pagecache descriptor structure

1 files changed, 7 insertions, 0 deletions

diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 8d37e26a1007..e8011e019864 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -12,6 +12,7 @@
 #include <linux/cpumask.h>
 #include <linux/uprobes.h>
 #include <linux/page-flags-layout.h>
+#include <linux/radix-tree.h>
 #include <asm/page.h>
 #include <asm/mmu.h>
 
@@ -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 */