24 static void *cache_first_page(struct squashfs_page_actor *actor)  in cache_first_page()  argument
26 	actor->next_page = 1;  in cache_first_page()
27 	return actor->buffer[0];  in cache_first_page()
30 static void *cache_next_page(struct squashfs_page_actor *actor)  in cache_next_page()  argument
32 	if (actor->next_page == actor->pages)  in cache_next_page()
35 	return actor->buffer[actor->next_page++];  in cache_next_page()
38 static void cache_finish_page(struct squashfs_page_actor *actor)  in cache_finish_page()  argument
46 	struct squashfs_page_actor *actor = kmalloc(sizeof(*actor), GFP_KERNEL);  in squashfs_page_actor_init()  local
48 	if (actor == NULL)  in squashfs_page_actor_init()
51 	actor->length = length ? : pages * PAGE_CACHE_SIZE;  in squashfs_page_actor_init()
52 	actor->buffer = buffer;  in squashfs_page_actor_init()
53 	actor->pages = pages;  in squashfs_page_actor_init()
54 	actor->next_page = 0;  in squashfs_page_actor_init()
55 	actor->squashfs_first_page = cache_first_page;  in squashfs_page_actor_init()
56 	actor->squashfs_next_page = cache_next_page;  in squashfs_page_actor_init()
57 	actor->squashfs_finish_page = cache_finish_page;  in squashfs_page_actor_init()
58 	return actor;  in squashfs_page_actor_init()
62 static void *direct_first_page(struct squashfs_page_actor *actor)  in direct_first_page()  argument
64 	actor->next_page = 1;  in direct_first_page()
65 	return actor->pageaddr = kmap_atomic(actor->page[0]);  in direct_first_page()
68 static void *direct_next_page(struct squashfs_page_actor *actor)  in direct_next_page()  argument
70 	if (actor->pageaddr)  in direct_next_page()
71 		kunmap_atomic(actor->pageaddr);  in direct_next_page()
73 	return actor->pageaddr = actor->next_page == actor->pages ? NULL :  in direct_next_page()
74 		kmap_atomic(actor->page[actor->next_page++]);  in direct_next_page()
77 static void direct_finish_page(struct squashfs_page_actor *actor)  in direct_finish_page()  argument
79 	if (actor->pageaddr)  in direct_finish_page()
80 		kunmap_atomic(actor->pageaddr);  in direct_finish_page()
86 	struct squashfs_page_actor *actor = kmalloc(sizeof(*actor), GFP_KERNEL);  in squashfs_page_actor_init_special()  local
88 	if (actor == NULL)  in squashfs_page_actor_init_special()
91 	actor->length = length ? : pages * PAGE_CACHE_SIZE;  in squashfs_page_actor_init_special()
92 	actor->page = page;  in squashfs_page_actor_init_special()
93 	actor->pages = pages;  in squashfs_page_actor_init_special()
94 	actor->next_page = 0;  in squashfs_page_actor_init_special()
95 	actor->pageaddr = NULL;  in squashfs_page_actor_init_special()
96 	actor->squashfs_first_page = direct_first_page;  in squashfs_page_actor_init_special()
97 	actor->squashfs_next_page = direct_next_page;  in squashfs_page_actor_init_special()
98 	actor->squashfs_finish_page = direct_finish_page;  in squashfs_page_actor_init_special()
99 	return actor;  in squashfs_page_actor_init_special()