Allows to build a module.

Signed-off-by: Sergei Shtepa <sergei.shtepa@veeam.com>
---
 drivers/block/blksnap/Makefile | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 drivers/block/blksnap/Makefile

diff --git a/drivers/block/blksnap/Makefile b/drivers/block/blksnap/Makefile
new file mode 100644
index 000000000000..18b6b9e8f944
--- /dev/null
+++ b/drivers/block/blksnap/Makefile
@@ -0,0 +1,20 @@
+# SPDX-License-Identifier: GPL-2.0
+KERNEL_MODULE_NAME := blksnap
+
+$(KERNEL_MODULE_NAME)-y += big_buffer.o
+$(KERNEL_MODULE_NAME)-y += cbt_map.o
+$(KERNEL_MODULE_NAME)-y += chunk.o
+$(KERNEL_MODULE_NAME)-y += ctrl.o
+$(KERNEL_MODULE_NAME)-y += diff_io.o
+$(KERNEL_MODULE_NAME)-y += diff_area.o
+$(KERNEL_MODULE_NAME)-y += diff_buffer.o
+$(KERNEL_MODULE_NAME)-y += diff_storage.o
+$(KERNEL_MODULE_NAME)-y += event_queue.o
+$(KERNEL_MODULE_NAME)-y += main.o
+$(KERNEL_MODULE_NAME)-y += snapimage.o
+$(KERNEL_MODULE_NAME)-y += snapshot.o
+$(KERNEL_MODULE_NAME)-y += sysfs.o
+$(KERNEL_MODULE_NAME)-y += tracker.o
+$(KERNEL_MODULE_NAME)-y += memory_checker.o
+
+obj-m	 += $(KERNEL_MODULE_NAME).o
-- 
2.20.1

On Mon, Jun 13, 2022 at 06:53:12PM +0300, Sergei Shtepa wrote:
> +# SPDX-License-Identifier: GPL-2.0
> +KERNEL_MODULE_NAME := blksnap

Just drop this define.

> +obj-m	 += $(KERNEL_MODULE_NAME).o

and this should be

obj-$(CONFIG_BLK_SNAP) += ..