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uacce: make uacce_class constant

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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 <wangzhou1@hisilicon.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: linux-accelerators@lists.ozlabs.org
Tested-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Link: https://lore.kernel.org/r/2023102458-designate-vicinity-4c86@gregkh
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman 2023-10-24 13:49:59 +02:00
parent cf3c415d7d
commit 40ea89fb19
1 changed files with 10 additions and 7 deletions
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17
drivers/misc/uacce/uacce.c
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@ -7,10 +7,13 @@
#include <linux/slab.h>
#include <linux/uacce.h>
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);