABLED(CONFIG_DEBUG_FS)) {
 		debugfs_remove_recursive(emif->debugfs_root);
@@ -671,7 +671,7 @@ static void disable_and_clear_all_interrupts(struct emif_data *emif)
 	clear_all_interrupts(emif);
 }
 
-static int __init_or_module setup_interrupts(struct emif_data *emif, u32 irq)
+static int setup_interrupts(struct emif_data *emif, u32 irq)
 {
 	u32		interrupts, type;
 	void __iomem	*base = emif->base;
@@ -702,7 +702,7 @@ static int __init_or_module setup_interrupts(struct emif_data *emif, u32 irq)
 
 }
 
-static void __init_or_module emif_onetime_settings(struct emif_data *emif)
+static void emif_onetime_settings(struct emif_data *emif)
 {
 	u32				pwr_mgmt_ctrl, zq, temp_alert_cfg;
 	void __iomem			*base = emif->base;
@@ -826,7 +826,7 @@ static int is_custom_config_valid(struct emif_custom_configs *cust_cfgs,
 	return valid;
 }
 
-static void __init_or_module of_get_custom_configs(struct device_node *np_emif,
+static void of_get_custom_configs(struct device_node *np_emif,
 		struct emif_data *emif)
 {
 	struct emif_custom_configs	*cust_cfgs = NULL;
@@ -875,7 +875,7 @@ static void __init_or_module of_get_custom_configs(struct device_node *np_emif,
 	emif->plat_data->custom_configs = cust_cfgs;
 }
 
-static void __init_or_module of_get_ddr_info(struct device_node *np_emif,
+static void of_get_ddr_info(struct device_node *np_emif,
 		struct device_node *np_ddr,
 		struct ddr_device_info *dev_info)
 {
@@ -909,7 +909,7 @@ static void __init_or_module of_get_ddr_info(struct device_node *np_emif,
 		dev_info->io_width = __fls(io_width) - 1;
 }
 
-static struct emif_data * __init_or_module of_get_memory_device_details(
+static struct emif_data *of_get_memory_device_details(
 		struct device_node *np_emif, struct device *dev)
 {
 	struct emif_data		*emif = NULL;
@@ -1086,7 +1086,7 @@ static struct emif_data *__init_or_module get_device_details(
 	return NULL;
 }
 
-static int __init_or_module emif_probe(struct platform_device *pdev)
+static int emif_probe(struct platform_device *pdev)
 {
 	struct emif_data	*emif;
 	int			irq, ret;
@@ -1141,7 +1141,7 @@ static int __init_or_module emif_probe(struct platform_device *pdev)
 	return -ENODEV;
 }
 
-static int __exit emif_remove(struct platform_device *pdev)
+static int emif_remove(struct platform_device *pdev)
 {
 	struct emif_data *emif = platform_get_drvdata(pdev);
 
@@ -1167,7 +1167,8 @@ MODULE_DEVICE_TABLE(of, emif_of_match);
 #endif
 
 static struct platform_driver emif_driver = {
-	.remove		= __exit_p(emif_remove),
+	.probe		= emif_probe,
+	.remove		= emif_remove,
 	.shutdown	= emif_shutdown,
 	.driver = {
 		.name = "emif",
@@ -1175,7 +1176,7 @@ static struct platform_driver emif_driver = {
 	},
 };
 
-module_platform_driver_probe(emif_driver, emif_probe);
+module_platform_driver(emif_driver);
 
 MODULE_DESCRIPTION("TI EMIF SDRAM Controller Driver");
 MODULE_LICENSE("GPL");
-- 
2.42.0