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Drop the deprecated init_module() and cleanup_module()

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This commit is contained in:
Jim Huang 2021-08-08 00:29:24 +08:00
parent a26d93037e
commit d43259c553
12 changed files with 70 additions and 70 deletions
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13
examples/bottomhalf.c
View File

@ -22,8 +22,10 @@ static struct gpio leds[] = {{4, GPIOF_OUT_INIT_LOW, "LED 1"}};
/* Define GPIOs for BUTTONS
Change the numbers for the GPIO on your board. */
static struct gpio buttons[] = {{17, GPIOF_IN, "LED 1 ON BUTTON"},
{18, GPIOF_IN, "LED 1 OFF BUTTON"}};
static struct gpio buttons[] = {
{17, GPIOF_IN, "LED 1 ON BUTTON"},
{18, GPIOF_IN, "LED 1 OFF BUTTON"},
};
/* Tasklet containing some non-trivial amount of processing */
static void bottomhalf_tasklet_fn(unsigned long data)
@ -53,7 +55,7 @@ static irqreturn_t button_isr(int irq, void *data)
return IRQ_HANDLED;
}
int init_module()
static int __init bottomhalf_init(void)
{
int ret = 0;
@ -133,7 +135,7 @@ fail1:
return ret;
}
void cleanup_module()
static void __exit bottomhalf_exit(void)
{
int i;
@ -152,5 +154,8 @@ void cleanup_module()
gpio_free_array(buttons, ARRAY_SIZE(buttons));
}
module_init(bottomhalf_init);
module_exit(bottomhalf_exit);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Interrupt with top and bottom half");

9
examples/chardev.c
View File

@ -40,8 +40,7 @@ static struct file_operations chardev_fops = {
.release = device_release,
};
/* This function is called when the module is loaded. */
int init_module(void)
static int __init chardev_init(void)
{
major = register_chrdev(0, DEVICE_NAME, &chardev_fops);
@ -60,8 +59,7 @@ int init_module(void)
return SUCCESS;
}
/* This function is called when the module is unloaded. */
void cleanup_module(void)
static void __exit chardev_exit(void)
{
device_destroy(cls, MKDEV(major, 0));
class_destroy(cls);
@ -145,4 +143,7 @@ static ssize_t device_write(struct file *filp,
return -EINVAL;
}
module_init(chardev_init);
module_exit(chardev_exit);
MODULE_LICENSE("GPL");

32
examples/chardev2.c
View File

@ -8,7 +8,7 @@
#include <linux/fs.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/kernel.h> /* We're doing kernel work */
#include <linux/kernel.h> /* We are doing kernel work */
#include <linux/module.h> /* Specifically, a module */
#include <linux/poll.h>
@ -229,20 +229,13 @@ struct file_operations Fops = {
.release = device_release, /* a.k.a. close */
};
/*
* Initialize the module - Register the character device
*/
int init_module()
/* Initialize the module - Register the character device */
static int __init chardev2_init(void)
{
int ret_val;
/*
* Register the character device (atleast try)
*/
ret_val = register_chrdev(MAJOR_NUM, DEVICE_NAME, &Fops);
/* Register the character device (atleast try) */
int ret_val = register_chrdev(MAJOR_NUM, DEVICE_NAME, &Fops);
/*
* Negative values signify an error
*/
/* Negative values signify an error */
if (ret_val < 0) {
pr_alert("%s failed with %d\n",
"Sorry, registering the character device ", ret_val);
@ -259,18 +252,17 @@ int init_module()
return 0;
}
/*
* Cleanup - unregister the appropriate file from /proc
*/
void cleanup_module()
/* Cleanup - unregister the appropriate file from /proc */
static void __exit chardev2_exit(void)
{
device_destroy(cls, MKDEV(Major, 0));
class_destroy(cls);
/*
* Unregister the device
*/
/* Unregister the device */
unregister_chrdev(Major, DEVICE_NAME);
}
module_init(chardev2_init);
module_exit(chardev2_exit);
MODULE_LICENSE("GPL");

6
examples/devicemodel.c
View File

@ -92,8 +92,8 @@ static void devicemodel_exit(void)
platform_driver_unregister(&devicemodel_driver);
}
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Linux Device Model example");
module_init(devicemodel_init);
module_exit(devicemodel_exit);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Linux Device Model example");

4
examples/hello-1.c
View File

@ -8,9 +8,7 @@ int init_module(void)
{
pr_info("Hello world 1.\n");
/*
* A non 0 return means init_module failed; module can't be loaded.
*/
/* A non 0 return means init_module failed; module can't be loaded. */
return 0;
}

7
examples/intrpt.c
View File

@ -39,7 +39,7 @@ static irqreturn_t button_isr(int irq, void *data)
return IRQ_HANDLED;
}
int init_module()
static int __init intrpt_init(void)
{
int ret = 0;
@ -119,7 +119,7 @@ fail1:
return ret;
}
void cleanup_module()
static void __exit intrpt_exit(void)
{
int i;
@ -138,5 +138,8 @@ void cleanup_module()
gpio_free_array(buttons, ARRAY_SIZE(buttons));
}
module_init(intrpt_init);
module_exit(intrpt_exit);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Handle some GPIO interrupts");

7
examples/procfs1.c
View File

@ -47,7 +47,7 @@ static const struct file_operations proc_file_fops = {
};
#endif
int init_module()
static int __init procfs1_init(void)
{
Our_Proc_File = proc_create(procfs_name, 0644, NULL, &proc_file_fops);
if (NULL == Our_Proc_File) {
@ -60,10 +60,13 @@ int init_module()
return 0;
}
void cleanup_module()
static void __exit procfs1_exit(void)
{
proc_remove(Our_Proc_File);
pr_info("/proc/%s removed\n", procfs_name);
}
module_init(procfs1_init);
module_exit(procfs1_exit);
MODULE_LICENSE("GPL");

15
examples/procfs2.c
View File

@ -90,11 +90,7 @@ static const struct file_operations proc_file_fops = {
};
#endif
/**
*This function is called when the module is loaded
*
*/
int init_module()
static int __init procfs2_init(void)
{
Our_Proc_File = proc_create(PROCFS_NAME, 0644, NULL, &proc_file_fops);
if (NULL == Our_Proc_File) {
@ -107,14 +103,13 @@ int init_module()
return 0;
}
/**
*This function is called when the module is unloaded
*
*/
void cleanup_module()
static void __exit procfs2_exit(void)
{
proc_remove(Our_Proc_File);
pr_info("/proc/%s removed\n", PROCFS_NAME);
}
module_init(procfs2_init);
module_exit(procfs2_exit);
MODULE_LICENSE("GPL");

8
examples/procfs3.c
View File

@ -78,7 +78,7 @@ static const struct file_operations File_Ops_4_Our_Proc_File = {
};
#endif
int init_module()
static int __init procfs3_init(void)
{
Our_Proc_File = proc_create(PROCFS_ENTRY_FILENAME, 0644, NULL,
&File_Ops_4_Our_Proc_File);
@ -94,10 +94,14 @@ int init_module()
pr_debug("/proc/%s created\n", PROCFS_ENTRY_FILENAME);
return 0;
}
void cleanup_module()
static void __exit procfs3_exit(void)
{
remove_proc_entry(PROCFS_ENTRY_FILENAME, NULL);
pr_debug("/proc/%s removed\n", PROCFS_ENTRY_FILENAME);
}
module_init(procfs3_init);
module_exit(procfs3_exit);
MODULE_LICENSE("GPL");

13
examples/procfs4.c
View File

@ -15,8 +15,6 @@
#define PROC_NAME "iter"
MODULE_LICENSE("GPL");
/* This function is called at the beginning of a sequence.
* ie, when:
* - the /proc file is read (first time)
@ -93,8 +91,7 @@ static const struct file_operations my_file_ops = {
};
#endif
/* This function is called when the module is loaded. */
int init_module(void)
static int __init procfs4_init(void)
{
struct proc_dir_entry *entry;
@ -108,9 +105,13 @@ int init_module(void)
return 0;
}
/* This function is called when the module is unloaded. */
void cleanup_module(void)
static void __exit procfs4_exit(void)
{
remove_proc_entry(PROC_NAME, NULL);
pr_debug("/proc/%s removed\n", PROC_NAME);
}
module_init(procfs4_init);
module_exit(procfs4_exit);
MODULE_LICENSE("GPL");

7
examples/sched.c
View File

@ -13,7 +13,7 @@ static void work_handler(struct work_struct *data)
pr_info("work handler function.\n");
}
int init_module()
static int __init sched_init(void)
{
queue = alloc_workqueue("HELLOWORLD", WQ_UNBOUND, 1);
INIT_WORK(&work, work_handler);
@ -22,10 +22,13 @@ int init_module()
return 0;
}
void cleanup_module()
static void __exit sched_exit(void)
{
destroy_workqueue(queue);
}
module_init(sched_init);
module_exit(sched_exit);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Workqueue example");

19
examples/sleep.c
View File

@ -240,15 +240,8 @@ static const struct file_operations File_Ops_4_Our_Proc_File = {
};
#endif
/*
* Module initialization and cleanup
*/
/*
* Initialize the module - register the proc file
*/
int init_module()
/* Initialize the module - register the proc file */
static int __init sleep_init(void)
{
Our_Proc_File =
proc_create(PROC_ENTRY_FILENAME, 0644, NULL, &File_Ops_4_Our_Proc_File);
@ -265,16 +258,18 @@ int init_module()
return 0;
}
/*
* Cleanup - unregister our file from /proc. This could get dangerous if
/* Cleanup - unregister our file from /proc. This could get dangerous if
* there are still processes waiting in WaitQ, because they are inside our
* open function, which will get unloaded. I'll explain how to avoid removal
* of a kernel module in such a case in chapter 10.
*/
void cleanup_module()
static void __exit sleep_exit(void)
{
remove_proc_entry(PROC_ENTRY_FILENAME, NULL);
pr_debug("/proc/%s removed\n", PROC_ENTRY_FILENAME);
}
module_init(sleep_init);
module_exit(sleep_exit);
MODULE_LICENSE("GPL");