linux-kernel - Re: [PATCH] parport_pc: don't allow driver for SPARC32

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Date:   Thu, 6 Apr 2023 21:28:19 +0200
From:   Sam Ravnborg <sam@...nborg.org>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     linux-kernel@...r.kernel.org,
        Sudip Mukherjee <sudipm.mukherjee@...il.com>,
        "Maciej W . Rozycki" <macro@...am.me.uk>,
        "David S. Miller" <davem@...emloft.net>,
        sparclinux@...r.kernel.org, linux-parport@...ts.infradead.org
Subject: Re: [PATCH] parport_pc: don't allow driver for SPARC32

On Thu, Apr 06, 2023 at 09:05:48AM -0700, Randy Dunlap wrote:
> arch/sparc/kernel/ebus.o is only built for SPARC64.
> ns87303_lock is only built for SPARC64.
> arch/sparc/include/asm/parport.h says that it is for sparc64.
> Various documentation on the internet says that ebus is for UltraSPARC
> systems (64-bit).
> 
> Therefore don't allow PARPORT_PC to be built for SPARC32.
> 
> Fixes these build errors on SPARC32:
> 
> ERROR: modpost: "ebus_dma_irq_enable" [drivers/parport/parport_pc.ko] undefined!
> ERROR: modpost: "ebus_dma_unregister" [drivers/parport/parport_pc.ko] undefined!
> ERROR: modpost: "ebus_dma_register" [drivers/parport/parport_pc.ko] undefined!
> ERROR: modpost: "ns87303_lock" [drivers/parport/parport_pc.ko] undefined!
> ERROR: modpost: "ebus_dma_enable" [drivers/parport/parport_pc.ko] undefined!
> ERROR: modpost: "ebus_dma_prepare" [drivers/parport/parport_pc.ko] undefined!
> ERROR: modpost: "ebus_dma_request" [drivers/parport/parport_pc.ko] undefined!
> ERROR: modpost: "ebus_dma_residue" [drivers/parport/parport_pc.ko] undefined!
> 
> Fixes: 66bcd06099bb ("parport_pc: Also enable driver for PCI systems")
> Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
> Cc: Sudip Mukherjee <sudipm.mukherjee@...il.com>
> Cc: Maciej W. Rozycki <macro@...am.me.uk>
> Cc: "David S. Miller" <davem@...emloft.net>
> Cc: sparclinux@...r.kernel.org
> Cc: Sam Ravnborg <sam@...nborg.org>
> Cc: linux-parport@...ts.infradead.org
Acked-by: Sam Ravnborg <sam@...nborg.org>
> ---
>  drivers/parport/Kconfig |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff -- a/drivers/parport/Kconfig b/drivers/parport/Kconfig
> --- a/drivers/parport/Kconfig
> +++ b/drivers/parport/Kconfig
> @@ -42,7 +42,7 @@ if PARPORT
>  
>  config PARPORT_PC
>  	tristate "PC-style hardware"
> -	depends on ARCH_MIGHT_HAVE_PC_PARPORT || (PCI && !S390)
> +	depends on ARCH_MIGHT_HAVE_PC_PARPORT || (PCI && !S390 && !SPARC32)
>  	help
>  	  You should say Y here if you have a PC-style parallel port. All
>  	  IBM PC compatible computers and some Alphas have PC-style