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i2c: dev: make i2c_dev_class a static const structure

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Now that the driver core allows for struct class to be in read-only
memory, move the i2c_dev_class structure to be declared at build time
placing it into read-only memory, instead of having to be dynamically
allocated at boot time.

Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ivan Orlov <ivan.orlov0322@gmail.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
This commit is contained in:
Ivan Orlov 2023-08-10 21:46:18 +04:00 committed by Wolfram Sang
parent bcfaaa9711
commit cdb55bdb50
1 changed files with 9 additions and 9 deletions
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18
drivers/i2c/i2c-dev.c
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@ -636,7 +636,10 @@ static const struct file_operations i2cdev_fops = {
/* ------------------------------------------------------------------------- */
static struct class *i2c_dev_class;
static const struct class i2c_dev_class = {
.name = "i2c-dev",
.dev_groups = i2c_groups,
};
static void i2cdev_dev_release(struct device *dev)
{
@ -665,7 +668,7 @@ static int i2cdev_attach_adapter(struct device *dev)
device_initialize(&i2c_dev->dev);
i2c_dev->dev.devt = MKDEV(I2C_MAJOR, adap->nr);
i2c_dev->dev.class = i2c_dev_class;
i2c_dev->dev.class = &i2c_dev_class;
i2c_dev->dev.parent = &adap->dev;
i2c_dev->dev.release = i2cdev_dev_release;
@ -751,12 +754,9 @@ static int __init i2c_dev_init(void)
if (res)
goto out;
i2c_dev_class = class_create("i2c-dev");
if (IS_ERR(i2c_dev_class)) {
res = PTR_ERR(i2c_dev_class);
res = class_register(&i2c_dev_class);
if (res)
goto out_unreg_chrdev;
}
i2c_dev_class->dev_groups = i2c_groups;
/* Keep track of adapters which will be added or removed later */
res = bus_register_notifier(&i2c_bus_type, &i2cdev_notifier);
@ -769,7 +769,7 @@ static int __init i2c_dev_init(void)
return 0;
out_unreg_class:
class_destroy(i2c_dev_class);
class_unregister(&i2c_dev_class);
out_unreg_chrdev:
unregister_chrdev_region(MKDEV(I2C_MAJOR, 0), I2C_MINORS);
out:
@ -781,7 +781,7 @@ static void __exit i2c_dev_exit(void)
{
bus_unregister_notifier(&i2c_bus_type, &i2cdev_notifier);
i2c_for_each_dev(NULL, i2c_dev_detach_adapter);
class_destroy(i2c_dev_class);
class_unregister(&i2c_dev_class);
unregister_chrdev_region(MKDEV(I2C_MAJOR, 0), I2C_MINORS);
}