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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/types.h>
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#include <linux/cdev.h>
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#include <linux/slab.h>
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#include <linux/sysfs.h>
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static ssize_t test_request_show(struct device *dev, struct device_attribute *attr, char *buf) {
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test_dev_t *test = dev_get_drvdata(dev);
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return sprintf(buf, "%lx\n", test->addr);
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static ssize_t test_request_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) {
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test_dev_t *test = dev_get_drvdata(dev);
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if (sscanf(buf, "%lx", &ua) != 1) {
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mod_info("Error processing request\n");
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test->addr = pcidriver_resolve_bar(ua);
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static DEVICE_ATTR(test_request, 0664, test_request_show, test_request_store);
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int test_sysfs_init(test_dev_t *dev) {
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err = device_create_file(dev->dev, &dev_attr_test_request);
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void test_sysfs_free(test_dev_t *dev) {
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device_remove_file(dev->dev, &dev_attr_test_request);