Now that the driver core allows for struct class to be in read-only memory, making all 'class' structures to be declared at build time placing them into read-only memory, instead of having to be dynamically allocated at load time.
Cc: Johan Hovold johan@kernel.org Cc: Alex Elder elder@kernel.org Cc: greybus-dev@lists.linaro.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/staging/greybus/authentication.c | 19 +++++++++++-------- 1 file changed, 11 insertions(+), 8 deletions(-)
diff --git a/drivers/staging/greybus/authentication.c b/drivers/staging/greybus/authentication.c index 7e01790a4659..b67315641d18 100644 --- a/drivers/staging/greybus/authentication.c +++ b/drivers/staging/greybus/authentication.c @@ -36,7 +36,10 @@ struct gb_cap { dev_t dev_num; };
-static struct class *cap_class; +static const struct class cap_class = { + .name = "gb_authenticate", +}; + static dev_t cap_dev_num; static DEFINE_IDA(cap_minors_map); static LIST_HEAD(cap_list); @@ -336,7 +339,7 @@ int gb_cap_connection_init(struct gb_connection *connection) goto err_remove_ida;
/* Add a soft link to the previously added char-dev within the bundle */ - cap->class_device = device_create(cap_class, cap->parent, cap->dev_num, + cap->class_device = device_create(&cap_class, cap->parent, cap->dev_num, NULL, "gb-authenticate-%d", minor); if (IS_ERR(cap->class_device)) { ret = PTR_ERR(cap->class_device); @@ -370,7 +373,7 @@ void gb_cap_connection_exit(struct gb_connection *connection)
cap = gb_connection_get_data(connection);
- device_destroy(cap_class, cap->dev_num); + device_destroy(&cap_class, cap->dev_num); cdev_del(&cap->cdev); ida_simple_remove(&cap_minors_map, MINOR(cap->dev_num));
@@ -402,9 +405,9 @@ int cap_init(void) { int ret;
- cap_class = class_create("gb_authenticate"); - if (IS_ERR(cap_class)) - return PTR_ERR(cap_class); + ret = class_register(&cap_class); + if (ret) + return ret;
ret = alloc_chrdev_region(&cap_dev_num, 0, NUM_MINORS, "gb_authenticate"); @@ -414,13 +417,13 @@ int cap_init(void) return 0;
err_remove_class: - class_destroy(cap_class); + class_unregister(&cap_class); return ret; }
void cap_exit(void) { unregister_chrdev_region(cap_dev_num, NUM_MINORS); - class_destroy(cap_class); + class_unregister(&cap_class); ida_destroy(&cap_minors_map); }