btrfs: allow extent buffer helpers to skip cross-page handling

[linux-2.6-microblaze.git] / fs / btrfs / extent_io.h

diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index 021040b..c2c6bfb 100644 (file)
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -78,6 +78,13 @@ struct extent_buffer {
        unsigned long len;
        unsigned long bflags;
        struct btrfs_fs_info *fs_info;
+
+       /*
+        * The address where the eb can be accessed without any cross-page handling.
+        * This can be NULL if not possible.
+        */
+       void *addr;
+
        spinlock_t refs_lock;
        atomic_t refs;
        int read_mirror;