Raise fops as the main structure in linux.

diff --git a/plano b/plano
index 140c9f2..3348a13 100644 (file)
--- a/plano
+++ b/plano
@@ -42,6 +42,7 @@ basics
 VFS
        center/hub/interface
        char/block/procfs/sysfs: all go through VFS to device
+       fops is the main structure in linux
        FS on top of block devices
                block layer
                exception: some on top of MTD devices