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| author | Ivan Orlov <ivan.orlov0322@gmail.com> | 2023-06-20 16:37:57 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-06-23 10:27:17 +0200 |
| commit | 98ab58a7a0b08be3f5ebdcb44fdf49127f749970 (patch) | |
| tree | 10e0ef7b43bd01379deefdbcb89b6f7a57bab1da | |
| parent | eafd52e6971ab63dd9294df1e363951148f292cf (diff) | |
| download | linux-98ab58a7a0b08be3f5ebdcb44fdf49127f749970.tar.gz linux-98ab58a7a0b08be3f5ebdcb44fdf49127f749970.tar.bz2 linux-98ab58a7a0b08be3f5ebdcb44fdf49127f749970.zip | |
ppdev: make ppdev_class a static const structure
Now that the driver core allows for struct class to be in read-only
memory, move the ppdev_class structure to be declared at build time
placing it into read-only memory, instead of having to be dynamically
allocated at load time.
Cc: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ivan Orlov <ivan.orlov0322@gmail.com>
Link: https://lore.kernel.org/r/20230620143751.578239-15-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/char/ppdev.c | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/drivers/char/ppdev.c b/drivers/char/ppdev.c index 81ed58157b15..4c188e9e477c 100644 --- a/drivers/char/ppdev.c +++ b/drivers/char/ppdev.c @@ -773,7 +773,9 @@ static __poll_t pp_poll(struct file *file, poll_table *wait) return mask; } -static struct class *ppdev_class; +static const struct class ppdev_class = { + .name = CHRDEV, +}; static const struct file_operations pp_fops = { .owner = THIS_MODULE, @@ -794,7 +796,7 @@ static void pp_attach(struct parport *port) if (devices[port->number]) return; - ret = device_create(ppdev_class, port->dev, + ret = device_create(&ppdev_class, port->dev, MKDEV(PP_MAJOR, port->number), NULL, "parport%d", port->number); if (IS_ERR(ret)) { @@ -810,7 +812,7 @@ static void pp_detach(struct parport *port) if (!devices[port->number]) return; - device_destroy(ppdev_class, MKDEV(PP_MAJOR, port->number)); + device_destroy(&ppdev_class, MKDEV(PP_MAJOR, port->number)); devices[port->number] = NULL; } @@ -841,11 +843,10 @@ static int __init ppdev_init(void) pr_warn(CHRDEV ": unable to get major %d\n", PP_MAJOR); return -EIO; } - ppdev_class = class_create(CHRDEV); - if (IS_ERR(ppdev_class)) { - err = PTR_ERR(ppdev_class); + err = class_register(&ppdev_class); + if (err) goto out_chrdev; - } + err = parport_register_driver(&pp_driver); if (err < 0) { pr_warn(CHRDEV ": unable to register with parport\n"); @@ -856,7 +857,7 @@ static int __init ppdev_init(void) goto out; out_class: - class_destroy(ppdev_class); + class_unregister(&ppdev_class); out_chrdev: unregister_chrdev(PP_MAJOR, CHRDEV); out: @@ -867,7 +868,7 @@ static void __exit ppdev_cleanup(void) { /* Clean up all parport stuff */ parport_unregister_driver(&pp_driver); - class_destroy(ppdev_class); + class_unregister(&ppdev_class); unregister_chrdev(PP_MAJOR, CHRDEV); } |