ata: pata_falcon: Stop using module_platform_driver_probe()

On today's platforms the benefit of platform_driver_probe() isn't that
relevant any more. It allows to drop some code after booting (or module
loading) for .probe() and discard the .remove() function completely if
the driver is built-in. This typically saves a few 100k.

The downside of platform_driver_probe() is that the driver cannot be
bound and unbound at runtime which is ancient and so slightly
complicates testing. There are also thoughts to deprecate
platform_driver_probe() because it adds some complexity in the driver
core for little gain. Also many drivers don't use it correctly. This
driver for example misses to mark the driver struct with __ref which is
needed to suppress a (W=1) modpost warning.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Reviewed-by: Niklas Cassel <niklas.cassel@wdc.com>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>

diff --git a/drivers/ata/pata_falcon.c b/drivers/ata/pata_falcon.c
index 0c2ae43..9dfc2df 100644 (file)
--- a/drivers/ata/pata_falcon.c
+++ b/drivers/ata/pata_falcon.c
@@ -121,7 +121,7 @@ static struct ata_port_operations pata_falcon_ops = {
        .set_mode       = pata_falcon_set_mode,
 };
 
-static int __init pata_falcon_init_one(struct platform_device *pdev)
+static int pata_falcon_init_one(struct platform_device *pdev)
 {
        struct resource *base_mem_res, *ctl_mem_res;
        struct resource *base_res, *ctl_res, *irq_res;
@@ -216,7 +216,7 @@ static int __init pata_falcon_init_one(struct platform_device *pdev)
                                 IRQF_SHARED, &pata_falcon_sht);
 }
 
-static int __exit pata_falcon_remove_one(struct platform_device *pdev)
+static int pata_falcon_remove_one(struct platform_device *pdev)
 {
        struct ata_host *host = platform_get_drvdata(pdev);
 
@@ -226,13 +226,14 @@ static int __exit pata_falcon_remove_one(struct platform_device *pdev)
 }
 
 static struct platform_driver pata_falcon_driver = {
-       .remove = __exit_p(pata_falcon_remove_one),
+       .probe = pata_falcon_init_one,
+       .remove = pata_falcon_remove_one,
        .driver   = {
                .name   = "atari-falcon-ide",
        },
 };
 
-module_platform_driver_probe(pata_falcon_driver, pata_falcon_init_one);
+module_platform_driver(pata_falcon_driver);
 
 MODULE_AUTHOR("Bartlomiej Zolnierkiewicz");
 MODULE_DESCRIPTION("low-level driver for Atari Falcon PATA");