133 	struct kprobe_insn_page *kip;  in __get_insn_slot()  local
140 	list_for_each_entry_rcu(kip, &c->pages, list) {  in __get_insn_slot()
141 		if (kip->nused < slots_per_page(c)) {  in __get_insn_slot()
144 				if (kip->slot_used[i] == SLOT_CLEAN) {  in __get_insn_slot()
145 					kip->slot_used[i] = SLOT_USED;  in __get_insn_slot()
146 					kip->nused++;  in __get_insn_slot()
147 					slot = kip->insns + (i * c->insn_size);  in __get_insn_slot()
153 			kip->nused = slots_per_page(c);  in __get_insn_slot()
164 	kip = kmalloc(KPROBE_INSN_PAGE_SIZE(slots_per_page(c)), GFP_KERNEL);  in __get_insn_slot()
165 	if (!kip)  in __get_insn_slot()
173 	kip->insns = c->alloc();  in __get_insn_slot()
174 	if (!kip->insns) {  in __get_insn_slot()
175 		kfree(kip);  in __get_insn_slot()
178 	INIT_LIST_HEAD(&kip->list);  in __get_insn_slot()
179 	memset(kip->slot_used, SLOT_CLEAN, slots_per_page(c));  in __get_insn_slot()
180 	kip->slot_used[0] = SLOT_USED;  in __get_insn_slot()
181 	kip->nused = 1;  in __get_insn_slot()
182 	kip->ngarbage = 0;  in __get_insn_slot()
183 	kip->cache = c;  in __get_insn_slot()
184 	list_add_rcu(&kip->list, &c->pages);  in __get_insn_slot()
185 	slot = kip->insns;  in __get_insn_slot()
192 static int collect_one_slot(struct kprobe_insn_page *kip, int idx)  in collect_one_slot()  argument
194 	kip->slot_used[idx] = SLOT_CLEAN;  in collect_one_slot()
195 	kip->nused--;  in collect_one_slot()
196 	if (kip->nused == 0) {  in collect_one_slot()
203 		if (!list_is_singular(&kip->list)) {  in collect_one_slot()
204 			list_del_rcu(&kip->list);  in collect_one_slot()
206 			kip->cache->free(kip->insns);  in collect_one_slot()
207 			kfree(kip);  in collect_one_slot()
216 	struct kprobe_insn_page *kip, *next;  in collect_garbage_slots()  local
221 	list_for_each_entry_safe(kip, next, &c->pages, list) {  in collect_garbage_slots()
223 		if (kip->ngarbage == 0)  in collect_garbage_slots()
225 		kip->ngarbage = 0;	/* we will collect all garbages */  in collect_garbage_slots()
227 			if (kip->slot_used[i] == SLOT_DIRTY && collect_one_slot(kip, i))  in collect_garbage_slots()
238 	struct kprobe_insn_page *kip;  in __free_insn_slot()  local
243 	list_for_each_entry_rcu(kip, &c->pages, list) {  in __free_insn_slot()
244 		idx = ((long)slot - (long)kip->insns) /  in __free_insn_slot()
251 	kip = NULL;  in __free_insn_slot()
255 	if (kip) {  in __free_insn_slot()
257 		WARN_ON(kip->slot_used[idx] != SLOT_USED);  in __free_insn_slot()
259 			kip->slot_used[idx] = SLOT_DIRTY;  in __free_insn_slot()
260 			kip->ngarbage++;  in __free_insn_slot()
264 			collect_one_slot(kip, idx);  in __free_insn_slot()
277 	struct kprobe_insn_page *kip;  in __is_insn_slot_addr()  local
281 	list_for_each_entry_rcu(kip, &c->pages, list) {  in __is_insn_slot_addr()
282 		if (addr >= (unsigned long)kip->insns &&  in __is_insn_slot_addr()
283 		    addr < (unsigned long)kip->insns + PAGE_SIZE) {  in __is_insn_slot_addr()