linux-kernel - [PATCH 3/6] mfd: ab8500-debugfs: Make it explicitly non-modular

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Date:   Sat, 29 Oct 2016 21:24:37 -0400
From:   Paul Gortmaker <paul.gortmaker@...driver.com>
To:     <linux-kernel@...r.kernel.org>
CC:     Paul Gortmaker <paul.gortmaker@...driver.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Samuel Ortiz <sameo@...ux.intel.com>,
        Lee Jones <lee.jones@...aro.org>
Subject: [PATCH 3/6] mfd: ab8500-debugfs: Make it explicitly non-modular

The Kconfig currently controlling compilation of this code is:

drivers/mfd/Kconfig:config AB8500_DEBUG
drivers/mfd/Kconfig:       bool "Enable debug info via debugfs"

...meaning that it currently is not being built as a module by anyone.

Lets remove the modular code that is essentially orphaned, so that
when reading the driver there is no doubt it is builtin-only.

We explicitly disallow a driver unbind, since that doesn't have a
sensible use case anyway, and it allows us to drop the ".remove"
code for non-modular drivers.

Since module_init was not in use by this code, the init ordering
remains unchanged with this commit.

We also delete the MODULE_LICENSE tag etc. since all that information
is already contained at the top of the file in the comments.

Cc: Linus Walleij <linus.walleij@...aro.org>
Cc: Samuel Ortiz <sameo@...ux.intel.com>
Cc: Lee Jones <lee.jones@...aro.org>
Signed-off-by: Paul Gortmaker <paul.gortmaker@...driver.com>
---
 drivers/mfd/ab8500-debugfs.c | 21 ++-------------------
 1 file changed, 2 insertions(+), 19 deletions(-)

diff --git a/drivers/mfd/ab8500-debugfs.c b/drivers/mfd/ab8500-debugfs.c
index acf6c00b14b9..c1c815241e02 100644
--- a/drivers/mfd/ab8500-debugfs.c
+++ b/drivers/mfd/ab8500-debugfs.c
@@ -74,7 +74,7 @@
 #include <linux/seq_file.h>
 #include <linux/uaccess.h>
 #include <linux/fs.h>
-#include <linux/module.h>
+#include <linux/init.h>
 #include <linux/debugfs.h>
 #include <linux/platform_device.h>
 #include <linux/interrupt.h>
@@ -3234,33 +3234,16 @@ static int ab8500_debug_probe(struct platform_device *plf)
 	return -ENOMEM;
 }
 
-static int ab8500_debug_remove(struct platform_device *plf)
-{
-	debugfs_remove_recursive(ab8500_dir);
-
-	return 0;
-}
-
 static struct platform_driver ab8500_debug_driver = {
 	.driver = {
 		.name = "ab8500-debug",
+		.suppress_bind_attrs = true,
 	},
 	.probe  = ab8500_debug_probe,
-	.remove = ab8500_debug_remove
 };
 
 static int __init ab8500_debug_init(void)
 {
 	return platform_driver_register(&ab8500_debug_driver);
 }
-
-static void __exit ab8500_debug_exit(void)
-{
-	platform_driver_unregister(&ab8500_debug_driver);
-}
 subsys_initcall(ab8500_debug_init);
-module_exit(ab8500_debug_exit);
-
-MODULE_AUTHOR("Mattias WALLIN <mattias.wallin@...ricsson.com");
-MODULE_DESCRIPTION("AB8500 DEBUG");
-MODULE_LICENSE("GPL v2");
-- 
2.10.1