linux-kernel - Re: [PATCH v2] macintosh/via-pmu: Fix build failure when CONFIG

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Message-ID: <aac54b56-3f23-a210-822c-204f590fb94a@csgroup.eu>
Date:   Thu, 7 Apr 2022 10:16:44 +0000
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Finn Thain <fthain@...ux-m68k.org>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>
CC:     Randy Dunlap <rdunlap@...radead.org>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] macintosh/via-pmu: Fix build failure when CONFIG_INPUT
 is disabled



Le 07/04/2022 à 12:11, Finn Thain a écrit :
> drivers/macintosh/via-pmu-event.o: In function `via_pmu_event':
> via-pmu-event.c:(.text+0x44): undefined reference to `input_event'
> via-pmu-event.c:(.text+0x68): undefined reference to `input_event'
> via-pmu-event.c:(.text+0x94): undefined reference to `input_event'
> via-pmu-event.c:(.text+0xb8): undefined reference to `input_event'
> drivers/macintosh/via-pmu-event.o: In function `via_pmu_event_init':
> via-pmu-event.c:(.init.text+0x20): undefined reference to `input_allocate_device'
> via-pmu-event.c:(.init.text+0xc4): undefined reference to `input_register_device'
> via-pmu-event.c:(.init.text+0xd4): undefined reference to `input_free_device'
> make[1]: *** [Makefile:1155: vmlinux] Error 1
> make: *** [Makefile:350: __build_one_by_one] Error 2
> 
> Don't call into the input subsystem unless CONFIG_INPUT is built-in.
> 
> Cc: Christophe Leroy <christophe.leroy@...roup.eu>
> Cc: Randy Dunlap <rdunlap@...radead.org>
> Cc: Geert Uytterhoeven <geert@...ux-m68k.org>
> Reported-by: kernel test robot <lkp@...el.com>
> Signed-off-by: Finn Thain <fthain@...ux-m68k.org>

Reviewed-by: Christophe Leroy <christophe.leroy@...roup.eu>

> ---
> Changed since v1:
>   - Adopted IS_ENABLED to avoid an ifdef as suggested by Christophe.
>   - Added the ADB_PMU_EVENT symbol as suggested by Geert, though this
>     adds a new Kconfig symbol for little gain AFAICS.
> ---
>   drivers/macintosh/Kconfig   | 4 ++++
>   drivers/macintosh/Makefile  | 3 ++-
>   drivers/macintosh/via-pmu.c | 2 +-
>   3 files changed, 7 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/macintosh/Kconfig b/drivers/macintosh/Kconfig
> index 5cdc361da37c..3942db15a2b8 100644
> --- a/drivers/macintosh/Kconfig
> +++ b/drivers/macintosh/Kconfig
> @@ -67,6 +67,10 @@ config ADB_PMU
>   	  this device; you should do so if your machine is one of those
>   	  mentioned above.
>   
> +config ADB_PMU_EVENT
> +	def_bool y
> +	depends on ADB_PMU && INPUT=y
> +
>   config ADB_PMU_LED
>   	bool "Support for the Power/iBook front LED"
>   	depends on PPC_PMAC && ADB_PMU
> diff --git a/drivers/macintosh/Makefile b/drivers/macintosh/Makefile
> index 49819b1b6f20..712edcb3e0b0 100644
> --- a/drivers/macintosh/Makefile
> +++ b/drivers/macintosh/Makefile
> @@ -12,7 +12,8 @@ obj-$(CONFIG_MAC_EMUMOUSEBTN)	+= mac_hid.o
>   obj-$(CONFIG_INPUT_ADBHID)	+= adbhid.o
>   obj-$(CONFIG_ANSLCD)		+= ans-lcd.o
>   
> -obj-$(CONFIG_ADB_PMU)		+= via-pmu.o via-pmu-event.o
> +obj-$(CONFIG_ADB_PMU)		+= via-pmu.o
> +obj-$(CONFIG_ADB_PMU_EVENT)	+= via-pmu-event.o
>   obj-$(CONFIG_ADB_PMU_LED)	+= via-pmu-led.o
>   obj-$(CONFIG_PMAC_BACKLIGHT)	+= via-pmu-backlight.o
>   obj-$(CONFIG_ADB_CUDA)		+= via-cuda.o
> diff --git a/drivers/macintosh/via-pmu.c b/drivers/macintosh/via-pmu.c
> index 399074306a74..495fd35b11de 100644
> --- a/drivers/macintosh/via-pmu.c
> +++ b/drivers/macintosh/via-pmu.c
> @@ -1463,7 +1463,7 @@ pmu_handle_data(unsigned char *data, int len)
>   		pmu_pass_intr(data, len);
>   		/* len == 6 is probably a bad check. But how do I
>   		 * know what PMU versions send what events here? */
> -		if (len == 6) {
> +		if (IS_ENABLED(CONFIG_ADB_PMU_EVENT) && len == 6) {
>   			via_pmu_event(PMU_EVT_POWER, !!(data[1]&8));
>   			via_pmu_event(PMU_EVT_LID, data[1]&1);
>   		}