Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes...

[safe/jmp/linux-2.6] / include / linux / swap.h

diff --git a/include/linux/swap.h b/include/linux/swap.h
index 0b9210e..62d8143 100644 (file)
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -121,6 +121,8 @@ enum {
        SWP_USED        = (1 << 0),     /* is slot in swap_info[] used? */
        SWP_WRITEOK     = (1 << 1),     /* ok to write to this swap?    */
        SWP_DISCARDABLE = (1 << 2),     /* blkdev supports discard */
+       SWP_DISCARDING  = (1 << 3),     /* now discarding a free cluster */
+       SWP_SOLIDSTATE  = (1 << 4),     /* blkdev seeks are cheap */
                                        /* add others here before... */
        SWP_SCANNING    = (1 << 8),     /* refcount in scan_swap_map */
 };
@@ -144,6 +146,8 @@ struct swap_info_struct {
        unsigned short *swap_map;
        unsigned int lowest_bit;
        unsigned int highest_bit;
+       unsigned int lowest_alloc;      /* while preparing discard cluster */
+       unsigned int highest_alloc;     /* while preparing discard cluster */
        unsigned int cluster_next;
        unsigned int cluster_nr;
        unsigned int pages;
@@ -208,9 +212,10 @@ static inline void lru_cache_add_active_file(struct page *page)
 
 /* linux/mm/vmscan.c */
 extern unsigned long try_to_free_pages(struct zonelist *zonelist, int order,
-                                       gfp_t gfp_mask);
+                                       gfp_t gfp_mask, nodemask_t *mask);
 extern unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *mem,
-                                                       gfp_t gfp_mask);
+                                                 gfp_t gfp_mask, bool noswap,
+                                                 unsigned int swappiness);
 extern int __isolate_lru_page(struct page *page, int mode, int file);
 extern unsigned long shrink_all_memory(unsigned long nr_pages);
 extern int vm_swappiness;
@@ -298,7 +303,7 @@ 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 free_swap_and_cache(swp_entry_t);
 extern int swap_type_of(dev_t, sector_t, struct block_device **);
 extern unsigned int count_swap_pages(int, int);
 extern sector_t map_swap_page(struct swap_info_struct *, pgoff_t);
@@ -329,6 +334,22 @@ static inline void disable_swap_token(void)
        put_swap_token(swap_token_mm);
 }
 
+#ifdef CONFIG_CGROUP_MEM_RES_CTLR
+extern void mem_cgroup_uncharge_swapcache(struct page *page, swp_entry_t ent);
+#else
+static inline void
+mem_cgroup_uncharge_swapcache(struct page *page, swp_entry_t ent)
+{
+}
+#endif
+#ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP
+extern void mem_cgroup_uncharge_swap(swp_entry_t ent);
+#else
+static inline void mem_cgroup_uncharge_swap(swp_entry_t ent)
+{
+}
+#endif
+
 #else /* CONFIG_SWAP */
 
 #define nr_swap_pages                          0L
@@ -348,14 +369,8 @@ 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;
-}
+#define free_swap_and_cache(swp)       is_migration_entry(swp)
+#define swap_duplicate(swp)            is_migration_entry(swp)
 
 static inline void swap_free(swp_entry_t swp)
 {
@@ -367,6 +382,11 @@ static inline struct page *swapin_readahead(swp_entry_t swp, gfp_t gfp_mask,
        return NULL;
 }
 
+static inline int swap_writepage(struct page *p, struct writeback_control *wbc)
+{
+       return 0;
+}
+
 static inline struct page *lookup_swap_cache(swp_entry_t swp)
 {
        return NULL;
@@ -411,6 +431,12 @@ static inline swp_entry_t get_swap_page(void)
 #define has_swap_token(x) 0
 #define disable_swap_token() do { } while(0)
 
+static inline int mem_cgroup_cache_charge_swapin(struct page *page,
+                       struct mm_struct *mm, gfp_t mask, bool locked)
+{
+       return 0;
+}
+
 #endif /* CONFIG_SWAP */
 #endif /* __KERNEL__*/
 #endif /* _LINUX_SWAP_H */