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fpga: region: make fpga_region_class a static const structure

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Now that the driver core allows for struct class to be in read-only
memory, move the fpga_region_class structure to be declared at build
time placing it into read-only memory, instead of having to be
dynamically allocated at boot time.

Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ivan Orlov <ivan.orlov0322@gmail.com>
Acked-by: Xu Yilun <yilun.xu@intel.com>
Link: https://lore.kernel.org/r/20230811073043.52808-3-ivan.orlov0322@gmail.com
Signed-off-by: Xu Yilun <yilun.xu@intel.com>
This commit is contained in:
Ivan Orlov 2023-08-11 11:30:43 +04:00 • committed by Xu Yilun
parent 909960e2e2
commit 1a22ec09a2
No known key found for this signature in database
GPG key ID: FCB70381A4A08CDA
1 changed files with 11 additions and 12 deletions
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23
drivers/fpga/fpga-region.c
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@ -16,7 +16,7 @@
#include <linux/spinlock.h> #include <linux/spinlock.h>
static DEFINE_IDA(fpga_region_ida); static DEFINE_IDA(fpga_region_ida);
static struct class *fpga_region_class; static const struct class fpga_region_class;
struct fpga_region * struct fpga_region *
fpga_region_class_find(struct device *start, const void *data, fpga_region_class_find(struct device *start, const void *data,
@ -24,7 +24,7 @@ fpga_region_class_find(struct device *start, const void *data,
{ {
struct device *dev; struct device *dev;
dev = class_find_device(fpga_region_class, start, data, match); dev = class_find_device(&fpga_region_class, start, data, match);
if (!dev) if (!dev)
return NULL; return NULL;
@ -217,7 +217,7 @@ fpga_region_register_full(struct device *parent, const struct fpga_region_info *
mutex_init(&region->mutex); mutex_init(&region->mutex);
INIT_LIST_HEAD(&region->bridge_list); INIT_LIST_HEAD(&region->bridge_list);
region->dev.class = fpga_region_class; region->dev.class = &fpga_region_class;
region->dev.parent = parent; region->dev.parent = parent;
region->dev.of_node = parent->of_node; region->dev.of_node = parent->of_node;
region->dev.id = id; region->dev.id = id;
@ -288,6 +288,12 @@ static void fpga_region_dev_release(struct device *dev)
kfree(region); kfree(region);
} }
static const struct class fpga_region_class = {
.name = "fpga_region",
.dev_groups = fpga_region_groups,
.dev_release = fpga_region_dev_release,
};
/** /**
* fpga_region_init - creates the fpga_region class. * fpga_region_init - creates the fpga_region class.
* *
@ -295,19 +301,12 @@ static void fpga_region_dev_release(struct device *dev)
*/ */
static int __init fpga_region_init(void) static int __init fpga_region_init(void)
{ {
fpga_region_class = class_create("fpga_region"); return class_register(&fpga_region_class);
if (IS_ERR(fpga_region_class))
return PTR_ERR(fpga_region_class);
fpga_region_class->dev_groups = fpga_region_groups;
fpga_region_class->dev_release = fpga_region_dev_release;
return 0;
} }
static void __exit fpga_region_exit(void) static void __exit fpga_region_exit(void)
{ {
class_destroy(fpga_region_class); class_unregister(&fpga_region_class);
ida_destroy(&fpga_region_ida); ida_destroy(&fpga_region_ida);
} }