md: split out md_rdev_init
This functionality will be needed separately in a subsequent patch, so
split it into it's own exported function.
Signed-off-by: NeilBrown <neilb@suse.de>
diff --git a/drivers/md/md.h b/drivers/md/md.h
index 1e64059..cc80305 100644
--- a/drivers/md/md.h
+++ b/drivers/md/md.h
@@ -487,4 +487,5 @@
extern int strict_strtoul_scaled(const char *cp, unsigned long *res, int scale);
extern void restore_bitmap_write_access(struct file *file);
+extern void md_rdev_init(mdk_rdev_t *rdev);
#endif /* _MD_MD_H */