soundwire: Don't build sound.o without CONFIG_ACPI
diff mbox series

Message ID 20190813061014.45015-1-natechancellor@gmail.com
State New
Headers show
Series
  • soundwire: Don't build sound.o without CONFIG_ACPI
Related show

Commit Message

Nathan Chancellor Aug. 13, 2019, 6:10 a.m. UTC
clang warns when CONFIG_ACPI is unset:

../drivers/soundwire/slave.c:16:12: warning: unused function
'sdw_slave_add' [-Wunused-function]
static int sdw_slave_add(struct sdw_bus *bus,
           ^
1 warning generated.

Before commit 8676b3ca4673 ("soundwire: fix regmap dependencies and
align with other serial links"), this code would only be compiled when
ACPI was set because it was only selected by SOUNDWIRE_INTEL, which
depends on ACPI.

Now, this code can be compiled without CONFIG_ACPI, which causes the
above warning. The IS_ENABLED(CONFIG_ACPI) guard could be moved to avoid
compiling the function; however, slave.c only contains three functions,
two of which are static. Only compile slave.o when CONFIG_ACPI is set,
where it will actually be used. bus.h contains a stub for
sdw_acpi_find_slaves so there will be no issues with an undefined
function.

This has been build tested with CONFIG_ACPI set and unset in combination
with CONFIG_SOUNDWIRE unset, built in, and a module.

Fixes: 8676b3ca4673 ("soundwire: fix regmap dependencies and align with other serial links")
Link: https://github.com/ClangBuiltLinux/linux/issues/637
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
---
 drivers/soundwire/Makefile | 6 +++++-
 drivers/soundwire/slave.c  | 3 ---
 2 files changed, 5 insertions(+), 4 deletions(-)

Comments

Pierre-Louis Bossart Aug. 13, 2019, 2:22 p.m. UTC | #1
On 8/13/19 1:10 AM, Nathan Chancellor wrote:
> clang warns when CONFIG_ACPI is unset:
> 
> ../drivers/soundwire/slave.c:16:12: warning: unused function
> 'sdw_slave_add' [-Wunused-function]
> static int sdw_slave_add(struct sdw_bus *bus,
>             ^
> 1 warning generated.
> 
> Before commit 8676b3ca4673 ("soundwire: fix regmap dependencies and
> align with other serial links"), this code would only be compiled when
> ACPI was set because it was only selected by SOUNDWIRE_INTEL, which
> depends on ACPI.
> 
> Now, this code can be compiled without CONFIG_ACPI, which causes the
> above warning. The IS_ENABLED(CONFIG_ACPI) guard could be moved to avoid
> compiling the function; however, slave.c only contains three functions,
> two of which are static. Only compile slave.o when CONFIG_ACPI is set,
> where it will actually be used. bus.h contains a stub for
> sdw_acpi_find_slaves so there will be no issues with an undefined
> function.
> 
> This has been build tested with CONFIG_ACPI set and unset in combination
> with CONFIG_SOUNDWIRE unset, built in, and a module.

Thanks for the patch. Do you have a .config you can share offline so 
that we add it to our tests?

> 
> Fixes: 8676b3ca4673 ("soundwire: fix regmap dependencies and align with other serial links")
> Link: https://github.com/ClangBuiltLinux/linux/issues/637
> Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
> ---
>   drivers/soundwire/Makefile | 6 +++++-
>   drivers/soundwire/slave.c  | 3 ---
>   2 files changed, 5 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/soundwire/Makefile b/drivers/soundwire/Makefile
> index 45b7e5001653..226090902716 100644
> --- a/drivers/soundwire/Makefile
> +++ b/drivers/soundwire/Makefile
> @@ -4,9 +4,13 @@
>   #
>   
>   #Bus Objs
> -soundwire-bus-objs := bus_type.o bus.o slave.o mipi_disco.o stream.o
> +soundwire-bus-objs := bus_type.o bus.o mipi_disco.o stream.o
>   obj-$(CONFIG_SOUNDWIRE) += soundwire-bus.o
>   
> +ifdef CONFIG_ACPI
> +soundwire-bus-objs += slave.o
> +endif

I am fine with the change, but we might as well rename the file 
acpi_slave.c then?

> +
>   #Cadence Objs
>   soundwire-cadence-objs := cadence_master.o
>   obj-$(CONFIG_SOUNDWIRE_CADENCE) += soundwire-cadence.o
> diff --git a/drivers/soundwire/slave.c b/drivers/soundwire/slave.c
> index f39a5815e25d..0dc188e6873b 100644
> --- a/drivers/soundwire/slave.c
> +++ b/drivers/soundwire/slave.c
> @@ -60,7 +60,6 @@ static int sdw_slave_add(struct sdw_bus *bus,
>   	return ret;
>   }
>   
> -#if IS_ENABLED(CONFIG_ACPI)
>   /*
>    * sdw_acpi_find_slaves() - Find Slave devices in Master ACPI node
>    * @bus: SDW bus instance
> @@ -110,5 +109,3 @@ int sdw_acpi_find_slaves(struct sdw_bus *bus)
>   
>   	return 0;
>   }
> -
> -#endif
>
Nathan Chancellor Aug. 13, 2019, 5:39 p.m. UTC | #2
On Tue, Aug 13, 2019 at 09:22:29AM -0500, Pierre-Louis Bossart wrote:
> On 8/13/19 1:10 AM, Nathan Chancellor wrote:
> > clang warns when CONFIG_ACPI is unset:
> > 
> > ../drivers/soundwire/slave.c:16:12: warning: unused function
> > 'sdw_slave_add' [-Wunused-function]
> > static int sdw_slave_add(struct sdw_bus *bus,
> >             ^
> > 1 warning generated.
> > 
> > Before commit 8676b3ca4673 ("soundwire: fix regmap dependencies and
> > align with other serial links"), this code would only be compiled when
> > ACPI was set because it was only selected by SOUNDWIRE_INTEL, which
> > depends on ACPI.
> > 
> > Now, this code can be compiled without CONFIG_ACPI, which causes the
> > above warning. The IS_ENABLED(CONFIG_ACPI) guard could be moved to avoid
> > compiling the function; however, slave.c only contains three functions,
> > two of which are static. Only compile slave.o when CONFIG_ACPI is set,
> > where it will actually be used. bus.h contains a stub for
> > sdw_acpi_find_slaves so there will be no issues with an undefined
> > function.
> > 
> > This has been build tested with CONFIG_ACPI set and unset in combination
> > with CONFIG_SOUNDWIRE unset, built in, and a module.
> 
> Thanks for the patch. Do you have a .config you can share offline so that we
> add it to our tests?

I just took the arm64 defconfig and deleted CONFIG_ACPI and added
CONFIG_SOUNDWIRE=y or =m to produce this warning. I initially found this
on an arm64 allyesconfig build.

> 
> > 
> > Fixes: 8676b3ca4673 ("soundwire: fix regmap dependencies and align with other serial links")
> > Link: https://github.com/ClangBuiltLinux/linux/issues/637
> > Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
> > ---
> >   drivers/soundwire/Makefile | 6 +++++-
> >   drivers/soundwire/slave.c  | 3 ---
> >   2 files changed, 5 insertions(+), 4 deletions(-)
> > 
> > diff --git a/drivers/soundwire/Makefile b/drivers/soundwire/Makefile
> > index 45b7e5001653..226090902716 100644
> > --- a/drivers/soundwire/Makefile
> > +++ b/drivers/soundwire/Makefile
> > @@ -4,9 +4,13 @@
> >   #
> >   #Bus Objs
> > -soundwire-bus-objs := bus_type.o bus.o slave.o mipi_disco.o stream.o
> > +soundwire-bus-objs := bus_type.o bus.o mipi_disco.o stream.o
> >   obj-$(CONFIG_SOUNDWIRE) += soundwire-bus.o
> > +ifdef CONFIG_ACPI
> > +soundwire-bus-objs += slave.o
> > +endif
> 
> I am fine with the change, but we might as well rename the file acpi_slave.c
> then?

Sure, I can do that rename and send a v2.

> 
> > +
> >   #Cadence Objs
> >   soundwire-cadence-objs := cadence_master.o
> >   obj-$(CONFIG_SOUNDWIRE_CADENCE) += soundwire-cadence.o
> > diff --git a/drivers/soundwire/slave.c b/drivers/soundwire/slave.c
> > index f39a5815e25d..0dc188e6873b 100644
> > --- a/drivers/soundwire/slave.c
> > +++ b/drivers/soundwire/slave.c
> > @@ -60,7 +60,6 @@ static int sdw_slave_add(struct sdw_bus *bus,
> >   	return ret;
> >   }
> > -#if IS_ENABLED(CONFIG_ACPI)
> >   /*
> >    * sdw_acpi_find_slaves() - Find Slave devices in Master ACPI node
> >    * @bus: SDW bus instance
> > @@ -110,5 +109,3 @@ int sdw_acpi_find_slaves(struct sdw_bus *bus)
> >   	return 0;
> >   }
> > -
> > -#endif
> > 
>
Vinod Koul Aug. 14, 2019, 3:59 a.m. UTC | #3
On 13-08-19, 09:22, Pierre-Louis Bossart wrote:
> On 8/13/19 1:10 AM, Nathan Chancellor wrote:
> > clang warns when CONFIG_ACPI is unset:
> > 
> > ../drivers/soundwire/slave.c:16:12: warning: unused function
> > 'sdw_slave_add' [-Wunused-function]
> > static int sdw_slave_add(struct sdw_bus *bus,
> >             ^
> > 1 warning generated.
> > 
> > Before commit 8676b3ca4673 ("soundwire: fix regmap dependencies and
> > align with other serial links"), this code would only be compiled when
> > ACPI was set because it was only selected by SOUNDWIRE_INTEL, which
> > depends on ACPI.
> > 
> > Now, this code can be compiled without CONFIG_ACPI, which causes the
> > above warning. The IS_ENABLED(CONFIG_ACPI) guard could be moved to avoid
> > compiling the function; however, slave.c only contains three functions,
> > two of which are static. Only compile slave.o when CONFIG_ACPI is set,
> > where it will actually be used. bus.h contains a stub for
> > sdw_acpi_find_slaves so there will be no issues with an undefined
> > function.
> > 
> > This has been build tested with CONFIG_ACPI set and unset in combination
> > with CONFIG_SOUNDWIRE unset, built in, and a module.
> 
> Thanks for the patch. Do you have a .config you can share offline so that we
> add it to our tests?
> 
> > 
> > Fixes: 8676b3ca4673 ("soundwire: fix regmap dependencies and align with other serial links")
> > Link: https://github.com/ClangBuiltLinux/linux/issues/637
> > Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
> > ---
> >   drivers/soundwire/Makefile | 6 +++++-
> >   drivers/soundwire/slave.c  | 3 ---
> >   2 files changed, 5 insertions(+), 4 deletions(-)
> > 
> > diff --git a/drivers/soundwire/Makefile b/drivers/soundwire/Makefile
> > index 45b7e5001653..226090902716 100644
> > --- a/drivers/soundwire/Makefile
> > +++ b/drivers/soundwire/Makefile
> > @@ -4,9 +4,13 @@
> >   #
> >   #Bus Objs
> > -soundwire-bus-objs := bus_type.o bus.o slave.o mipi_disco.o stream.o
> > +soundwire-bus-objs := bus_type.o bus.o mipi_disco.o stream.o
> >   obj-$(CONFIG_SOUNDWIRE) += soundwire-bus.o
> > +ifdef CONFIG_ACPI
> > +soundwire-bus-objs += slave.o
> > +endif
> 
> I am fine with the change, but we might as well rename the file acpi_slave.c
> then?

Srini's change add support for DT for the same file, so It does not make
sense to rename. Yes this patch tries to fix a warn which is there due
to DT being not supported but with Srini's patches this warn should go
away as sdw_slave_add() will be invoked by the DT counterpart

Sorry Nathan, we would have to live with the warn for few more days till
I apply Srini's changes. So I am not taking this (or v2) patch

Thanks

> 
> > +
> >   #Cadence Objs
> >   soundwire-cadence-objs := cadence_master.o
> >   obj-$(CONFIG_SOUNDWIRE_CADENCE) += soundwire-cadence.o
> > diff --git a/drivers/soundwire/slave.c b/drivers/soundwire/slave.c
> > index f39a5815e25d..0dc188e6873b 100644
> > --- a/drivers/soundwire/slave.c
> > +++ b/drivers/soundwire/slave.c
> > @@ -60,7 +60,6 @@ static int sdw_slave_add(struct sdw_bus *bus,
> >   	return ret;
> >   }
> > -#if IS_ENABLED(CONFIG_ACPI)
> >   /*
> >    * sdw_acpi_find_slaves() - Find Slave devices in Master ACPI node
> >    * @bus: SDW bus instance
> > @@ -110,5 +109,3 @@ int sdw_acpi_find_slaves(struct sdw_bus *bus)
> >   	return 0;
> >   }
> > -
> > -#endif
> >
Nathan Chancellor Aug. 14, 2019, 4:24 a.m. UTC | #4
On Wed, Aug 14, 2019 at 09:29:47AM +0530, Vinod Koul wrote:
> On 13-08-19, 09:22, Pierre-Louis Bossart wrote:
> > On 8/13/19 1:10 AM, Nathan Chancellor wrote:
> > > clang warns when CONFIG_ACPI is unset:
> > > 
> > > ../drivers/soundwire/slave.c:16:12: warning: unused function
> > > 'sdw_slave_add' [-Wunused-function]
> > > static int sdw_slave_add(struct sdw_bus *bus,
> > >             ^
> > > 1 warning generated.
> > > 
> > > Before commit 8676b3ca4673 ("soundwire: fix regmap dependencies and
> > > align with other serial links"), this code would only be compiled when
> > > ACPI was set because it was only selected by SOUNDWIRE_INTEL, which
> > > depends on ACPI.
> > > 
> > > Now, this code can be compiled without CONFIG_ACPI, which causes the
> > > above warning. The IS_ENABLED(CONFIG_ACPI) guard could be moved to avoid
> > > compiling the function; however, slave.c only contains three functions,
> > > two of which are static. Only compile slave.o when CONFIG_ACPI is set,
> > > where it will actually be used. bus.h contains a stub for
> > > sdw_acpi_find_slaves so there will be no issues with an undefined
> > > function.
> > > 
> > > This has been build tested with CONFIG_ACPI set and unset in combination
> > > with CONFIG_SOUNDWIRE unset, built in, and a module.
> > 
> > Thanks for the patch. Do you have a .config you can share offline so that we
> > add it to our tests?
> > 
> > > 
> > > Fixes: 8676b3ca4673 ("soundwire: fix regmap dependencies and align with other serial links")
> > > Link: https://github.com/ClangBuiltLinux/linux/issues/637
> > > Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
> > > ---
> > >   drivers/soundwire/Makefile | 6 +++++-
> > >   drivers/soundwire/slave.c  | 3 ---
> > >   2 files changed, 5 insertions(+), 4 deletions(-)
> > > 
> > > diff --git a/drivers/soundwire/Makefile b/drivers/soundwire/Makefile
> > > index 45b7e5001653..226090902716 100644
> > > --- a/drivers/soundwire/Makefile
> > > +++ b/drivers/soundwire/Makefile
> > > @@ -4,9 +4,13 @@
> > >   #
> > >   #Bus Objs
> > > -soundwire-bus-objs := bus_type.o bus.o slave.o mipi_disco.o stream.o
> > > +soundwire-bus-objs := bus_type.o bus.o mipi_disco.o stream.o
> > >   obj-$(CONFIG_SOUNDWIRE) += soundwire-bus.o
> > > +ifdef CONFIG_ACPI
> > > +soundwire-bus-objs += slave.o
> > > +endif
> > 
> > I am fine with the change, but we might as well rename the file acpi_slave.c
> > then?
> 
> Srini's change add support for DT for the same file, so It does not make
> sense to rename. Yes this patch tries to fix a warn which is there due
> to DT being not supported but with Srini's patches this warn should go
> away as sdw_slave_add() will be invoked by the DT counterpart
> 
> Sorry Nathan, we would have to live with the warn for few more days till
> I apply Srini's changes. So I am not taking this (or v2) patch
> 

That is fine as I can apply this locally. Could you point me to these
patches so that I can take a look at them?

Thanks for the reply!
Nathan
Vinod Koul Aug. 14, 2019, 5:46 a.m. UTC | #5
On 13-08-19, 21:24, Nathan Chancellor wrote:
> On Wed, Aug 14, 2019 at 09:29:47AM +0530, Vinod Koul wrote:
> > On 13-08-19, 09:22, Pierre-Louis Bossart wrote:
> > > On 8/13/19 1:10 AM, Nathan Chancellor wrote:
 
> > > I am fine with the change, but we might as well rename the file acpi_slave.c
> > > then?
> > 
> > Srini's change add support for DT for the same file, so It does not make
> > sense to rename. Yes this patch tries to fix a warn which is there due
> > to DT being not supported but with Srini's patches this warn should go
> > away as sdw_slave_add() will be invoked by the DT counterpart
> > 
> > Sorry Nathan, we would have to live with the warn for few more days till
> > I apply Srini's changes. So I am not taking this (or v2) patch
> > 
> 
> That is fine as I can apply this locally. Could you point me to these
> patches so that I can take a look at them?

Here you go:

https://lore.kernel.org/lkml/20190808144504.24823-3-srinivas.kandagatla@linaro.org/

Patch
diff mbox series

diff --git a/drivers/soundwire/Makefile b/drivers/soundwire/Makefile
index 45b7e5001653..226090902716 100644
--- a/drivers/soundwire/Makefile
+++ b/drivers/soundwire/Makefile
@@ -4,9 +4,13 @@ 
 #
 
 #Bus Objs
-soundwire-bus-objs := bus_type.o bus.o slave.o mipi_disco.o stream.o
+soundwire-bus-objs := bus_type.o bus.o mipi_disco.o stream.o
 obj-$(CONFIG_SOUNDWIRE) += soundwire-bus.o
 
+ifdef CONFIG_ACPI
+soundwire-bus-objs += slave.o
+endif
+
 #Cadence Objs
 soundwire-cadence-objs := cadence_master.o
 obj-$(CONFIG_SOUNDWIRE_CADENCE) += soundwire-cadence.o
diff --git a/drivers/soundwire/slave.c b/drivers/soundwire/slave.c
index f39a5815e25d..0dc188e6873b 100644
--- a/drivers/soundwire/slave.c
+++ b/drivers/soundwire/slave.c
@@ -60,7 +60,6 @@  static int sdw_slave_add(struct sdw_bus *bus,
 	return ret;
 }
 
-#if IS_ENABLED(CONFIG_ACPI)
 /*
  * sdw_acpi_find_slaves() - Find Slave devices in Master ACPI node
  * @bus: SDW bus instance
@@ -110,5 +109,3 @@  int sdw_acpi_find_slaves(struct sdw_bus *bus)
 
 	return 0;
 }
-
-#endif