#ifndef _LINUX_SWAP_H
#define _LINUX_SWAP_H
-#include <linux/config.h>
#include <linux/spinlock.h>
#include <linux/linkage.h>
#include <linux/mmzone.h>
* the type/offset into the pte as 5/27 as well.
*/
#define MAX_SWAPFILES_SHIFT 5
+#ifndef CONFIG_MIGRATION
#define MAX_SWAPFILES (1 << MAX_SWAPFILES_SHIFT)
+#else
+/* Use last two entries for page migration swap entries */
+#define MAX_SWAPFILES ((1 << MAX_SWAPFILES_SHIFT)-2)
+#define SWP_MIGRATION_READ MAX_SWAPFILES
+#define SWP_MIGRATION_WRITE (MAX_SWAPFILES + 1)
+#endif
/*
* Magic header for a swap area. The first part of the union is
char magic[10]; /* SWAP-SPACE or SWAPSPACE2 */
} magic;
struct {
- char bootbits[1024]; /* Space for disklabel etc. */
- unsigned int version;
- unsigned int last_page;
- unsigned int nr_badpages;
- unsigned int padding[125];
- unsigned int badpages[1];
+ char bootbits[1024]; /* Space for disklabel etc. */
+ __u32 version;
+ __u32 last_page;
+ __u32 nr_badpages;
+ unsigned char sws_uuid[16];
+ unsigned char sws_volume[16];
+ __u32 padding[117];
+ __u32 badpages[1];
} info;
};
/* linux/mm/page_alloc.c */
extern unsigned long totalram_pages;
extern unsigned long totalhigh_pages;
+extern unsigned long totalreserve_pages;
extern long nr_swap_pages;
extern unsigned int nr_free_pages(void);
extern unsigned int nr_free_pages_pgdat(pg_data_t *pgdat);
extern void swap_setup(void);
/* linux/mm/vmscan.c */
-extern int try_to_free_pages(struct zone **, gfp_t);
-extern int shrink_all_memory(int);
+extern unsigned long try_to_free_pages(struct zone **, gfp_t);
+extern unsigned long shrink_all_memory(unsigned long nr_pages);
extern int vm_swappiness;
+extern int remove_mapping(struct address_space *mapping, struct page *page);
#ifdef CONFIG_NUMA
extern int zone_reclaim_mode;
}
#endif
-#ifdef CONFIG_MIGRATION
-extern int isolate_lru_page(struct page *p);
-extern int putback_lru_pages(struct list_head *l);
-extern int migrate_page(struct page *, struct page *);
-extern void migrate_page_copy(struct page *, struct page *);
-extern int migrate_page_remove_references(struct page *, struct page *, int);
-extern int migrate_pages(struct list_head *l, struct list_head *t,
- struct list_head *moved, struct list_head *failed);
-extern int fail_migrate_page(struct page *, struct page *);
-#else
-static inline int isolate_lru_page(struct page *p) { return -ENOSYS; }
-static inline int putback_lru_pages(struct list_head *l) { return 0; }
-static inline int migrate_pages(struct list_head *l, struct list_head *t,
- struct list_head *moved, struct list_head *failed) { return -ENOSYS; }
-/* Possible settings for the migrate_page() method in address_operations */
-#define migrate_page NULL
-#define fail_migrate_page NULL
-#endif
-
#ifdef CONFIG_MMU
/* linux/mm/shmem.c */
extern int shmem_unuse(swp_entry_t entry, struct page *page);
/* linux/mm/swapfile.c */
extern long total_swap_pages;
extern unsigned int nr_swapfiles;
-extern struct swap_info_struct swap_info[];
extern void si_swapinfo(struct sysinfo *);
extern swp_entry_t get_swap_page(void);
-extern swp_entry_t get_swap_page_of_type(int type);
+extern swp_entry_t get_swap_page_of_type(int);
extern int swap_duplicate(swp_entry_t);
extern int valid_swaphandles(swp_entry_t, unsigned long *);
extern void swap_free(swp_entry_t);
extern void free_swap_and_cache(swp_entry_t);
+extern int swap_type_of(dev_t);
+extern unsigned int count_swap_pages(int, int);
extern sector_t map_swap_page(struct swap_info_struct *, pgoff_t);
extern struct swap_info_struct *get_swap_info_struct(unsigned);
extern int can_share_swap_page(struct page *);
struct backing_dev_info;
extern spinlock_t swap_lock;
-extern int remove_vma_swap(struct vm_area_struct *vma, struct page *page);
/* linux/mm/thrash.c */
extern struct mm_struct * swap_token_mm;
#define free_pages_and_swap_cache(pages, nr) \
release_pages((pages), (nr), 0);
-#define show_swap_cache_info() /*NOTHING*/
-#define free_swap_and_cache(swp) /*NOTHING*/
-#define swap_duplicate(swp) /*NOTHING*/
-#define swap_free(swp) /*NOTHING*/
-#define read_swap_cache_async(swp,vma,addr) NULL
-#define lookup_swap_cache(swp) NULL
-#define valid_swaphandles(swp, off) 0
-#define can_share_swap_page(p) 0
-#define move_to_swap_cache(p, swp) 1
-#define move_from_swap_cache(p, i, m) 1
-#define __delete_from_swap_cache(p) /*NOTHING*/
-#define delete_from_swap_cache(p) /*NOTHING*/
+static inline void show_swap_cache_info(void)
+{
+}
+
+static inline void free_swap_and_cache(swp_entry_t swp)
+{
+}
+
+static inline int swap_duplicate(swp_entry_t swp)
+{
+ return 0;
+}
+
+static inline void swap_free(swp_entry_t swp)
+{
+}
+
+static inline struct page *read_swap_cache_async(swp_entry_t swp,
+ struct vm_area_struct *vma, unsigned long addr)
+{
+ return NULL;
+}
+
+static inline struct page *lookup_swap_cache(swp_entry_t swp)
+{
+ return NULL;
+}
+
+static inline int valid_swaphandles(swp_entry_t entry, unsigned long *offset)
+{
+ return 0;
+}
+
+#define can_share_swap_page(p) (page_mapcount(p) == 1)
+
+static inline int move_to_swap_cache(struct page *page, swp_entry_t entry)
+{
+ return 1;
+}
+
+static inline int move_from_swap_cache(struct page *page, unsigned long index,
+ struct address_space *mapping)
+{
+ return 1;
+}
+
+static inline void __delete_from_swap_cache(struct page *page)
+{
+}
+
+static inline void delete_from_swap_cache(struct page *page)
+{
+}
+
#define swap_token_default_timeout 0
static inline int remove_exclusive_swap_page(struct page *p)
git.openpandora.org / pandora-kernel.git / blobdiff