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Groups > linux.kernel > #1329014 > unrolled thread
| Started by | Arnd Bergmann <arnd@arndb.de> |
|---|---|
| First post | 2016-02-08 14:00 +0100 |
| Last post | 2016-02-08 18:00 +0100 |
| Articles | 5 — 2 participants |
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[PATCH 1/2] serial: 8250: fix building mediatek with SERIAL_8250=m Arnd Bergmann <arnd@arndb.de> - 2016-02-08 14:00 +0100
[PATCH 2/2] serial: 8250: fix building Ingenic with SERIAL_8250=m Arnd Bergmann <arnd@arndb.de> - 2016-02-08 14:00 +0100
Re: [PATCH 2/2] serial: 8250: fix building Ingenic with SERIAL_8250=m Paul Gortmaker <paul.gortmaker@windriver.com> - 2016-02-08 17:50 +0100
Re: [PATCH 2/2] serial: 8250: fix building Ingenic with SERIAL_8250=m Arnd Bergmann <arnd@arndb.de> - 2016-02-08 22:50 +0100
Re: [PATCH 1/2] serial: 8250: fix building mediatek with SERIAL_8250=m Paul Gortmaker <paul.gortmaker@windriver.com> - 2016-02-08 18:00 +0100
| From | Arnd Bergmann <arnd@arndb.de> |
|---|---|
| Date | 2016-02-08 14:00 +0100 |
| Subject | [PATCH 1/2] serial: 8250: fix building mediatek with SERIAL_8250=m |
| Message-ID | <qZTA5-5ma-5@gated-at.bofh.it> |
The Mediatek 8250 driver has a 'bool' Kconfig symbol, but that breaks when SERIAL_8250 is a loadable module: drivers/tty/built-in.o: In function `mtk8250_set_termios': 8250_ingenic.c:(.text+0x1bee8): undefined reference to `serial8250_do_set_termios' 8250_ingenic.c:(.text+0x1bf10): undefined reference to `uart_get_baud_rate' 8250_ingenic.c:(.text+0x1c09c): undefined reference to `uart_get_divisor' drivers/tty/built-in.o: In function `mtk8250_do_pm': 8250_ingenic.c:(.text+0x1c0d0): undefined reference to `serial8250_do_pm' drivers/tty/built-in.o: In function `mtk8250_probe': 8250_ingenic.c:(.text+0x1c2e4): undefined reference to `serial8250_register_8250_port' serial/8250/8250_mtk.c:287:242: error: data definition has no type or storage class [-Werror] serial/8250/8250_mtk.c:287:122: error: 'mtk8250_platform_driver_init' defined but not used [-Werror=unused-function] This changes the symbol to a 'tristate', so the dependency on SERIAL_8250 also works when that is set to 'm'. To actually build the driver, we also need to include <linux/module.h>. Note that the driver uses builtin_platform_driver() and implements no .remove() callback, so unloading the module is not possible. Signed-off-by: Arnd Bergmann <arnd@arndb.de> --- drivers/tty/serial/8250/8250_mtk.c | 1 + drivers/tty/serial/8250/Kconfig | 2 +- 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/tty/serial/8250/8250_mtk.c b/drivers/tty/serial/8250/8250_mtk.c index 9038843cadc7..7e9242a5ddfe 100644 --- a/drivers/tty/serial/8250/8250_mtk.c +++ b/drivers/tty/serial/8250/8250_mtk.c @@ -19,6 +19,7 @@ #include <linux/init.h> #include <linux/of_irq.h> #include <linux/of_platform.h> +#include <linux/module.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> #include <linux/serial_8250.h> diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig index 67ad6b0d595b..6ae0fae4f796 100644 --- a/drivers/tty/serial/8250/Kconfig +++ b/drivers/tty/serial/8250/Kconfig @@ -370,7 +370,7 @@ config SERIAL_8250_LPC18XX serial port, say Y to this option. If unsure, say Y. config SERIAL_8250_MT6577 - bool "Mediatek serial port support" + tristate "Mediatek serial port support" depends on SERIAL_8250 && ARCH_MEDIATEK help If you have a Mediatek based board and want to use the -- 2.7.0
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| From | Arnd Bergmann <arnd@arndb.de> |
|---|---|
| Date | 2016-02-08 14:00 +0100 |
| Subject | [PATCH 2/2] serial: 8250: fix building Ingenic with SERIAL_8250=m |
| Message-ID | <qZTA6-5ma-7@gated-at.bofh.it> |
| In reply to | #1329014 |
The Ingenic 8250 driver has a 'bool' Kconfig symbol, but that breaks when SERIAL_8250 is a loadable module: drivers/tty/built-in.o: In function `ingenic_uart_probe': 8250_ingenic.c:(.text+0x1c1a0): undefined reference to `serial8250_register_8250_port' This changes the symbol to a 'tristate', plus a dependency on SERIAL_8250, which makes it work again. Unlike the other soc-specific backends, this one has no dependency on an architecture or a platform. I'm adding a dependency on MIPS || COMPILE_TEST as well here, to avoid showing the driver on architectures that are not interested in it. Signed-off-by: Arnd Bergmann <arnd@arndb.de> --- drivers/tty/serial/8250/Kconfig | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig index 6ae0fae4f796..13c63b14179f 100644 --- a/drivers/tty/serial/8250/Kconfig +++ b/drivers/tty/serial/8250/Kconfig @@ -384,8 +384,8 @@ config SERIAL_8250_UNIPHIER serial ports, say Y to this option. If unsure, say N. config SERIAL_8250_INGENIC - bool "Support for Ingenic SoC serial ports" - depends on OF_FLATTREE + tristate "Support for Ingenic SoC serial ports" + depends on SERIAL_8250 && OF_FLATTREE && (MIPS || COMPILE_TEST) select LIBFDT help If you have a system using an Ingenic SoC and wish to make use of -- 2.7.0
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| From | Paul Gortmaker <paul.gortmaker@windriver.com> |
|---|---|
| Date | 2016-02-08 17:50 +0100 |
| Subject | Re: [PATCH 2/2] serial: 8250: fix building Ingenic with SERIAL_8250=m |
| Message-ID | <qZXaF-7Ql-15@gated-at.bofh.it> |
| In reply to | #1329016 |
[[PATCH 2/2] serial: 8250: fix building Ingenic with SERIAL_8250=m] On 08/02/2016 (Mon 13:51) Arnd Bergmann wrote: > The Ingenic 8250 driver has a 'bool' Kconfig symbol, but that > breaks when SERIAL_8250 is a loadable module: > > drivers/tty/built-in.o: In function `ingenic_uart_probe': > 8250_ingenic.c:(.text+0x1c1a0): undefined reference to `serial8250_register_8250_port' > > This changes the symbol to a 'tristate', plus a dependency on Note that Greg just queued a patch yesterday (but sent in 2015) that removed what was the dead modular code. It could also depend on SERIAL_8250=y to resolve the build issue you found, if nobody cares about having modular SOC console UART drivers. Either way, I don't have issue with it being tristate vs bool, but if you do go with tristate, then my patch will have to be dropped/reverted. Paul. -- > SERIAL_8250, which makes it work again. Unlike the other > soc-specific backends, this one has no dependency on an > architecture or a platform. I'm adding a dependency on > MIPS || COMPILE_TEST as well here, to avoid showing the driver > on architectures that are not interested in it. > > Signed-off-by: Arnd Bergmann <arnd@arndb.de> > --- > drivers/tty/serial/8250/Kconfig | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig > index 6ae0fae4f796..13c63b14179f 100644 > --- a/drivers/tty/serial/8250/Kconfig > +++ b/drivers/tty/serial/8250/Kconfig > @@ -384,8 +384,8 @@ config SERIAL_8250_UNIPHIER > serial ports, say Y to this option. If unsure, say N. > > config SERIAL_8250_INGENIC > - bool "Support for Ingenic SoC serial ports" > - depends on OF_FLATTREE > + tristate "Support for Ingenic SoC serial ports" > + depends on SERIAL_8250 && OF_FLATTREE && (MIPS || COMPILE_TEST) > select LIBFDT > help > If you have a system using an Ingenic SoC and wish to make use of > -- > 2.7.0 >
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| From | Arnd Bergmann <arnd@arndb.de> |
|---|---|
| Date | 2016-02-08 22:50 +0100 |
| Subject | Re: [PATCH 2/2] serial: 8250: fix building Ingenic with SERIAL_8250=m |
| Message-ID | <r01R0-2zw-17@gated-at.bofh.it> |
| In reply to | #1329302 |
On Monday 08 February 2016 11:45:44 Paul Gortmaker wrote: > [[PATCH 2/2] serial: 8250: fix building Ingenic with SERIAL_8250=m] On 08/02/2016 (Mon 13:51) Arnd Bergmann wrote: > > > The Ingenic 8250 driver has a 'bool' Kconfig symbol, but that > > breaks when SERIAL_8250 is a loadable module: > > > > drivers/tty/built-in.o: In function `ingenic_uart_probe': > > 8250_ingenic.c:(.text+0x1c1a0): undefined reference to `serial8250_register_8250_port' > > > > This changes the symbol to a 'tristate', plus a dependency on > > Note that Greg just queued a patch yesterday (but sent in 2015) that > removed what was the dead modular code. > > It could also depend on SERIAL_8250=y to resolve the build issue you > found, if nobody cares about having modular SOC console UART drivers. All other UART drivers can be modules, no need for this to be an exception I think. Having it depend on SERIAL_8250=y would make the driver disabled on 'allmodconfig', which is a bit counterproductive for the purpose of allmodconfig. I don't think anyone actually cares about the driver being runtime loaded on real hardware. > Either way, I don't have issue with it being tristate vs bool, but if > you do go with tristate, then my patch will have to be dropped/reverted. Fine with me too. I also now saw in the randconfig builds that the driver is missing an #include <linux/module.h>, which I guess is going to be there after reverting your patch. I'll send a new series. Arnd
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| From | Paul Gortmaker <paul.gortmaker@windriver.com> |
|---|---|
| Date | 2016-02-08 18:00 +0100 |
| Subject | Re: [PATCH 1/2] serial: 8250: fix building mediatek with SERIAL_8250=m |
| Message-ID | <qZXkn-7Uw-29@gated-at.bofh.it> |
| In reply to | #1329014 |
[[PATCH 1/2] serial: 8250: fix building mediatek with SERIAL_8250=m] On 08/02/2016 (Mon 13:51) Arnd Bergmann wrote: > The Mediatek 8250 driver has a 'bool' Kconfig symbol, but that > breaks when SERIAL_8250 is a loadable module: > > drivers/tty/built-in.o: In function `mtk8250_set_termios': > 8250_ingenic.c:(.text+0x1bee8): undefined reference to `serial8250_do_set_termios' > 8250_ingenic.c:(.text+0x1bf10): undefined reference to `uart_get_baud_rate' > 8250_ingenic.c:(.text+0x1c09c): undefined reference to `uart_get_divisor' > drivers/tty/built-in.o: In function `mtk8250_do_pm': > 8250_ingenic.c:(.text+0x1c0d0): undefined reference to `serial8250_do_pm' > drivers/tty/built-in.o: In function `mtk8250_probe': > 8250_ingenic.c:(.text+0x1c2e4): undefined reference to `serial8250_register_8250_port' > serial/8250/8250_mtk.c:287:242: error: data definition has no type or storage class [-Werror] > serial/8250/8250_mtk.c:287:122: error: 'mtk8250_platform_driver_init' defined but not used [-Werror=unused-function] Probably should drop the ingenic lines above ; assuming they are make -j N related and that mtk doesn't depend on or build ingenic. > > This changes the symbol to a 'tristate', so the dependency on > SERIAL_8250 also works when that is set to 'm'. > To actually build the driver, we also need to include <linux/module.h>. > > Note that the driver uses builtin_platform_driver() and implements > no .remove() callback, so unloading the module is not possible. But this is due to d72d391c126e0ffd3047c06c4bef4d795853d5d5. So again, I'm not sure what this achives vs. just making it depend on having SERIAL_8250=y as a trivial fix for the one build issue. If you really see a use case for tristate, then the above should be reverted before adding your conversion to tristate I think. Paul. -- > > Signed-off-by: Arnd Bergmann <arnd@arndb.de> > --- > drivers/tty/serial/8250/8250_mtk.c | 1 + > drivers/tty/serial/8250/Kconfig | 2 +- > 2 files changed, 2 insertions(+), 1 deletion(-) > > diff --git a/drivers/tty/serial/8250/8250_mtk.c b/drivers/tty/serial/8250/8250_mtk.c > index 9038843cadc7..7e9242a5ddfe 100644 > --- a/drivers/tty/serial/8250/8250_mtk.c > +++ b/drivers/tty/serial/8250/8250_mtk.c > @@ -19,6 +19,7 @@ > #include <linux/init.h> > #include <linux/of_irq.h> > #include <linux/of_platform.h> > +#include <linux/module.h> > #include <linux/platform_device.h> > #include <linux/pm_runtime.h> > #include <linux/serial_8250.h> > diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig > index 67ad6b0d595b..6ae0fae4f796 100644 > --- a/drivers/tty/serial/8250/Kconfig > +++ b/drivers/tty/serial/8250/Kconfig > @@ -370,7 +370,7 @@ config SERIAL_8250_LPC18XX > serial port, say Y to this option. If unsure, say Y. > > config SERIAL_8250_MT6577 > - bool "Mediatek serial port support" > + tristate "Mediatek serial port support" > depends on SERIAL_8250 && ARCH_MEDIATEK > help > If you have a Mediatek based board and want to use the > -- > 2.7.0 >
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