mm: compaction: determine if dirty pages can be migrated without blocking within...

[pandora-kernel.git] / include / linux / fs.h

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 43d36b7..2ae90d3 100644 (file)
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -609,9 +609,12 @@ struct address_space_operations {
                        loff_t offset, unsigned long nr_segs);
        int (*get_xip_mem)(struct address_space *, pgoff_t, int,
                                                void **, unsigned long *);
-       /* migrate the contents of a page to the specified target */
+       /*
+        * migrate the contents of a page to the specified target. If sync
+        * is false, it must not block.
+        */
        int (*migratepage) (struct address_space *,
-                       struct page *, struct page *);
+                       struct page *, struct page *, bool);
        int (*launder_page) (struct page *);
        int (*is_partially_uptodate) (struct page *, read_descriptor_t *,
                                        unsigned long);
@@ -2586,7 +2589,7 @@ extern int generic_check_addressable(unsigned, u64);
 
 #ifdef CONFIG_MIGRATION
 extern int buffer_migrate_page(struct address_space *,
-                               struct page *, struct page *);
+                               struct page *, struct page *, bool);
 #else
 #define buffer_migrate_page NULL
 #endif