block: Dynamically allocate and refcount backing_dev_info

[mirror_ubuntu-eoan-kernel.git] / include / linux / backing-dev-defs.h

diff --git a/include/linux/backing-dev-defs.h b/include/linux/backing-dev-defs.h
index e850e76acaaf17dea16069faee5d9d12f179ff32..ad955817916d00c35b6b41d204ec61013c88a10f 100644 (file)
--- a/include/linux/backing-dev-defs.h
+++ b/include/linux/backing-dev-defs.h
@@ -10,6 +10,7 @@
 #include <linux/flex_proportions.h>
 #include <linux/timer.h>
 #include <linux/workqueue.h>
+#include <linux/kref.h>
 
 struct page;
 struct device;
@@ -144,6 +145,7 @@ struct backing_dev_info {
 
        char *name;
 
+       struct kref refcnt;     /* Reference counter for the structure */
        unsigned int capabilities; /* Device capabilities */
        unsigned int min_ratio;
        unsigned int max_ratio, max_prop_frac;