diff --git a/kmod/src/Makefile.kernelcompat b/kmod/src/Makefile.kernelcompat
index 409bdc27..b781eea4 100644
--- a/kmod/src/Makefile.kernelcompat
+++ b/kmod/src/Makefile.kernelcompat
@@ -139,3 +139,13 @@ endif
 ifneq (,$(shell grep '(*shrink)' include/linux/shrinker.h))
 ccflags-y += -DKC_SHRINKER_SHRINK
 endif
+
+#
+# v3.19-4777-g6bec00352861
+#
+# backing_dev_info is removed from address_space. Instead we need to use
+# inode_to_bdi() inline from <backing-dev.h>.
+#
+ifneq (,$(shell grep 'struct backing_dev_info.*backing_dev_info' include/linux/fs.h))
+ccflags-y += -DKC_LINUX_BACKING_DEV_INFO=1
+endif
diff --git a/kmod/src/ioctl.c b/kmod/src/ioctl.c
index 964db6f4..fb8c8c46 100644
--- a/kmod/src/ioctl.c
+++ b/kmod/src/ioctl.c
@@ -22,6 +22,7 @@
 #include <linux/sched.h>
 #include <linux/aio.h>
 #include <linux/list_sort.h>
+#include <linux/backing-dev.h>
 
 #include "format.h"
 #include "key.h"
@@ -448,7 +449,6 @@ static long scoutfs_ioc_stage(struct file *file, unsigned long arg)
 {
 	struct inode *inode = file_inode(file);
 	struct super_block *sb = inode->i_sb;
-	struct address_space *mapping = inode->i_mapping;
 	struct scoutfs_inode_info *si = SCOUTFS_I(inode);
 	SCOUTFS_DECLARE_PER_TASK_ENTRY(pt_ent);
 	struct scoutfs_ioctl_stage args;
@@ -516,7 +516,7 @@ static long scoutfs_ioc_stage(struct file *file, unsigned long arg)
 	}
 
 	si->staging = true;
-	current->backing_dev_info = mapping->backing_dev_info;
+	current->backing_dev_info = inode_to_bdi(inode);
 
 	pos = args.offset;
 	written = 0;