diff options
Diffstat (limited to 'include/linux/swap.h')
| -rw-r--r-- | include/linux/swap.h | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/include/linux/swap.h b/include/linux/swap.h index f733deb10748..389e7bd92cca 100644 --- a/include/linux/swap.h +++ b/include/linux/swap.h @@ -145,15 +145,18 @@ enum { SWP_DISCARDABLE = (1 << 2), /* blkdev supports discard */ SWP_DISCARDING = (1 << 3), /* now discarding a free cluster */ SWP_SOLIDSTATE = (1 << 4), /* blkdev seeks are cheap */ + SWP_CONTINUED = (1 << 5), /* swap_map has count continuation */ /* add others here before... */ SWP_SCANNING = (1 << 8), /* refcount in scan_swap_map */ }; #define SWAP_CLUSTER_MAX 32 -#define SWAP_MAP_MAX 0x7e -#define SWAP_MAP_BAD 0x7f -#define SWAP_HAS_CACHE 0x80 /* There is a swap cache of entry. */ +#define SWAP_MAP_MAX 0x3e /* Max duplication count, in first swap_map */ +#define SWAP_MAP_BAD 0x3f /* Note pageblock is bad, in first swap_map */ +#define SWAP_HAS_CACHE 0x40 /* Flag page is cached, in first swap_map */ +#define SWAP_CONT_MAX 0x7f /* Max count, in each swap_map continuation */ +#define COUNT_CONTINUED 0x80 /* See swap_map continuation for full count */ /* * The in-memory structure used to track swap areas. @@ -311,9 +314,10 @@ extern long total_swap_pages; extern void si_swapinfo(struct sysinfo *); extern swp_entry_t get_swap_page(void); extern swp_entry_t get_swap_page_of_type(int); -extern void swap_duplicate(swp_entry_t); -extern int swapcache_prepare(swp_entry_t); extern int valid_swaphandles(swp_entry_t, unsigned long *); +extern int add_swap_count_continuation(swp_entry_t, gfp_t); +extern int swap_duplicate(swp_entry_t); +extern int swapcache_prepare(swp_entry_t); extern void swap_free(swp_entry_t); extern void swapcache_free(swp_entry_t, struct page *page); extern int free_swap_and_cache(swp_entry_t); @@ -385,8 +389,14 @@ static inline void show_swap_cache_info(void) #define free_swap_and_cache(swp) is_migration_entry(swp) #define swapcache_prepare(swp) is_migration_entry(swp) -static inline void swap_duplicate(swp_entry_t swp) +static inline int add_swap_count_continuation(swp_entry_t swp, gfp_t gfp_mask) { + return 0; +} + +static inline int swap_duplicate(swp_entry_t swp) +{ + return 0; } static inline void swap_free(swp_entry_t swp) |