[PATCH 1/3] staging/ad7606: Actually build the interface modules

[PATCH 1/3] staging/ad7606: Actually build the interface modules

[Michal Marek]

From: Michal Marek <mmarek@suse.com>

The ad7606_par and ad7606_spi drivers are not built if CONFIG_AD7606=m,
because kbuild does not currently support <objname>-m syntax. Even if we
add kbuild support, ad7606 fails to link, because of duplicate
module_init definitions. Make the two drivers separate modules, as the
Kconfig help text already suggests.

Also, CONFIG_IIO_BUFFER is a dependency of CONFIG_AD7606, so there is no
need to test for it in the Makefile.

Cc: Michael Hennerich <Michael.Hennerich@analog.com>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Michal Marek <mmarek@suse.com>
---
 drivers/staging/iio/adc/Kconfig       | 4 ++--
 drivers/staging/iio/adc/Makefile      | 7 +++----
 drivers/staging/iio/adc/ad7606_core.c | 4 ++++
 3 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/drivers/staging/iio/adc/Kconfig b/drivers/staging/iio/adc/Kconfig
index 94ae423..58d4517 100644
--- a/drivers/staging/iio/adc/Kconfig
+++ b/drivers/staging/iio/adc/Kconfig
@@ -23,7 +23,7 @@ config AD7606_IFACE_PARALLEL
 	  ADC driver.
 
 	  To compile this driver as a module, choose M here: the
-	  module will be called ad7606_iface_parallel.
+	  module will be called ad7606_parallel.
 
 config AD7606_IFACE_SPI
 	tristate "spi interface support"
@@ -34,7 +34,7 @@ config AD7606_IFACE_SPI
 	  ADC driver.
 
 	  To compile this driver as a module, choose M here: the
-	  module will be called ad7606_iface_spi.
+	  module will be called ad7606_spi.
 
 config AD7780
 	tristate "Analog Devices AD7780 and similar ADCs driver"
diff --git a/drivers/staging/iio/adc/Makefile b/drivers/staging/iio/adc/Makefile
index 1c4277d..0c87ce3 100644
--- a/drivers/staging/iio/adc/Makefile
+++ b/drivers/staging/iio/adc/Makefile
@@ -2,10 +2,9 @@
 # Makefile for industrial I/O ADC drivers
 #
 
-ad7606-y := ad7606_core.o
-ad7606-$(CONFIG_IIO_BUFFER) += ad7606_ring.o
-ad7606-$(CONFIG_AD7606_IFACE_PARALLEL) += ad7606_par.o
-ad7606-$(CONFIG_AD7606_IFACE_SPI) += ad7606_spi.o
+ad7606-y := ad7606_core.o ad7606_ring.o
+obj-$(CONFIG_AD7606_IFACE_PARALLEL) += ad7606_par.o
+obj-$(CONFIG_AD7606_IFACE_SPI) += ad7606_spi.o
 obj-$(CONFIG_AD7606) += ad7606.o
 
 obj-$(CONFIG_AD7780) += ad7780.o
diff --git a/drivers/staging/iio/adc/ad7606_core.c b/drivers/staging/iio/adc/ad7606_core.c
index 5796ed2..2c9d8b7 100644
--- a/drivers/staging/iio/adc/ad7606_core.c
+++ b/drivers/staging/iio/adc/ad7606_core.c
@@ -559,6 +559,7 @@ error_disable_reg:
 		regulator_disable(st->reg);
 	return ERR_PTR(ret);
 }
+EXPORT_SYMBOL_GPL(ad7606_probe);
 
 int ad7606_remove(struct iio_dev *indio_dev, int irq)
 {
@@ -575,6 +576,7 @@ int ad7606_remove(struct iio_dev *indio_dev, int irq)
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(ad7606_remove);
 
 void ad7606_suspend(struct iio_dev *indio_dev)
 {
@@ -586,6 +588,7 @@ void ad7606_suspend(struct iio_dev *indio_dev)
 		gpio_set_value(st->pdata->gpio_stby, 0);
 	}
 }
+EXPORT_SYMBOL_GPL(ad7606_suspend);
 
 void ad7606_resume(struct iio_dev *indio_dev)
 {
@@ -600,6 +603,7 @@ void ad7606_resume(struct iio_dev *indio_dev)
 		ad7606_reset(st);
 	}
 }
+EXPORT_SYMBOL_GPL(ad7606_resume);
 
 MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
 MODULE_DESCRIPTION("Analog Devices AD7606 ADC");
-- 
1.9.2

[PATCH 2/3] kbuild: Allow to specify composite modules with modname-m

[Michal Marek]

From: Michal Marek <mmarek@suse.com>

This allows to write

  drm-$(CONFIG_AGP) += drm_agpsupport.o

without having to handle CONFIG_AGP=y vs. CONFIG_AGP=m. Only support
this syntax for modules, since built-in code depending on something
modular cannot work and init/Makefile actually relies on the current
semantics. There are a few drivers which adapted to the current
semantics out of necessity; these are fixed to also work when the
respective subsystem is modular.

Cc: Peter Chen <Peter.Chen@freescale.com>
Cc: linux-usb@vger.kernel.org
Cc: Joern Engel <joern@logfs.org>
Cc: Prasad Joshi <prasadjoshi.linux@gmail.com>
Cc: logfs@logfs.org
Signed-off-by: Michal Marek <mmarek@suse.com>
---
 drivers/misc/ibmasm/ibmasm.h   | 2 +-
 drivers/usb/chipidea/otg_fsm.h | 2 +-
 fs/logfs/logfs.h               | 2 +-
 scripts/Makefile.build         | 8 ++++++--
 scripts/Makefile.lib           | 4 ++--
 5 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/drivers/misc/ibmasm/ibmasm.h b/drivers/misc/ibmasm/ibmasm.h
index 9b08344..5bd1277 100644
--- a/drivers/misc/ibmasm/ibmasm.h
+++ b/drivers/misc/ibmasm/ibmasm.h
@@ -211,7 +211,7 @@ void ibmasmfs_unregister(void);
 void ibmasmfs_add_sp(struct service_processor *sp);
 
 /* uart */
-#ifdef CONFIG_SERIAL_8250
+#if IS_ENABLED(CONFIG_SERIAL_8250)
 void ibmasm_register_uart(struct service_processor *sp);
 void ibmasm_unregister_uart(struct service_processor *sp);
 #else
diff --git a/drivers/usb/chipidea/otg_fsm.h b/drivers/usb/chipidea/otg_fsm.h
index 2689375..262d6ef 100644
--- a/drivers/usb/chipidea/otg_fsm.h
+++ b/drivers/usb/chipidea/otg_fsm.h
@@ -62,7 +62,7 @@
 /* SSEND time before SRP */
 #define TB_SSEND_SRP         (1500)	/* minimum 1.5 sec, section:5.1.2 */
 
-#ifdef CONFIG_USB_OTG_FSM
+#if IS_ENABLED(CONFIG_USB_OTG_FSM)
 
 int ci_hdrc_otg_fsm_init(struct ci_hdrc *ci);
 int ci_otg_fsm_work(struct ci_hdrc *ci);
diff --git a/fs/logfs/logfs.h b/fs/logfs/logfs.h
index 5f09376..23f961a 100644
--- a/fs/logfs/logfs.h
+++ b/fs/logfs/logfs.h
@@ -485,7 +485,7 @@ static inline int logfs_get_sb_bdev(struct logfs_super *s,
 #endif
 
 /* dev_mtd.c */
-#ifdef CONFIG_MTD
+#if IS_ENABLED(CONFIG_MTD)
 int logfs_get_sb_mtd(struct logfs_super *s, int mtdnr);
 #else
 static inline int logfs_get_sb_mtd(struct logfs_super *s, int mtdnr)
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 01df30a..2c47f9c 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -372,10 +372,14 @@ endif
 #    <composite-object>-objs := <list of .o files>
 #  or
 #    <composite-object>-y    := <list of .o files>
+#  or
+#    <composite-object>-m    := <list of .o files>
+#  The -m syntax only works if <composite object> is a module
 link_multi_deps =                     \
 $(filter $(addprefix $(obj)/,         \
 $($(subst $(obj)/,,$(@:.o=-objs)))    \
-$($(subst $(obj)/,,$(@:.o=-y)))), $^)
+$($(subst $(obj)/,,$(@:.o=-y)))       \
+$($(subst $(obj)/,,$(@:.o=-m)))), $^)
 
 quiet_cmd_link_multi-y = LD      $@
 cmd_link_multi-y = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secanalysis)
@@ -390,7 +394,7 @@ $(call multi_depend, $(multi-used-y), .o, -objs -y)
 $(multi-used-m): FORCE
 	$(call if_changed,link_multi-m)
 	@{ echo $(@:.o=.ko); echo $(link_multi_deps); } > $(MODVERDIR)/$(@F:.o=.mod)
-$(call multi_depend, $(multi-used-m), .o, -objs -y)
+$(call multi_depend, $(multi-used-m), .o, -objs -y -m)
 
 targets += $(multi-used-y) $(multi-used-m)
 
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 79e8661..e18957b 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -48,7 +48,7 @@ subdir-ym	:= $(sort $(subdir-y) $(subdir-m))
 
 # if $(foo-objs) exists, foo.o is a composite object
 multi-used-y := $(sort $(foreach m,$(obj-y), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))), $(m))))
-multi-used-m := $(sort $(foreach m,$(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))), $(m))))
+multi-used-m := $(sort $(foreach m,$(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m))), $(m))))
 multi-used   := $(multi-used-y) $(multi-used-m)
 single-used-m := $(sort $(filter-out $(multi-used-m),$(obj-m)))
 
@@ -67,7 +67,7 @@ obj-dirs := $(dir $(multi-objs) $(obj-y))
 
 # Replace multi-part objects by their individual parts, look at local dir only
 real-objs-y := $(foreach m, $(filter-out $(subdir-obj-y), $(obj-y)), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m))) $(extra-y)
-real-objs-m := $(foreach m, $(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m)))
+real-objs-m := $(foreach m, $(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m))),$($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m)),$(m)))
 
 # Add subdir path
 
-- 
1.9.2

[PATCH 3/3] Revert "drm: Hack around CONFIG_AGP=m build failures"

[Michal Marek]

From: Michal Marek <mmarek@suse.com>

Kbuild now supports <modname>-m variables.

This reverts commit 8fa884dc355ffd0caa964a284a530bf747df5c77.

Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Michal Marek <mmarek@suse.cz>
---
 drivers/gpu/drm/Makefile | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
index e814517..f458d6e 100644
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -21,8 +21,6 @@ drm-$(CONFIG_DRM_PANEL) += drm_panel.o
 drm-$(CONFIG_OF) += drm_of.o
 drm-$(CONFIG_AGP) += drm_agpsupport.o
 
-drm-y += $(drm-m)
-
 drm_kms_helper-y := drm_crtc_helper.o drm_dp_helper.o drm_probe_helper.o \
 		drm_plane_helper.o drm_dp_mst_topology.o drm_atomic_helper.o
 drm_kms_helper-$(CONFIG_DRM_LOAD_EDID_FIRMWARE) += drm_edid_load.o
-- 
1.9.2

Re: [PATCH 2/3] kbuild: Allow to specify composite modules with modname-m

[Peter Chen]

On Wed, Oct 28, 2015 at 02:25:41PM +0100, Michal Marek wrote:
> From: Michal Marek <mmarek@suse.com>
> 
> This allows to write
> 
>   drm-$(CONFIG_AGP) += drm_agpsupport.o
> 
> without having to handle CONFIG_AGP=y vs. CONFIG_AGP=m. Only support
> this syntax for modules, since built-in code depending on something
> modular cannot work and init/Makefile actually relies on the current
> semantics. There are a few drivers which adapted to the current
> semantics out of necessity; these are fixed to also work when the
> respective subsystem is modular.
> 
> Cc: Peter Chen <Peter.Chen@freescale.com>
> Cc: linux-usb@vger.kernel.org
> Cc: Joern Engel <joern@logfs.org>
> Cc: Prasad Joshi <prasadjoshi.linux@gmail.com>
> Cc: logfs@logfs.org
> Signed-off-by: Michal Marek <mmarek@suse.com>
> ---
>  drivers/misc/ibmasm/ibmasm.h   | 2 +-
>  drivers/usb/chipidea/otg_fsm.h | 2 +-
>  fs/logfs/logfs.h               | 2 +-
>  scripts/Makefile.build         | 8 ++++++--
>  scripts/Makefile.lib           | 4 ++--
>  5 files changed, 11 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/misc/ibmasm/ibmasm.h b/drivers/misc/ibmasm/ibmasm.h
> index 9b08344..5bd1277 100644
> --- a/drivers/misc/ibmasm/ibmasm.h
> +++ b/drivers/misc/ibmasm/ibmasm.h
> @@ -211,7 +211,7 @@ void ibmasmfs_unregister(void);
>  void ibmasmfs_add_sp(struct service_processor *sp);
>  
>  /* uart */
> -#ifdef CONFIG_SERIAL_8250
> +#if IS_ENABLED(CONFIG_SERIAL_8250)
>  void ibmasm_register_uart(struct service_processor *sp);
>  void ibmasm_unregister_uart(struct service_processor *sp);
>  #else
> diff --git a/drivers/usb/chipidea/otg_fsm.h b/drivers/usb/chipidea/otg_fsm.h
> index 2689375..262d6ef 100644
> --- a/drivers/usb/chipidea/otg_fsm.h
> +++ b/drivers/usb/chipidea/otg_fsm.h
> @@ -62,7 +62,7 @@
>  /* SSEND time before SRP */
>  #define TB_SSEND_SRP         (1500)	/* minimum 1.5 sec, section:5.1.2 */
>  
> -#ifdef CONFIG_USB_OTG_FSM
> +#if IS_ENABLED(CONFIG_USB_OTG_FSM)

Does it mean if the configuration is tristate, it must use IS_ENABLED?

Peter
>  
>  int ci_hdrc_otg_fsm_init(struct ci_hdrc *ci);
>  int ci_otg_fsm_work(struct ci_hdrc *ci);
> diff --git a/fs/logfs/logfs.h b/fs/logfs/logfs.h
> index 5f09376..23f961a 100644
> --- a/fs/logfs/logfs.h
> +++ b/fs/logfs/logfs.h
> @@ -485,7 +485,7 @@ static inline int logfs_get_sb_bdev(struct logfs_super *s,
>  #endif
>  
>  /* dev_mtd.c */
> -#ifdef CONFIG_MTD
> +#if IS_ENABLED(CONFIG_MTD)
>  int logfs_get_sb_mtd(struct logfs_super *s, int mtdnr);
>  #else
>  static inline int logfs_get_sb_mtd(struct logfs_super *s, int mtdnr)
> diff --git a/scripts/Makefile.build b/scripts/Makefile.build
> index 01df30a..2c47f9c 100644
> --- a/scripts/Makefile.build
> +++ b/scripts/Makefile.build
> @@ -372,10 +372,14 @@ endif
>  #    <composite-object>-objs := <list of .o files>
>  #  or
>  #    <composite-object>-y    := <list of .o files>
> +#  or
> +#    <composite-object>-m    := <list of .o files>
> +#  The -m syntax only works if <composite object> is a module
>  link_multi_deps =                     \
>  $(filter $(addprefix $(obj)/,         \
>  $($(subst $(obj)/,,$(@:.o=-objs)))    \
> -$($(subst $(obj)/,,$(@:.o=-y)))), $^)
> +$($(subst $(obj)/,,$(@:.o=-y)))       \
> +$($(subst $(obj)/,,$(@:.o=-m)))), $^)
>  
>  quiet_cmd_link_multi-y = LD      $@
>  cmd_link_multi-y = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secanalysis)
> @@ -390,7 +394,7 @@ $(call multi_depend, $(multi-used-y), .o, -objs -y)
>  $(multi-used-m): FORCE
>  	$(call if_changed,link_multi-m)
>  	@{ echo $(@:.o=.ko); echo $(link_multi_deps); } > $(MODVERDIR)/$(@F:.o=.mod)
> -$(call multi_depend, $(multi-used-m), .o, -objs -y)
> +$(call multi_depend, $(multi-used-m), .o, -objs -y -m)
>  
>  targets += $(multi-used-y) $(multi-used-m)
>  
> diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
> index 79e8661..e18957b 100644
> --- a/scripts/Makefile.lib
> +++ b/scripts/Makefile.lib
> @@ -48,7 +48,7 @@ subdir-ym	:= $(sort $(subdir-y) $(subdir-m))
>  
>  # if $(foo-objs) exists, foo.o is a composite object
>  multi-used-y := $(sort $(foreach m,$(obj-y), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))), $(m))))
> -multi-used-m := $(sort $(foreach m,$(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))), $(m))))
> +multi-used-m := $(sort $(foreach m,$(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m))), $(m))))
>  multi-used   := $(multi-used-y) $(multi-used-m)
>  single-used-m := $(sort $(filter-out $(multi-used-m),$(obj-m)))
>  
> @@ -67,7 +67,7 @@ obj-dirs := $(dir $(multi-objs) $(obj-y))
>  
>  # Replace multi-part objects by their individual parts, look at local dir only
>  real-objs-y := $(foreach m, $(filter-out $(subdir-obj-y), $(obj-y)), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m))) $(extra-y)
> -real-objs-m := $(foreach m, $(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m)))
> +real-objs-m := $(foreach m, $(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m))),$($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m)),$(m)))
>  
>  # Add subdir path
>  
> -- 
> 1.9.2
> 

-- 

Best Regards,
Peter Chen

Re: [PATCH 2/3] kbuild: Allow to specify composite modules with modname-m

[Michal Marek]

Dne 29.10.2015 v 07:34 Peter Chen napsal(a):
> On Wed, Oct 28, 2015 at 02:25:41PM +0100, Michal Marek wrote:
>> From: Michal Marek <mmarek@suse.com>
>>
>> This allows to write
>>
>>   drm-$(CONFIG_AGP) += drm_agpsupport.o
>>
>> without having to handle CONFIG_AGP=y vs. CONFIG_AGP=m. Only support
>> this syntax for modules, since built-in code depending on something
>> modular cannot work and init/Makefile actually relies on the current
>> semantics. There are a few drivers which adapted to the current
>> semantics out of necessity; these are fixed to also work when the
>> respective subsystem is modular.
>>
>> Cc: Peter Chen <Peter.Chen@freescale.com>
>> Cc: linux-usb@vger.kernel.org
>> Cc: Joern Engel <joern@logfs.org>
>> Cc: Prasad Joshi <prasadjoshi.linux@gmail.com>
>> Cc: logfs@logfs.org
>> Signed-off-by: Michal Marek <mmarek@suse.com>
>> ---
>>  drivers/misc/ibmasm/ibmasm.h   | 2 +-
>>  drivers/usb/chipidea/otg_fsm.h | 2 +-
>>  fs/logfs/logfs.h               | 2 +-
>>  scripts/Makefile.build         | 8 ++++++--
>>  scripts/Makefile.lib           | 4 ++--
>>  5 files changed, 11 insertions(+), 7 deletions(-)
>>
>> diff --git a/drivers/misc/ibmasm/ibmasm.h b/drivers/misc/ibmasm/ibmasm.h
>> index 9b08344..5bd1277 100644
>> --- a/drivers/misc/ibmasm/ibmasm.h
>> +++ b/drivers/misc/ibmasm/ibmasm.h
>> @@ -211,7 +211,7 @@ void ibmasmfs_unregister(void);
>>  void ibmasmfs_add_sp(struct service_processor *sp);
>>  
>>  /* uart */
>> -#ifdef CONFIG_SERIAL_8250
>> +#if IS_ENABLED(CONFIG_SERIAL_8250)
>>  void ibmasm_register_uart(struct service_processor *sp);
>>  void ibmasm_unregister_uart(struct service_processor *sp);
>>  #else
>> diff --git a/drivers/usb/chipidea/otg_fsm.h b/drivers/usb/chipidea/otg_fsm.h
>> index 2689375..262d6ef 100644
>> --- a/drivers/usb/chipidea/otg_fsm.h
>> +++ b/drivers/usb/chipidea/otg_fsm.h
>> @@ -62,7 +62,7 @@
>>  /* SSEND time before SRP */
>>  #define TB_SSEND_SRP         (1500)	/* minimum 1.5 sec, section:5.1.2 */
>>  
>> -#ifdef CONFIG_USB_OTG_FSM
>> +#if IS_ENABLED(CONFIG_USB_OTG_FSM)
> 
> Does it mean if the configuration is tristate, it must use IS_ENABLED?

IS_ENABLED is a shortcut for defined(CONFIG_FOO) ||
defined(CONFIG_FOO_MODULE). In other words, it makes sure the that otg
fsm functions are used for both CONFIG_USB_OTG_FSM=y and
CONFIG_USB_OTG_FSM=m.

Michal

Re: [PATCH 2/3] kbuild: Allow to specify composite modules with modname-m

[Peter Chen]

On Thu, Oct 29, 2015 at 09:05:55AM +0100, Michal Marek wrote:
> Dne 29.10.2015 v 07:34 Peter Chen napsal(a):
> > On Wed, Oct 28, 2015 at 02:25:41PM +0100, Michal Marek wrote:
> >> From: Michal Marek <mmarek@suse.com>
> >>
> >> This allows to write
> >>
> >>   drm-$(CONFIG_AGP) += drm_agpsupport.o
> >>
> >> without having to handle CONFIG_AGP=y vs. CONFIG_AGP=m. Only support
> >> this syntax for modules, since built-in code depending on something
> >> modular cannot work and init/Makefile actually relies on the current
> >> semantics. There are a few drivers which adapted to the current
> >> semantics out of necessity; these are fixed to also work when the
> >> respective subsystem is modular.
> >>
> >> Cc: Peter Chen <Peter.Chen@freescale.com>
> >> Cc: linux-usb@vger.kernel.org
> >> Cc: Joern Engel <joern@logfs.org>
> >> Cc: Prasad Joshi <prasadjoshi.linux@gmail.com>
> >> Cc: logfs@logfs.org
> >> Signed-off-by: Michal Marek <mmarek@suse.com>
> >> ---
> >>  drivers/misc/ibmasm/ibmasm.h   | 2 +-
> >>  drivers/usb/chipidea/otg_fsm.h | 2 +-
> >>  fs/logfs/logfs.h               | 2 +-
> >>  scripts/Makefile.build         | 8 ++++++--
> >>  scripts/Makefile.lib           | 4 ++--
> >>  5 files changed, 11 insertions(+), 7 deletions(-)
> >>
> >> diff --git a/drivers/misc/ibmasm/ibmasm.h b/drivers/misc/ibmasm/ibmasm.h
> >> index 9b08344..5bd1277 100644
> >> --- a/drivers/misc/ibmasm/ibmasm.h
> >> +++ b/drivers/misc/ibmasm/ibmasm.h
> >> @@ -211,7 +211,7 @@ void ibmasmfs_unregister(void);
> >>  void ibmasmfs_add_sp(struct service_processor *sp);
> >>  
> >>  /* uart */
> >> -#ifdef CONFIG_SERIAL_8250
> >> +#if IS_ENABLED(CONFIG_SERIAL_8250)
> >>  void ibmasm_register_uart(struct service_processor *sp);
> >>  void ibmasm_unregister_uart(struct service_processor *sp);
> >>  #else
> >> diff --git a/drivers/usb/chipidea/otg_fsm.h b/drivers/usb/chipidea/otg_fsm.h
> >> index 2689375..262d6ef 100644
> >> --- a/drivers/usb/chipidea/otg_fsm.h
> >> +++ b/drivers/usb/chipidea/otg_fsm.h
> >> @@ -62,7 +62,7 @@
> >>  /* SSEND time before SRP */
> >>  #define TB_SSEND_SRP         (1500)	/* minimum 1.5 sec, section:5.1.2 */
> >>  
> >> -#ifdef CONFIG_USB_OTG_FSM
> >> +#if IS_ENABLED(CONFIG_USB_OTG_FSM)
> > 
> > Does it mean if the configuration is tristate, it must use IS_ENABLED?
> 
> IS_ENABLED is a shortcut for defined(CONFIG_FOO) ||
> defined(CONFIG_FOO_MODULE). In other words, it makes sure the that otg
> fsm functions are used for both CONFIG_USB_OTG_FSM=y and
> CONFIG_USB_OTG_FSM=m.
> 
> Michal
> 

For chipidea changes:
Acked-by: Peter Chen <peter.chen@freescale.com>

-- 

Best Regards,
Peter Chen

Re: [PATCH 2/3] kbuild: Allow to specify composite modules with modname-m

[Michal Marek]

Dne 28.10.2015 v 14:25 Michal Marek napsal(a):
> From: Michal Marek <mmarek@suse.com>
> 
> This allows to write
> 
>   drm-$(CONFIG_AGP) += drm_agpsupport.o
> 
> without having to handle CONFIG_AGP=y vs. CONFIG_AGP=m. Only support
> this syntax for modules, since built-in code depending on something
> modular cannot work and init/Makefile actually relies on the current
> semantics. There are a few drivers which adapted to the current
> semantics out of necessity; these are fixed to also work when the
> respective subsystem is modular.
> 
> Cc: Peter Chen <Peter.Chen@freescale.com>
> Cc: linux-usb@vger.kernel.org
> Cc: Joern Engel <joern@logfs.org>
> Cc: Prasad Joshi <prasadjoshi.linux@gmail.com>
> Cc: logfs@logfs.org
> Signed-off-by: Michal Marek <mmarek@suse.com>
> ---
>  drivers/misc/ibmasm/ibmasm.h   | 2 +-
>  drivers/usb/chipidea/otg_fsm.h | 2 +-
>  fs/logfs/logfs.h               | 2 +-
>  scripts/Makefile.build         | 8 ++++++--
>  scripts/Makefile.lib           | 4 ++--
>  5 files changed, 11 insertions(+), 7 deletions(-)

I applied the whole series to kbuild.git#kbuild now.

Michal