mirror of https://github.com/dynup/kpatch
45 lines
906 B
C
45 lines
906 B
C
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#define pr_fmt(fmt) "testmod: " fmt
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/kobject.h>
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#include <linux/sysfs.h>
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static struct kobject *testmod_kobj;
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int value = 2;
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static ssize_t value_show(struct kobject *kobj,
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struct kobj_attribute *attr, char *buf)
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{
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return sprintf(buf, "%d\n", value);
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}
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static struct kobj_attribute testmod_value_attr = __ATTR_RO(value);
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static int testmod_init(void)
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{
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int ret;
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testmod_kobj = kobject_create_and_add("testmod", kernel_kobj);
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if (!testmod_kobj)
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return -ENOMEM;
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ret = sysfs_create_file(testmod_kobj, &testmod_value_attr.attr);
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if (ret) {
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kobject_put(testmod_kobj);
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return ret;
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}
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return 0;
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}
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static void testmod_exit(void)
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{
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sysfs_remove_file(testmod_kobj, &testmod_value_attr.attr);
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kobject_put(testmod_kobj);
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}
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module_init(testmod_init);
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module_exit(testmod_exit);
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MODULE_LICENSE("GPL");
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