SWP_USED = (1 << 0), /* is slot in swap_info[] used? */
SWP_WRITEOK = (1 << 1), /* ok to write to this swap? */
SWP_ACTIVE = (SWP_USED | SWP_WRITEOK),
+ /* add others here before... */
+ SWP_SCANNING = (1 << 8), /* refcount in scan_swap_map */
};
#define SWAP_CLUSTER_MAX 32
/*
* The in-memory structure used to track swap areas.
- * extent_list.prev points at the lowest-index extent. That list is
- * sorted.
*/
struct swap_info_struct {
unsigned int flags;
- spinlock_t sdev_lock;
+ int prio; /* swap priority */
struct file *swap_file;
struct block_device *bdev;
struct list_head extent_list;
- int nr_extents;
struct swap_extent *curr_swap_extent;
unsigned old_block_size;
unsigned short * swap_map;
unsigned int highest_bit;
unsigned int cluster_next;
unsigned int cluster_nr;
- int prio; /* swap priority */
- int pages;
- unsigned long max;
- unsigned long inuse_pages;
+ unsigned int pages;
+ unsigned int max;
+ unsigned int inuse_pages;
int next; /* next entry on swap list */
};
#define vm_swap_full() (nr_swap_pages*2 < total_swap_pages)
/* linux/mm/oom_kill.c */
-extern void out_of_memory(unsigned int __nocast gfp_mask, int order);
+extern void out_of_memory(gfp_t gfp_mask, int order);
/* linux/mm/memory.c */
extern void swapin_readahead(swp_entry_t, unsigned long, struct vm_area_struct *);
extern void swap_setup(void);
/* linux/mm/vmscan.c */
-extern int try_to_free_pages(struct zone **, unsigned int);
-extern int zone_reclaim(struct zone *, unsigned int, unsigned int);
+extern int try_to_free_pages(struct zone **, gfp_t);
+extern int zone_reclaim(struct zone *, gfp_t, unsigned int);
extern int shrink_all_memory(int);
extern int vm_swappiness;
extern int remove_exclusive_swap_page(struct page *);
struct backing_dev_info;
-extern struct swap_list_t swap_list;
-extern spinlock_t swaplock;
-
-#define swap_list_lock() spin_lock(&swaplock)
-#define swap_list_unlock() spin_unlock(&swaplock)
-#define swap_device_lock(p) spin_lock(&p->sdev_lock)
-#define swap_device_unlock(p) spin_unlock(&p->sdev_lock)
+extern spinlock_t swap_lock;
/* linux/mm/thrash.c */
extern struct mm_struct * swap_token_mm;