58 	struct fei_attr *attr;  in fei_attr_new()  local
60 	attr = kzalloc(sizeof(*attr), GFP_KERNEL);  in fei_attr_new()
61 	if (attr) {  in fei_attr_new()
62 		attr->kp.symbol_name = kstrdup(sym, GFP_KERNEL);  in fei_attr_new()
63 		if (!attr->kp.symbol_name) {  in fei_attr_new()
64 			kfree(attr);  in fei_attr_new()
67 		attr->kp.pre_handler = fei_kprobe_handler;  in fei_attr_new()
68 		attr->kp.post_handler = fei_post_handler;  in fei_attr_new()
69 		attr->retval = adjust_error_retval(addr, 0);  in fei_attr_new()
70 		INIT_LIST_HEAD(&attr->list);  in fei_attr_new()
72 	return attr;  in fei_attr_new()
75 static void fei_attr_free(struct fei_attr *attr)  in fei_attr_free()  argument
77 	if (attr) {  in fei_attr_free()
78 		kfree(attr->kp.symbol_name);  in fei_attr_free()
79 		kfree(attr);  in fei_attr_free()
85 	struct fei_attr *attr;  in fei_attr_lookup()  local
87 	list_for_each_entry(attr, &fei_attr_list, list) {  in fei_attr_lookup()
88 		if (!strcmp(attr->kp.symbol_name, sym))  in fei_attr_lookup()
89 			return attr;  in fei_attr_lookup()
97 	struct fei_attr *attr;  in fei_attr_is_valid()  local
99 	list_for_each_entry(attr, &fei_attr_list, list) {  in fei_attr_is_valid()
100 		if (attr == _attr)  in fei_attr_is_valid()
109 	struct fei_attr *attr = data;  in fei_retval_set()  local
119 	if (!fei_attr_is_valid(attr)) {  in fei_retval_set()
124 	if (attr->kp.addr) {  in fei_retval_set()
125 		if (adjust_error_retval((unsigned long)attr->kp.addr,  in fei_retval_set()
130 		attr->retval = val;  in fei_retval_set()
139 	struct fei_attr *attr = data;  in fei_retval_get()  local
144 	if (!fei_attr_is_valid(attr))  in fei_retval_get()
147 		*val = attr->retval;  in fei_retval_get()
155 static void fei_debugfs_add_attr(struct fei_attr *attr)  in fei_debugfs_add_attr()  argument
159 	dir = debugfs_create_dir(attr->kp.symbol_name, fei_debugfs_dir);  in fei_debugfs_add_attr()
161 	debugfs_create_file("retval", 0600, dir, attr, &fei_retval_ops);  in fei_debugfs_add_attr()
164 static void fei_debugfs_remove_attr(struct fei_attr *attr)  in fei_debugfs_remove_attr()  argument
166 	debugfs_lookup_and_remove(attr->kp.symbol_name, fei_debugfs_dir);  in fei_debugfs_remove_attr()
171 	struct fei_attr *attr = container_of(kp, struct fei_attr, kp);  in fei_kprobe_handler()  local
174 		regs_set_return_value(regs, attr->retval);  in fei_kprobe_handler()
201 	struct fei_attr *attr = list_entry(v, struct fei_attr, list);  in fei_seq_show()  local
203 	seq_printf(m, "%ps\n", attr->kp.addr);  in fei_seq_show()
219 static void fei_attr_remove(struct fei_attr *attr)  in fei_attr_remove()  argument
221 	fei_debugfs_remove_attr(attr);  in fei_attr_remove()
222 	unregister_kprobe(&attr->kp);  in fei_attr_remove()
223 	list_del(&attr->list);  in fei_attr_remove()
224 	fei_attr_free(attr);  in fei_attr_remove()
229 	struct fei_attr *attr, *n;  in fei_attr_remove_all()  local
231 	list_for_each_entry_safe(attr, n, &fei_attr_list, list) {  in fei_attr_remove_all()
232 		fei_attr_remove(attr);  in fei_attr_remove_all()
239 	struct fei_attr *attr;  in fei_write()  local
264 		attr = fei_attr_lookup(sym + 1);  in fei_write()
265 		if (!attr) {  in fei_write()
269 		fei_attr_remove(attr);  in fei_write()
287 	attr = fei_attr_new(sym, addr);  in fei_write()
288 	if (!attr) {  in fei_write()
293 	ret = register_kprobe(&attr->kp);  in fei_write()
295 		fei_attr_free(attr);  in fei_write()
298 	fei_debugfs_add_attr(attr);  in fei_write()
299 	list_add_tail(&attr->list, &fei_attr_list);  in fei_write()