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PCI: switchtec: Make switchtec_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.

Link: https://lore.kernel.org/r/2024061053-online-unwound-b173@gregkh
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-By: Logan Gunthorpe <logang@deltatee.com>
Cc: Kurt Schwemmer <kurt.schwemmer@microsemi.com>
Cc: Jon Mason <jdmason@kudzu.us>
Cc: Allen Hubbe <allenbh@gmail.com>
This commit is contained in:
Greg Kroah-Hartman 2024-06-10 10:20:53 +02:00 committed by Bjorn Helgaas
parent 1613e604df
commit 8a74e4eaa7
3 changed files with 10 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/ntb/hw/mscc/ntb_hw_switchtec.c
View File

@ -1565,7 +1565,7 @@ static struct class_interface switchtec_interface = {
static int __init switchtec_ntb_init(void)
{
switchtec_interface.class = switchtec_class;
switchtec_interface.class = &switchtec_class;
return class_interface_register(&switchtec_interface);
}
module_init(switchtec_ntb_init);

16
drivers/pci/switch/switchtec.c
View File

@ -37,7 +37,9 @@ MODULE_PARM_DESC(nirqs, "number of interrupts to allocate (more may be useful fo
static dev_t switchtec_devt;
static DEFINE_IDA(switchtec_minor_ida);
struct class *switchtec_class;
const struct class switchtec_class = {
.name = "switchtec",
};
EXPORT_SYMBOL_GPL(switchtec_class);
enum mrpc_state {
@ -1363,7 +1365,7 @@ static struct switchtec_dev *stdev_create(struct pci_dev *pdev)
dev = &stdev->dev;
device_initialize(dev);
dev->class = switchtec_class;
dev->class = &switchtec_class;
dev->parent = &pdev->dev;
dev->groups = switchtec_device_groups;
dev->release = stdev_release;
@ -1851,11 +1853,9 @@ static int __init switchtec_init(void)
if (rc)
return rc;
switchtec_class = class_create("switchtec");
if (IS_ERR(switchtec_class)) {
rc = PTR_ERR(switchtec_class);
rc = class_register(&switchtec_class);
if (rc)
goto err_create_class;
}
rc = pci_register_driver(&switchtec_pci_driver);
if (rc)
@ -1866,7 +1866,7 @@ static int __init switchtec_init(void)
return 0;
err_pci_register:
class_destroy(switchtec_class);
class_unregister(&switchtec_class);
err_create_class:
unregister_chrdev_region(switchtec_devt, max_devices);
@ -1878,7 +1878,7 @@ module_init(switchtec_init);
static void __exit switchtec_exit(void)
{
pci_unregister_driver(&switchtec_pci_driver);
class_destroy(switchtec_class);
class_unregister(&switchtec_class);
unregister_chrdev_region(switchtec_devt, max_devices);
ida_destroy(&switchtec_minor_ida);

2
include/linux/switchtec.h
View File

@ -521,6 +521,6 @@ static inline struct switchtec_dev *to_stdev(struct device *dev)
return container_of(dev, struct switchtec_dev, dev);
}
extern struct class *switchtec_class;
extern const struct class switchtec_class;
#endif