xfs: fix type usage
[linux/fpc-iii.git] / fs / squashfs / page_actor.h
blob98537eab27e270d8b04f04b7d0db2ee519e21d46
1 #ifndef PAGE_ACTOR_H
2 #define PAGE_ACTOR_H
3 /*
4 * Copyright (c) 2013
5 * Phillip Lougher <phillip@squashfs.org.uk>
7 * This work is licensed under the terms of the GNU GPL, version 2. See
8 * the COPYING file in the top-level directory.
9 */
11 #ifndef CONFIG_SQUASHFS_FILE_DIRECT
12 struct squashfs_page_actor {
13 void **page;
14 int pages;
15 int length;
16 int next_page;
19 static inline struct squashfs_page_actor *squashfs_page_actor_init(void **page,
20 int pages, int length)
22 struct squashfs_page_actor *actor = kmalloc(sizeof(*actor), GFP_KERNEL);
24 if (actor == NULL)
25 return NULL;
27 actor->length = length ? : pages * PAGE_SIZE;
28 actor->page = page;
29 actor->pages = pages;
30 actor->next_page = 0;
31 return actor;
34 static inline void *squashfs_first_page(struct squashfs_page_actor *actor)
36 actor->next_page = 1;
37 return actor->page[0];
40 static inline void *squashfs_next_page(struct squashfs_page_actor *actor)
42 return actor->next_page == actor->pages ? NULL :
43 actor->page[actor->next_page++];
46 static inline void squashfs_finish_page(struct squashfs_page_actor *actor)
48 /* empty */
50 #else
51 struct squashfs_page_actor {
52 union {
53 void **buffer;
54 struct page **page;
56 void *pageaddr;
57 void *(*squashfs_first_page)(struct squashfs_page_actor *);
58 void *(*squashfs_next_page)(struct squashfs_page_actor *);
59 void (*squashfs_finish_page)(struct squashfs_page_actor *);
60 int pages;
61 int length;
62 int next_page;
65 extern struct squashfs_page_actor *squashfs_page_actor_init(void **, int, int);
66 extern struct squashfs_page_actor *squashfs_page_actor_init_special(struct page
67 **, int, int);
68 static inline void *squashfs_first_page(struct squashfs_page_actor *actor)
70 return actor->squashfs_first_page(actor);
72 static inline void *squashfs_next_page(struct squashfs_page_actor *actor)
74 return actor->squashfs_next_page(actor);
76 static inline void squashfs_finish_page(struct squashfs_page_actor *actor)
78 actor->squashfs_finish_page(actor);
80 #endif
81 #endif