dm vdo: use a proper Makefile for dm-vdo

Requires moving dm-vdo-target.c into drivers/md/dm-vdo/

This change adds a proper drivers/md/dm-vdo/Makefile and eliminates
the abnormal use of patsubst in drivers/md/Makefile -- which was the
cause of at least one build failure that was reported by the upstream
build bot.

Also, split out VDO's drivers/md/dm-vdo/Kconfig and include it from
drivers/md/Kconfig

Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Signed-off-by: Matthew Sakai <msakai@redhat.com>

MAINTAINERS

@@ -6124,7 +6124,6 @@ M:	dm-devel@lists.linux.dev
 L:	dm-devel@lists.linux.dev
 S:	Maintained
 F:	Documentation/admin-guide/device-mapper/vdo*.rst
-F:	drivers/md/dm-vdo-target.c
 F:	drivers/md/dm-vdo/
 
 DEVLINK

drivers/md/Kconfig

@@ -498,22 +498,6 @@ config DM_FLAKEY
 	help
 	 A target that intermittently fails I/O for debugging purposes.
 
-config DM_VDO
-	tristate "VDO: deduplication and compression target"
-	depends on 64BIT
-	depends on BLK_DEV_DM
-	select DM_BUFIO
-	select LZ4_COMPRESS
-	select LZ4_DECOMPRESS
-	help
-	  This device mapper target presents a block device with
-	  deduplication, compression and thin-provisioning.
-
-	  To compile this code as a module, choose M here: the module will
-	  be called dm-vdo.
-
-	  If unsure, say N.
-
 config DM_VERITY
 	tristate "Verity target support"
 	depends on BLK_DEV_DM
@@ -650,4 +634,6 @@ config DM_AUDIT
 	  Enables audit logging of several security relevant events in the
 	  particular device-mapper targets, especially the integrity target.
 
+source "drivers/md/dm-vdo/Kconfig"
+
 endif # MD

drivers/md/Makefile

@@ -25,7 +25,6 @@ dm-ebs-y	+= dm-ebs-target.o
 dm-era-y	+= dm-era-target.o
 dm-clone-y	+= dm-clone-target.o dm-clone-metadata.o
 dm-verity-y	+= dm-verity-target.o
-dm-vdo-y	+= dm-vdo-target.o $(patsubst drivers/md/dm-vdo/%.c,dm-vdo/%.o,$(wildcard $(src)/dm-vdo/*.c))
 dm-zoned-y	+= dm-zoned-target.o dm-zoned-metadata.o dm-zoned-reclaim.o
 
 md-mod-y	+= md.o md-bitmap.o
@@ -69,7 +68,7 @@ obj-$(CONFIG_DM_ZERO)		+= dm-zero.o
 obj-$(CONFIG_DM_RAID)		+= dm-raid.o
 obj-$(CONFIG_DM_THIN_PROVISIONING) += dm-thin-pool.o
 obj-$(CONFIG_DM_VERITY)		+= dm-verity.o
-obj-$(CONFIG_DM_VDO)            += dm-vdo.o
+obj-$(CONFIG_DM_VDO)            += dm-vdo/
 obj-$(CONFIG_DM_CACHE)		+= dm-cache.o
 obj-$(CONFIG_DM_CACHE_SMQ)	+= dm-cache-smq.o
 obj-$(CONFIG_DM_EBS)		+= dm-ebs.o

drivers/md/dm-vdo/Kconfig

@@ -0,0 +1,17 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+config DM_VDO
+	tristate "VDO: deduplication and compression target"
+	depends on 64BIT
+	depends on BLK_DEV_DM
+	select DM_BUFIO
+	select LZ4_COMPRESS
+	select LZ4_DECOMPRESS
+	help
+	  This device mapper target presents a block device with
+	  deduplication, compression and thin-provisioning.
+
+	  To compile this code as a module, choose M here: the module will
+	  be called dm-vdo.
+
+	  If unsure, say N.

drivers/md/dm-vdo/Makefile

@@ -0,0 +1,61 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+obj-$(CONFIG_DM_VDO) += dm-vdo.o
+
+dm-vdo-objs := \
+	action-manager.o \
+	admin-state.o \
+	block-map.o \
+	chapter-index.o \
+	completion.o \
+	config.o \
+	constants.o \
+	data-vio.o \
+	dedupe.o \
+	delta-index.o \
+	dm-vdo-target.o \
+	dump.o \
+	encodings.o \
+	errors.o \
+	flush.o \
+	funnel-queue.o \
+	funnel-requestqueue.o \
+	funnel-workqueue.o \
+	geometry.o \
+	index-layout.o \
+	index.o \
+	index-page-map.o \
+	index-session.o \
+	int-map.o \
+	io-factory.o \
+	io-submitter.o \
+	logger.o \
+	logical-zone.o \
+	memory-alloc.o \
+	message-stats.o \
+	murmurhash3.o \
+	open-chapter.o \
+	packer.o \
+	permassert.o \
+	physical-zone.o \
+	pool-sysfs.o \
+	pool-sysfs-stats.o \
+	priority-table.o \
+	radix-sort.o \
+	recovery-journal.o \
+	repair.o \
+	slab-depot.o \
+	sparse-cache.o \
+	status-codes.o \
+	string-utils.o \
+	sysfs.o \
+	thread-cond-var.o \
+	thread-device.o \
+	thread-registry.o \
+	uds-sysfs.o \
+	uds-threads.o \
+	vdo.o \
+	vio.o \
+	volume-index.o \
+	volume.o \
+	wait-queue.o

drivers/md/dm-vdo/dm-vdo-target.c

@@ -13,32 +13,32 @@
 #include <linux/mutex.h>
 #include <linux/spinlock.h>
 
-#include "dm-vdo/admin-state.h"
+#include "admin-state.h"
-#include "dm-vdo/block-map.h"
+#include "block-map.h"
-#include "dm-vdo/completion.h"
+#include "completion.h"
-#include "dm-vdo/constants.h"
+#include "constants.h"
-#include "dm-vdo/data-vio.h"
+#include "data-vio.h"
-#include "dm-vdo/dedupe.h"
+#include "dedupe.h"
-#include "dm-vdo/dump.h"
+#include "dump.h"
-#include "dm-vdo/encodings.h"
+#include "encodings.h"
-#include "dm-vdo/errors.h"
+#include "errors.h"
-#include "dm-vdo/flush.h"
+#include "flush.h"
-#include "dm-vdo/io-submitter.h"
+#include "io-submitter.h"
-#include "dm-vdo/logger.h"
+#include "logger.h"
-#include "dm-vdo/memory-alloc.h"
+#include "memory-alloc.h"
-#include "dm-vdo/message-stats.h"
+#include "message-stats.h"
-#include "dm-vdo/pool-sysfs.h"
+#include "pool-sysfs.h"
-#include "dm-vdo/recovery-journal.h"
+#include "recovery-journal.h"
-#include "dm-vdo/repair.h"
+#include "repair.h"
-#include "dm-vdo/slab-depot.h"
+#include "slab-depot.h"
-#include "dm-vdo/status-codes.h"
+#include "status-codes.h"
-#include "dm-vdo/string-utils.h"
+#include "string-utils.h"
-#include "dm-vdo/thread-device.h"
+#include "thread-device.h"
-#include "dm-vdo/thread-registry.h"
+#include "thread-registry.h"
-#include "dm-vdo/types.h"
+#include "types.h"
-#include "dm-vdo/uds-sysfs.h"
+#include "uds-sysfs.h"
-#include "dm-vdo/vdo.h"
+#include "vdo.h"
-#include "dm-vdo/vio.h"
+#include "vio.h"
 
 #define	CURRENT_VERSION "8.3.0.65"