linux-master/mm/zsmalloc.c

339 static void record_obj(unsigned long handle, unsigned long obj)
341 	*(unsigned long *)handle = obj;
468 static inline void set_freeobj(struct zspage *zspage, unsigned int obj)
470 	zspage->freeobj = obj;
733  * @obj: the encoded object value
737 static void obj_to_location(unsigned long obj, struct page **page,
740 	*page = pfn_to_page(obj >> OBJ_INDEX_BITS);
741 	*obj_idx = (obj & OBJ_INDEX_MASK);
744 static void obj_to_page(unsigned long obj, struct page **page)
746 	*page = pfn_to_page(obj >> OBJ_INDEX_BITS);
750  * location_to_obj - get obj value encoded from (<page>, <obj_idx>)
756 	unsigned long obj;
758 	obj = page_to_pfn(page) << OBJ_INDEX_BITS;
759 	obj |= obj_idx & OBJ_INDEX_MASK;
761 	return obj;
769 static inline bool obj_allocated(struct page *page, void *obj,
779 		handle = *(unsigned long *)obj;
1165 	unsigned long obj, off;
1182 	obj = handle_to_obj(handle);
1183 	obj_to_location(obj, &page, &obj_idx);
1226 	unsigned long obj, off;
1232 	obj = handle_to_obj(handle);
1233 	obj_to_location(obj, &page, &obj_idx);
1279 	unsigned long obj;
1289 	obj = get_freeobj(zspage);
1291 	offset = obj * class->size;
1312 	obj = location_to_obj(m_page, obj);
1314 	return obj;
1330 	unsigned long handle, obj;
1353 		obj = obj_malloc(pool, zspage, handle);
1356 		record_obj(handle, obj);
1371 	obj = obj_malloc(pool, zspage, handle);
1374 	record_obj(handle, obj);
1388 static void obj_free(int class_size, unsigned long obj)
1397 	obj_to_location(obj, &f_page, &f_objidx);
1419 	unsigned long obj;
1431 	obj = handle_to_obj(handle);
1432 	obj_to_page(obj, &f_page);
1437 	obj_free(class->size, obj);