linux-kernel - Re: [PATCH v2] mips: BCM63XX: ensure that CPU_SUPPORTS_32BIT

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Date:   Sat, 6 Nov 2021 12:34:11 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Randy Dunlap <rdunlap@...radead.org>, linux-kernel@...r.kernel.org
Cc:     kernel test robot <lkp@...el.com>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        bcm-kernel-feedback-list@...adcom.com, linux-mips@...r.kernel.org,
        Paul Burton <paulburton@...nel.org>,
        Maxime Bizon <mbizon@...ebox.fr>,
        Ralf Baechle <ralf@...ux-mips.org>
Subject: Re: [PATCH v2] mips: BCM63XX: ensure that CPU_SUPPORTS_32BIT_KERNEL
 is set

Le 06/11/2021 à 08:49, Randy Dunlap a écrit :
> Several header files need info on CONFIG_32BIT or CONFIG_64BIT,
> but kconfig symbol BCM63XX does not provide that info. This leads
> to many build errors, e.g.:
> 
>    arch/mips/include/asm/page.h:196:13: error: use of undeclared identifier 'CAC_BASE'
>            return x - PAGE_OFFSET + PHYS_OFFSET;
>    arch/mips/include/asm/mach-generic/spaces.h:91:23: note: expanded from macro 'PAGE_OFFSET'
>    #define PAGE_OFFSET             (CAC_BASE + PHYS_OFFSET)
>    arch/mips/include/asm/io.h:134:28: error: use of undeclared identifier 'CAC_BASE'
>            return (void *)(address + PAGE_OFFSET - PHYS_OFFSET);
>    arch/mips/include/asm/mach-generic/spaces.h:91:23: note: expanded from macro 'PAGE_OFFSET'
>    #define PAGE_OFFSET             (CAC_BASE + PHYS_OFFSET)
> 
> arch/mips/include/asm/uaccess.h:82:10: error: use of undeclared identifier '__UA_LIMIT'
>            return (__UA_LIMIT & (addr | (addr + size) | __ua_size(size))) == 0;
> 
> 
> Selecting the SYS_HAS_CPU_BMIPS* symbols causes SYS_HAS_CPU_BMIPS to be
> set, which then selects CPU_SUPPORT_32BIT_KERNEL, which causes
> CONFIG_32BIT to be set. (a bit more indirect than v1 [RFC].)
> 
> Fixes: e7300d04bd08 ("MIPS: BCM63xx: Add support for the Broadcom BCM63xx family of SOCs.")
> Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
> Reported-by: kernel test robot <lkp@...el.com>
> Cc: Thomas Bogendoerfer <tsbogend@...ha.franken.de>
> Cc: Florian Fainelli <f.fainelli@...il.com>
> Cc: bcm-kernel-feedback-list@...adcom.com
> Cc: linux-mips@...r.kernel.org
> Cc: Paul Burton <paulburton@...nel.org>
> Cc: Maxime Bizon <mbizon@...ebox.fr>
> Cc: Ralf Baechle <ralf@...ux-mips.org>
> Suggested-by: Florian Fainelli <f.fainelli@...il.com>

Acked-by: Florian Fainelli <f.fainelli@...il.com>

Thanks Randy!
-- 
Florian