linux-kernel - Re: [PATCH v3 20/25] ARM: owl: Implement CPU enable-method for S500

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Date:   Wed, 1 Mar 2017 11:40:35 +0100
From:   Andreas Färber <afaerber@...e.de>
To:     linux-arm-kernel@...ts.infradead.org
Cc:     kbuild test robot <lkp@...el.com>, kbuild-all@...org,
        arm@...nel.org, mp-cs@...ions-semi.com, 96boards@...obotics.com,
        support@...aker.org, linux-kernel@...r.kernel.org,
        Russell King <linux@...linux.org.uk>
Subject: Re: [PATCH v3 20/25] ARM: owl: Implement CPU enable-method for S500

Am 01.03.2017 um 08:19 schrieb kbuild test robot:
> Hi Andreas,
> 
> [auto build test ERROR on next-20170228]
> [also build test ERROR on v4.10]
> [cannot apply to robh/for-next linus/master linux/master v4.9-rc8 v4.9-rc7 v4.9-rc6]
> [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
> 
> url:    https://github.com/0day-ci/linux/commits/Andreas-F-rber/ARM-Initial-Actions-Semi-S500-and-S900-enablement/20170301-110028
> config: arm-allmodconfig (attached as .config)
> compiler: arm-linux-gnueabi-gcc (Debian 6.1.1-9) 6.1.1 20160705
> reproduce:
>         wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # save the attached .config to linux build tree
>         make.cross ARCH=arm 
> 
> All errors (new ones prefixed by >>):
> 
>    arch/arm/mach-actions/headsmp.S: Assembler messages:
>>> arch/arm/mach-actions/headsmp.S:43: Error: selected processor does not support `dsb' in ARM mode
>>> arch/arm/mach-actions/headsmp.S:44: Error: selected processor does not support `isb' in ARM mode
> 
> vim +43 arch/arm/mach-actions/headsmp.S
> 
>     37		mov	r6, r2, lsl r0
>     38		orr	r5, r5, r6	@ Reg = (Temp<<WayShift)|(NumSets<<SetShift)
>     39		mcr	p15, 0, r5, c7, c6, 2
>     40		bgt	2b
>     41		cmp	r2, #0
>     42		bgt	1b
>   > 43		dsb
>   > 44		isb

Any suggestion what to do about this error? Obviously it built fine for
me, and the only thing I spotted in the attached config was that it's
apparently a BE8 build...

Do we need a Kconfig "depends on" or some #ifdef here? This assembler
part of the code was merely indentation-fixed by me.

Regards,
Andreas

>     45		mov	pc, lr
>     46	ENDPROC(owl_v7_invalidate_l1)
>     47	
> 
> ---
> 0-DAY kernel test infrastructure                Open Source Technology Center
> https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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