149 	struct kprobe_insn_page *kip;  in __get_insn_slot()  local
154 	list_for_each_entry(kip, &c->pages, list) {  in __get_insn_slot()
155 		if (kip->nused < slots_per_page(c)) {  in __get_insn_slot()
158 				if (kip->slot_used[i] == SLOT_CLEAN) {  in __get_insn_slot()
159 					kip->slot_used[i] = SLOT_USED;  in __get_insn_slot()
160 					kip->nused++;  in __get_insn_slot()
161 					slot = kip->insns + (i * c->insn_size);  in __get_insn_slot()
166 			kip->nused = slots_per_page(c);  in __get_insn_slot()
176 	kip = kmalloc(KPROBE_INSN_PAGE_SIZE(slots_per_page(c)), GFP_KERNEL);  in __get_insn_slot()
177 	if (!kip)  in __get_insn_slot()
185 	kip->insns = c->alloc();  in __get_insn_slot()
186 	if (!kip->insns) {  in __get_insn_slot()
187 		kfree(kip);  in __get_insn_slot()
190 	INIT_LIST_HEAD(&kip->list);  in __get_insn_slot()
191 	memset(kip->slot_used, SLOT_CLEAN, slots_per_page(c));  in __get_insn_slot()
192 	kip->slot_used[0] = SLOT_USED;  in __get_insn_slot()
193 	kip->nused = 1;  in __get_insn_slot()
194 	kip->ngarbage = 0;  in __get_insn_slot()
195 	kip->cache = c;  in __get_insn_slot()
196 	list_add(&kip->list, &c->pages);  in __get_insn_slot()
197 	slot = kip->insns;  in __get_insn_slot()
204 static int collect_one_slot(struct kprobe_insn_page *kip, int idx)  in collect_one_slot()  argument
206 	kip->slot_used[idx] = SLOT_CLEAN;  in collect_one_slot()
207 	kip->nused--;  in collect_one_slot()
208 	if (kip->nused == 0) {  in collect_one_slot()
215 		if (!list_is_singular(&kip->list)) {  in collect_one_slot()
216 			list_del(&kip->list);  in collect_one_slot()
217 			kip->cache->free(kip->insns);  in collect_one_slot()
218 			kfree(kip);  in collect_one_slot()
227 	struct kprobe_insn_page *kip, *next;  in collect_garbage_slots()  local
232 	list_for_each_entry_safe(kip, next, &c->pages, list) {  in collect_garbage_slots()
234 		if (kip->ngarbage == 0)  in collect_garbage_slots()
236 		kip->ngarbage = 0;	/* we will collect all garbages */  in collect_garbage_slots()
238 			if (kip->slot_used[i] == SLOT_DIRTY &&  in collect_garbage_slots()
239 			    collect_one_slot(kip, i))  in collect_garbage_slots()
250 	struct kprobe_insn_page *kip;  in __free_insn_slot()  local
253 	list_for_each_entry(kip, &c->pages, list) {  in __free_insn_slot()
254 		long idx = ((long)slot - (long)kip->insns) /  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()