-/* page backup entry */
-typedef struct pbe {
- unsigned long address; /* address of the copy */
- unsigned long orig_address; /* original address of page */
- swp_entry_t swap_address;
-
- struct pbe *next; /* also used as scratch space at
- * end of page (see link, diskpage)
- */
-} suspend_pagedir_t;
-
-#define for_each_pbe(pbe, pblist) \
- for (pbe = pblist ; pbe ; pbe = pbe->next)
-
-#define PBES_PER_PAGE (PAGE_SIZE/sizeof(struct pbe))
-#define PB_PAGE_SKIP (PBES_PER_PAGE-1)
-
-#define for_each_pb_page(pbe, pblist) \
- for (pbe = pblist ; pbe ; pbe = (pbe+PB_PAGE_SKIP)->next)
-
-
-#define SWAP_FILENAME_MAXLENGTH 32
-
-
-extern dev_t swsusp_resume_device;
-
-/* mm/vmscan.c */
-extern int shrink_mem(void);
+/* struct pbe is used for creating lists of pages that should be restored
+ * atomically during the resume from disk, because the page frames they have
+ * occupied before the suspend are in use.
+ */
+struct pbe {
+ void *address; /* address of the copy */
+ void *orig_address; /* original address of a page */
+ struct pbe *next;
+};