Documentation: use subdir-y to avoid unnecessary built-in.o files

Change the Documentation makefiles from obj-m to subdir-y
to avoid generating unnecessary built-in.o files since nothing
in Documentation/ is ever linked in to vmlinux.

Signed-off-by: Peter Foley <pefoley2@pefoley.com>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

15 files changed, 6 insertions, 43 deletions

diff --git a/Documentation/Makefile b/Documentation/Makefile
index 31d302bc5863..605f84f29bae 100644
--- a/Documentation/Makefile
+++ b/Documentation/Makefile
@@ -1,3 +1,3 @@
-obj-m := DocBook/ accounting/ auxdisplay/ connector/ \
-        filesystems/ filesystems/configfs/ ia64/ laptops/ networking/ \
-        pcmcia/ spi/ timers/ watchdog/src/ misc-devices/mei/
+subdir-y := DocBook accounting auxdisplay connector \
+        filesystems filesystems ia64 laptops networking \
+        pcmcia spi timers watchdog misc-devices
diff --git a/Documentation/accounting/Makefile b/Documentation/accounting/Makefile
index 31929eb875b1..7e232cb6fd7d 100644
--- a/Documentation/accounting/Makefile
+++ b/Documentation/accounting/Makefile
@@ -1,6 +1,3 @@
-# kbuild trick to avoid linker error. Can be omitted if a module is built.
-obj- := dummy.o
-
 # List of programs to build
 hostprogs-y := getdelays
 
diff --git a/Documentation/auxdisplay/Makefile b/Documentation/auxdisplay/Makefile
index 51fe23332c81..ada4dac99ef4 100644
--- a/Documentation/auxdisplay/Makefile
+++ b/Documentation/auxdisplay/Makefile
@@ -1,6 +1,3 @@
-# kbuild trick to avoid linker error. Can be omitted if a module is built.
-obj- := dummy.o
-
 # List of programs to build
 hostprogs-y := cfag12864b-example
 
diff --git a/Documentation/filesystems/Makefile b/Documentation/filesystems/Makefile
index a5dd114da14f..883010ce5e35 100644
--- a/Documentation/filesystems/Makefile
+++ b/Documentation/filesystems/Makefile
@@ -1,6 +1,3 @@
-# kbuild trick to avoid linker error. Can be omitted if a module is built.
-obj- := dummy.o
-
 # List of programs to build
 hostprogs-y := dnotify_test
 
diff --git a/Documentation/ia64/Makefile b/Documentation/ia64/Makefile
index b75db69ec483..d493163affe7 100644
--- a/Documentation/ia64/Makefile
+++ b/Documentation/ia64/Makefile
@@ -1,6 +1,3 @@
-# kbuild trick to avoid linker error. Can be omitted if a module is built.
-obj- := dummy.o
-
 # List of programs to build
 hostprogs-y := aliasing-test
 
diff --git a/Documentation/laptops/Makefile b/Documentation/laptops/Makefile
index 5cb144af3c09..0abe44f68965 100644
--- a/Documentation/laptops/Makefile
+++ b/Documentation/laptops/Makefile
@@ -1,6 +1,3 @@
-# kbuild trick to avoid linker error. Can be omitted if a module is built.
-obj- := dummy.o
-
 # List of programs to build
 hostprogs-y := dslm
 
diff --git a/Documentation/misc-devices/Makefile b/Documentation/misc-devices/Makefile
new file mode 100644
index 000000000000..e2b7aa4c9e21
--- /dev/null
+++ b/Documentation/misc-devices/Makefile
@@ -0,0 +1 @@
+subdir-y := mei
diff --git a/Documentation/misc-devices/mei/Makefile b/Documentation/misc-devices/mei/Makefile
index 00e8c3e836ff..d758047d1b6d 100644
--- a/Documentation/misc-devices/mei/Makefile
+++ b/Documentation/misc-devices/mei/Makefile
@@ -1,6 +1,3 @@
-# kbuild trick to avoid linker error. Can be omitted if a module is built.
-obj- := dummy.o
-
 # List of programs to build
 hostprogs-y := mei-amt-version
 HOSTCFLAGS_mei-amt-version.o += -I$(objtree)/usr/include
diff --git a/Documentation/networking/Makefile b/Documentation/networking/Makefile
index 0aa1ac98fc2b..4c5d7c485439 100644
--- a/Documentation/networking/Makefile
+++ b/Documentation/networking/Makefile
@@ -1,7 +1 @@
-# kbuild trick to avoid linker error. Can be omitted if a module is built.
-obj- := dummy.o
-
-# Tell kbuild to always build the programs
-always := $(hostprogs-y)
-
-obj-m := timestamping/
+subdir-y := timestamping
diff --git a/Documentation/networking/timestamping/Makefile b/Documentation/networking/timestamping/Makefile
index d934afc8306a..bbe6f810535d 100644
--- a/Documentation/networking/timestamping/Makefile
+++ b/Documentation/networking/timestamping/Makefile
@@ -1,6 +1,3 @@
-# kbuild trick to avoid linker error. Can be omitted if a module is built.
-obj- := dummy.o
-
 # List of programs to build
 hostprogs-y := timestamping hwtstamp_config
 
diff --git a/Documentation/pcmcia/Makefile b/Documentation/pcmcia/Makefile
index accde871ae77..47a8fa162683 100644
--- a/Documentation/pcmcia/Makefile
+++ b/Documentation/pcmcia/Makefile
@@ -1,6 +1,3 @@
-# kbuild trick to avoid linker error. Can be omitted if a module is built.
-obj- := dummy.o
-
 # List of programs to build
 hostprogs-y := crc32hash
 
diff --git a/Documentation/spi/Makefile b/Documentation/spi/Makefile
index a5b03c88beae..efa255813e9d 100644
--- a/Documentation/spi/Makefile
+++ b/Documentation/spi/Makefile
@@ -1,6 +1,3 @@
-# kbuild trick to avoid linker error. Can be omitted if a module is built.
-obj- := dummy.o
-
 # List of programs to build
 hostprogs-y := spidev_test spidev_fdx
 
diff --git a/Documentation/timers/Makefile b/Documentation/timers/Makefile
index 73f75f8a87dc..6c09ee6ca721 100644
--- a/Documentation/timers/Makefile
+++ b/Documentation/timers/Makefile
@@ -1,6 +1,3 @@
-# kbuild trick to avoid linker error. Can be omitted if a module is built.
-obj- := dummy.o
-
 # List of programs to build
 hostprogs-$(CONFIG_X86) := hpet_example
 
diff --git a/Documentation/watchdog/Makefile b/Documentation/watchdog/Makefile
new file mode 100644
index 000000000000..6018f45f2471
--- /dev/null
+++ b/Documentation/watchdog/Makefile
@@ -0,0 +1 @@
+subdir-y := src
diff --git a/Documentation/watchdog/src/Makefile b/Documentation/watchdog/src/Makefile
index 40e5f46e4740..4a892c304983 100644
--- a/Documentation/watchdog/src/Makefile
+++ b/Documentation/watchdog/src/Makefile
@@ -1,6 +1,3 @@
-# kbuild trick to avoid linker error. Can be omitted if a module is built.
-obj- := dummy.o
-
 # List of programs to build
 hostprogs-y := watchdog-simple watchdog-test