4 files changed, 11 insertions, 0 deletions

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 1ea979d984c2..9bddbf91dcbf 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -489,6 +489,7 @@ struct block_device {
 #define PAGECACHE_TAG_DIRTY     0
 #define PAGECACHE_TAG_WRITEBACK 1
 #define PAGECACHE_TAG_TOWRITE   2
+#define PAGECACHE_TAG_REPLICATED 3
 
 int mapping_tagged(struct address_space *mapping, int tag);
 
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 0755b9fd03a7..55df1f8bf4cb 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2200,5 +2200,7 @@ void __init setup_nr_node_ids(void);
 static inline void setup_nr_node_ids(void) {}
 #endif
 
+extern void replication_init(void);
+
 #endif /* __KERNEL__ */
 #endif /* _LINUX_MM_H */
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 8d37e26a1007..76603d077455 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -14,6 +14,7 @@
 #include <linux/page-flags-layout.h>
 #include <asm/page.h>
 #include <asm/mmu.h>
+#include <linux/radix-tree.h>
 
 #ifndef AT_VECTOR_SIZE_ARCH
 #define AT_VECTOR_SIZE_ARCH 0
@@ -545,4 +546,10 @@ typedef struct {
         unsigned long val;
 } swp_entry_t;
 
+struct pcache_desc {
+        struct page *master;
+        cpumask_t cpus_present;
+        struct radix_tree_root page_tree;
+};
+
 #endif /* _LINUX_MM_TYPES_H */
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 54d74f6eb233..d3762dec9dea 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -128,6 +128,7 @@ enum zone_stat_item {
         NR_FILE_PAGES,
         NR_FILE_DIRTY,
         NR_WRITEBACK,
+        NR_REPL_PAGES,
         NR_SLAB_RECLAIMABLE,
         NR_SLAB_UNRECLAIMABLE,
         NR_PAGETABLE,           /* used for pagetables */