22 static void *cache_first_page(struct squashfs_page_actor *actor)  in cache_first_page()  argument
24 	actor->next_page = 1;  in cache_first_page()
25 	return actor->buffer[0];  in cache_first_page()
28 static void *cache_next_page(struct squashfs_page_actor *actor)  in cache_next_page()  argument
30 	if (actor->next_page == actor->pages)  in cache_next_page()
33 	return actor->buffer[actor->next_page++];  in cache_next_page()
36 static void cache_finish_page(struct squashfs_page_actor *actor)  in cache_finish_page()  argument
44 	struct squashfs_page_actor *actor = kmalloc(sizeof(*actor), GFP_KERNEL);  in squashfs_page_actor_init()  local
46 	if (actor == NULL)  in squashfs_page_actor_init()
49 	actor->length = length ? : pages * PAGE_SIZE;  in squashfs_page_actor_init()
50 	actor->buffer = buffer;  in squashfs_page_actor_init()
51 	actor->pages = pages;  in squashfs_page_actor_init()
52 	actor->next_page = 0;  in squashfs_page_actor_init()
53 	actor->squashfs_first_page = cache_first_page;  in squashfs_page_actor_init()
54 	actor->squashfs_next_page = cache_next_page;  in squashfs_page_actor_init()
55 	actor->squashfs_finish_page = cache_finish_page;  in squashfs_page_actor_init()
56 	return actor;  in squashfs_page_actor_init()
60 static void *direct_first_page(struct squashfs_page_actor *actor)  in direct_first_page()  argument
62 	actor->next_page = 1;  in direct_first_page()
63 	return actor->pageaddr = kmap_atomic(actor->page[0]);  in direct_first_page()
66 static void *direct_next_page(struct squashfs_page_actor *actor)  in direct_next_page()  argument
68 	if (actor->pageaddr)  in direct_next_page()
69 		kunmap_atomic(actor->pageaddr);  in direct_next_page()
71 	return actor->pageaddr = actor->next_page == actor->pages ? NULL :  in direct_next_page()
72 		kmap_atomic(actor->page[actor->next_page++]);  in direct_next_page()
75 static void direct_finish_page(struct squashfs_page_actor *actor)  in direct_finish_page()  argument
77 	if (actor->pageaddr)  in direct_finish_page()
78 		kunmap_atomic(actor->pageaddr);  in direct_finish_page()
84 	struct squashfs_page_actor *actor = kmalloc(sizeof(*actor), GFP_KERNEL);  in squashfs_page_actor_init_special()  local
86 	if (actor == NULL)  in squashfs_page_actor_init_special()
89 	actor->length = length ? : pages * PAGE_SIZE;  in squashfs_page_actor_init_special()
90 	actor->page = page;  in squashfs_page_actor_init_special()
91 	actor->pages = pages;  in squashfs_page_actor_init_special()
92 	actor->next_page = 0;  in squashfs_page_actor_init_special()
93 	actor->pageaddr = NULL;  in squashfs_page_actor_init_special()
94 	actor->squashfs_first_page = direct_first_page;  in squashfs_page_actor_init_special()
95 	actor->squashfs_next_page = direct_next_page;  in squashfs_page_actor_init_special()
96 	actor->squashfs_finish_page = direct_finish_page;  in squashfs_page_actor_init_special()
97 	return actor;  in squashfs_page_actor_init_special()