linux-kernel - Re: [PATCH 1/2] arch: consolidate CONFIG_STRICT

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Message-ID: <CAPcyv4g4NGQHteO=E4k3pRcKC=ByhFNqFh=0mixrsXKq+oMuMQ@mail.gmail.com>
Date:	Mon, 23 Nov 2015 09:09:58 -0800
From:	Dan Williams <dan.j.williams@...el.com>
To:	Heiko Carstens <heiko.carstens@...ibm.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-arch@...r.kernel.org, Russell King <linux@....linux.org.uk>,
	Kees Cook <keescook@...omium.org>,
	Arnd Bergmann <arnd@...db.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Catalin Marinas <catalin.marinas@....com>,
	"linux-nvdimm@...ts.01.org" <linux-nvdimm@...ts.01.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Will Deacon <will.deacon@....com>,
	Ingo Molnar <mingo@...hat.com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"David S. Miller" <davem@...emloft.net>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 1/2] arch: consolidate CONFIG_STRICT_DEVM in lib/Kconfig.debug

On Mon, Nov 23, 2015 at 1:53 AM, Heiko Carstens
<heiko.carstens@...ibm.com> wrote:
> On Sat, Nov 21, 2015 at 07:57:02PM -0800, Dan Williams wrote:
>> Let all the archs that implement CONFIG_STRICT_DEVM use a common
>> definition in lib/Kconfig.debug.
>>
>> Note, the 'depends on !SPARC' is due to sparc not implementing
>> devmem_is_allowed().
>>
>> Cc: Kees Cook <keescook@...omium.org>
>> Cc: Russell King <linux@....linux.org.uk>
>> Cc: Catalin Marinas <catalin.marinas@....com>
>> Cc: Will Deacon <will.deacon@....com>
>> Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
>> Cc: Martin Schwidefsky <schwidefsky@...ibm.com>
>> Cc: Heiko Carstens <heiko.carstens@...ibm.com>
>> Cc: Thomas Gleixner <tglx@...utronix.de>
>> Cc: Ingo Molnar <mingo@...hat.com>
>> Cc: "H. Peter Anvin" <hpa@...or.com>
>> Cc: Andrew Morton <akpm@...ux-foundation.org>
>> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
>> Cc: "David S. Miller" <davem@...emloft.net>
>> Suggested-by: Arnd Bergmann <arnd@...db.de>
>> Signed-off-by: Dan Williams <dan.j.williams@...el.com>
>> ---
>>  arch/arm/Kconfig.debug       |   14 --------------
>>  arch/arm64/Kconfig.debug     |   14 --------------
>>  arch/powerpc/Kconfig.debug   |   12 ------------
>>  arch/s390/Kconfig.debug      |   12 ------------
>>  arch/tile/Kconfig            |    3 ---
>>  arch/unicore32/Kconfig.debug |   14 --------------
>>  arch/x86/Kconfig.debug       |   17 -----------------
>>  lib/Kconfig.debug            |   19 +++++++++++++++++++
>>  8 files changed, 19 insertions(+), 86 deletions(-)
>
> For s390
>
> Acked-by: Heiko Carstens <heiko.carstens@...ibm.com>
>
>> diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
>> index 8c15b29d5adc..ad85145d0047 100644
>> --- a/lib/Kconfig.debug
>> +++ b/lib/Kconfig.debug
>> @@ -1853,3 +1853,22 @@ source "samples/Kconfig"
>>
>>  source "lib/Kconfig.kgdb"
>>
>> +config STRICT_DEVMEM
>> +     bool "Filter access to /dev/mem"
>> +     depends on MMU
>> +     depends on !SPARC
>> +     default y if TILE || PPC || S390
>
> I wouldn't mind if you would remove s390 from this list.
>

Will do. Thanks.
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