diff options
| author | Ricardo B. Marliere <ricardo@marliere.net> | 2024-03-01 14:51:48 -0300 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2024-03-05 15:15:27 -0700 |
| commit | 626f534d774caaccd6861fbccee45a1a6a8781b3 (patch) | |
| tree | a8e3d08e002da4c88548d0f4a7198c3d0a63a15e /samples | |
| parent | 1f92d6a7c65f390617463532b408030a5a168097 (diff) | |
| download | linux-stable-626f534d774caaccd6861fbccee45a1a6a8781b3.tar.gz linux-stable-626f534d774caaccd6861fbccee45a1a6a8781b3.tar.bz2 linux-stable-626f534d774caaccd6861fbccee45a1a6a8781b3.zip | |
vfio/mbochs: make mbochs_class constant
Since commit 43a7206b0963 ("driver core: class: make class_register() take
a const *"), the driver core allows for struct class to be in read-only
memory, so move the mbochs_class structure to be declared at build time
placing it into read-only memory, instead of having to be dynamically
allocated at boot time.
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ricardo B. Marliere <ricardo@marliere.net>
Link: https://lore.kernel.org/r/20240301-class_cleanup-vfio-v1-2-9236d69083f5@marliere.net
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'samples')
| -rw-r--r-- | samples/vfio-mdev/mbochs.c | 18 |
1 files changed, 8 insertions, 10 deletions
diff --git a/samples/vfio-mdev/mbochs.c b/samples/vfio-mdev/mbochs.c index 93405264ff23..9062598ea03d 100644 --- a/samples/vfio-mdev/mbochs.c +++ b/samples/vfio-mdev/mbochs.c @@ -133,7 +133,9 @@ static struct mdev_type *mbochs_mdev_types[] = { }; static dev_t mbochs_devt; -static struct class *mbochs_class; +static const struct class mbochs_class = { + .name = MBOCHS_CLASS_NAME, +}; static struct cdev mbochs_cdev; static struct device mbochs_dev; static struct mdev_parent mbochs_parent; @@ -1422,13 +1424,10 @@ static int __init mbochs_dev_init(void) if (ret) goto err_cdev; - mbochs_class = class_create(MBOCHS_CLASS_NAME); - if (IS_ERR(mbochs_class)) { - pr_err("Error: failed to register mbochs_dev class\n"); - ret = PTR_ERR(mbochs_class); + ret = class_register(&mbochs_class); + if (ret) goto err_driver; - } - mbochs_dev.class = mbochs_class; + mbochs_dev.class = &mbochs_class; mbochs_dev.release = mbochs_device_release; dev_set_name(&mbochs_dev, "%s", MBOCHS_NAME); @@ -1448,7 +1447,7 @@ err_device: device_del(&mbochs_dev); err_put: put_device(&mbochs_dev); - class_destroy(mbochs_class); + class_unregister(&mbochs_class); err_driver: mdev_unregister_driver(&mbochs_driver); err_cdev: @@ -1466,8 +1465,7 @@ static void __exit mbochs_dev_exit(void) mdev_unregister_driver(&mbochs_driver); cdev_del(&mbochs_cdev); unregister_chrdev_region(mbochs_devt, MINORMASK + 1); - class_destroy(mbochs_class); - mbochs_class = NULL; + class_unregister(&mbochs_class); } MODULE_IMPORT_NS(DMA_BUF); |