md: remove some dead fields from mddev_s

These fields have never been used.
commit 4b6d287f627b5fb6a49f78f9e81649ff98c62bb7
added them, but also added identical files to bitmap_super_s,
and only used the latter.

So remove these unused fields.

Signed-off-by: NeilBrown <neilb@suse.de>

diff --git a/drivers/md/md.h b/drivers/md/md.h
index 722f5dfe1953ec5a22f1b705bd06d2d24629bf43..05145786b50fb9920f94a404a2419a068b4f443b 100644 (file)
--- a/drivers/md/md.h
+++ b/drivers/md/md.h
@@ -279,9 +279,6 @@ struct mddev_s
        atomic_t                        writes_pending; 
        struct request_queue            *queue; /* for plugging ... */
 
-       atomic_t                        write_behind; /* outstanding async IO */
-       unsigned int                    max_write_behind; /* 0 = sync */
-
        struct bitmap                   *bitmap; /* the bitmap for the device */
        struct {
                struct file             *file; /* the bitmap file */