From 40ea89fb19fdb73472f63a4b00c728ebb55af1b5 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Tue, 24 Oct 2023 13:49:59 +0200 Subject: uacce: make uacce_class constant Now that the driver core allows for struct class to be in read-only memory, we should make all 'class' structures declared at build time placing them into read-only memory, instead of having to be dynamically allocated at runtime. Cc: Zhou Wang Cc: Arnd Bergmann Cc: linux-accelerators@lists.ozlabs.org Tested-by: Zhangfei Gao Link: https://lore.kernel.org/r/2023102458-designate-vicinity-4c86@gregkh Signed-off-by: Greg Kroah-Hartman --- drivers/misc/uacce/uacce.c | 17 ++++++++++------- 1 file changed, 10 insertions(+), 7 deletions(-) (limited to 'drivers') diff --git a/drivers/misc/uacce/uacce.c b/drivers/misc/uacce/uacce.c index 930c252753a0..bdc2e6fda782 100644 --- a/drivers/misc/uacce/uacce.c +++ b/drivers/misc/uacce/uacce.c @@ -7,10 +7,13 @@ #include #include -static struct class *uacce_class; static dev_t uacce_devt; static DEFINE_XARRAY_ALLOC(uacce_xa); +static const struct class uacce_class = { + .name = UACCE_NAME, +}; + /* * If the parent driver or the device disappears, the queue state is invalid and * ops are not usable anymore. @@ -530,7 +533,7 @@ struct uacce_device *uacce_alloc(struct device *parent, mutex_init(&uacce->mutex); device_initialize(&uacce->dev); uacce->dev.devt = MKDEV(MAJOR(uacce_devt), uacce->dev_id); - uacce->dev.class = uacce_class; + uacce->dev.class = &uacce_class; uacce->dev.groups = uacce_dev_groups; uacce->dev.parent = uacce->parent; uacce->dev.release = uacce_release; @@ -623,13 +626,13 @@ static int __init uacce_init(void) { int ret; - uacce_class = class_create(UACCE_NAME); - if (IS_ERR(uacce_class)) - return PTR_ERR(uacce_class); + ret = class_register(&uacce_class); + if (ret) + return ret; ret = alloc_chrdev_region(&uacce_devt, 0, MINORMASK, UACCE_NAME); if (ret) - class_destroy(uacce_class); + class_unregister(&uacce_class); return ret; } @@ -637,7 +640,7 @@ static int __init uacce_init(void) static __exit void uacce_exit(void) { unregister_chrdev_region(uacce_devt, MINORMASK); - class_destroy(uacce_class); + class_unregister(&uacce_class); } subsys_initcall(uacce_init); -- cgit v1.2.3