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Message-ID: <20230516185400.urjy6y3kh4grbagt@pali>
Date:   Tue, 16 May 2023 20:54:00 +0200
From:   Pali Rohár <pali@...nel.org>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     linux-kernel@...r.kernel.org,
        Kumar Gala <galak@...nel.crashing.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Nicholas Piggin <npiggin@...il.com>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH] powerpc: allow PPC_EARLY_DEBUG_CPM only when SERIAL_CPM=y

On Tuesday 16 May 2023 08:28:54 Randy Dunlap wrote:
> In a randconfig with CONFIG_SERIAL_CPM=m and
> CONFIG_PPC_EARLY_DEBUG_CPM=y, there is a build error:
> ERROR: modpost: "udbg_putc" [drivers/tty/serial/cpm_uart/cpm_uart.ko] undefined!
> 
> Prevent the build error by allowing PPC_EARLY_DEBUG_CPM only when
> SERIAL_CPM=y.
> 
> Fixes: c374e00e17f1 ("[POWERPC] Add early debug console for CPM serial ports.")
> Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
> Cc: Scott Wood <scottwood@...escale.com>
> Cc: Kumar Gala <galak@...nel.crashing.org>
> Cc: "Pali Rohár" <pali@...nel.org>
> Cc: Michael Ellerman <mpe@...erman.id.au>
> Cc: Nicholas Piggin <npiggin@...il.com>
> Cc: Christophe Leroy <christophe.leroy@...roup.eu>
> Cc: linuxppc-dev@...ts.ozlabs.org

Looks good,

Reviewed-by: Pali Rohár <pali@...nel.org>

> ---
>  arch/powerpc/Kconfig.debug |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff -- a/arch/powerpc/Kconfig.debug b/arch/powerpc/Kconfig.debug
> --- a/arch/powerpc/Kconfig.debug
> +++ b/arch/powerpc/Kconfig.debug
> @@ -240,7 +240,7 @@ config PPC_EARLY_DEBUG_40x
>  
>  config PPC_EARLY_DEBUG_CPM
>  	bool "Early serial debugging for Freescale CPM-based serial ports"
> -	depends on SERIAL_CPM
> +	depends on SERIAL_CPM=y
>  	help
>  	  Select this to enable early debugging for Freescale chips
>  	  using a CPM-based serial port.  This assumes that the bootwrapper

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