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From: Chen Gang <gang.chen.5i5j@gmail.com>
To: Lennox Wu <lennox.wu@gmail.com>
Cc: Vineet Gupta <Vineet.Gupta1@synopsys.com>,
	Arnd Bergmann <arnd@arndb.de>,
	"akpm@linux-foundation.org" <akpm@linux-foundation.org>,
	"rth@twiddle.net" <rth@twiddle.net>,
	"ink@jurassic.park.msu.ru" <ink@jurassic.park.msu.ru>,
	"mattst88@gmail.com" <mattst88@gmail.com>,
	Geert Uytterhoeven <geert@linux-m68k.org>,
	Jean Delvare <jdelvare@suse.de>,
	"linux@arm.linux.org.uk" <linux@arm.linux.org.uk>,
	"catalin.marinas@arm.com" <catalin.marinas@arm.com>,
	"will.deacon@arm.com" <will.deacon@arm.com>,
	"hskinnemoen@gmail.com" <hskinnemoen@gmail.com>,
	"egtvedt@samfundet.no" <egtvedt@samfundet.no>,
	"realmz6@gmail.com" <realmz6@gmail.com>,
	"msalter@redhat.com" <msalter@redhat.com>,
	"a-jacquiot@ti.com" <a-jacquiot@ti.com>,
	"starvik@axis.com" <starvik@axis.com>,
	jesper.n
Subject: Re: [PATCH v3] arch: Kconfig: Let all architectures set endian explicitly
Date: Fri, 15 Aug 2014 06:22:35 +0800	[thread overview]
Message-ID: <53ED36AB.8020703@gmail.com> (raw)
In-Reply-To: <CAF0htA6qfhyVXEuLbruiz+dfxnieF-309NdxSDhoEYHM=aBhQA@mail.gmail.com>

On 08/15/2014 02:27 AM, Lennox Wu wrote:
> I don't think it's necessary, what's the benfit?
> 
> 2014-08-15 2:21 GMT+08:00 Vineet Gupta <Vineet.Gupta1@synopsys.com>:
> 
>> On Thursday 14 August 2014 09:55 AM, Chen Gang wrote:
[...]
>>> diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
>>> index 9596b0a..e939abd 100644
>>> --- a/arch/arc/Kconfig
>>> +++ b/arch/arc/Kconfig
>>> @@ -35,6 +35,7 @@ config ARC
>>>       select OF_EARLY_FLATTREE
>>>       select PERF_USE_VMALLOC
>>>       select HAVE_DEBUG_STACKOVERFLOW
>>> +     select CPU_LITTLE_ENDIAN if !CPU_BIG_ENDIAN
>>
>> It is not clear what exactly are you trying to fix. What doesn't work w/o
>> this
>> patch !
>>

For many individual modules may need check CPU_LITTLE_ENDIAN or
CPU_BIG_ENDIAN, which is an architecture's attribute.

Or they have to list many architectures which they support, which they
don't support. And still, it is not precise.

For architecture API, endian is a main architecture's attribute which
may be used by outside, so every architecture need let outside know
about it, explicitly.


Thanks.
-- 
Chen Gang

Open share and attitude like air water and life which God blessed


WARNING: multiple messages have this Message-ID (diff)
From: Chen Gang <gang.chen.5i5j@gmail.com>
To: Lennox Wu <lennox.wu@gmail.com>
Cc: Vineet Gupta <Vineet.Gupta1@synopsys.com>,
	Arnd Bergmann <arnd@arndb.de>,
	"akpm@linux-foundation.org" <akpm@linux-foundation.org>,
	"rth@twiddle.net" <rth@twiddle.net>,
	"ink@jurassic.park.msu.ru" <ink@jurassic.park.msu.ru>,
	"mattst88@gmail.com" <mattst88@gmail.com>,
	Geert Uytterhoeven <geert@linux-m68k.org>,
	Jean Delvare <jdelvare@suse.de>,
	"linux@arm.linux.org.uk" <linux@arm.linux.org.uk>,
	"catalin.marinas@arm.com" <catalin.marinas@arm.com>,
	"will.deacon@arm.com" <will.deacon@arm.com>,
	"hskinnemoen@gmail.com" <hskinnemoen@gmail.com>,
	"egtvedt@samfundet.no" <egtvedt@samfundet.no>,
	"realmz6@gmail.com" <realmz6@gmail.com>,
	"msalter@redhat.com" <msalter@redhat.com>,
	"a-jacquiot@ti.com" <a-jacquiot@ti.com>,
	"starvik@axis.com" <starvik@axis.com>,
	"jesper.nilsson@axis.com" <jesper.nilsson@axis.com>,
	"dhowells@redhat.com" <dhowells@redhat.com>,
	"rkuo@codeaurora.org" <rkuo@codeaurora.org>,
	"tony.luck@intel.com" <tony.luck@intel.com>,
	"fenghua.yu@intel.com" <fenghua.yu@intel.com>,
	"takata@linux-m32r.org" <takata@linux-m32r.org>,
	"james.hogan@imgtec.com" <james.hogan@imgtec.com>,
	Michal Simek <monstr@monstr.eu>,
	"ralf@linux-mips.org" <ralf@linux-mips.org>,
	"yasutake.koichi@jp.panasonic.com"
	<yasutake.koichi@jp.panasonic.com>,
	"jonas@southpole.se" <jonas@southpole.se>,
	"jejb@parisc-linux.org" <jejb@parisc-linux.org>,
	"deller@gmx.de" <deller@gmx.de>,
	Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	"paulus@samba.org" <paulus@samba.org>,
	"mpe@ellerman.id.au" <mpe@ellerman.id.au>,
	Martin Schwidefsky <schwidefsky@de.ibm.com>,
	"heiko.carstens@de.ibm.com" <heiko.carstens@de.ibm.com>,
	Liqin Chen <liqin.linux@gmail.com>,
	"David S. Miller" <davem@davemloft.net>,
	"cmetcalf@tilera.com" <cmetcalf@tilera.com>,
	"jdike@addtoit.com" <jdike@addtoit.com>,
	Richard Weinberger <richard@nod.at>,
	"gxt@mprc.pku.edu.cn" <gxt@mprc.pku.edu.cn>,
	"tglx@linutronix.de" <tglx@linutronix.de>,
	"mingo@redhat.com" <mingo@redhat.com>,
	"hpa@zytor.com" <hpa@zytor.com>,
	"chris@zankel.net" <chris@zankel.net>,
	"jcmvbkbc@gmail.com" <jcmvbkbc@gmail.com>,
	"linux390@de.ibm.com" <linux390@de.ibm.com>,
	"x86@kernel.org" <x86@kernel.org>,
	"linux-alpha@vger.kernel.org" <linux-alpha@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>,
	"adi-buildroot-devel@lists.sourceforge.net" 
	<adi-buildroot-devel@lists.sourceforge.net>,
	"linux-c6x-dev@linux-c6x.org" <linux-c6x-dev@linux-c6x.org>,
	"linux-cris-kernel@axis.com" <linux-cris-kernel@axis.com>,
	"linux-hexagon@vger.kernel.org" <linux-hexagon@vger.kernel.org>,
	"linux-ia64@vger.kernel.org" <linux-ia64@vger.kernel.org>,
	"linux-m32r@ml.linux-m32r.org" <linux-m32r@ml.linux-m32r.org>,
	"linux-m32r-ja@ml.linux-m32r.org"
	<linux-m32r-ja@ml.linux-m32r.org>,
	"linux-m68k@lists.linux-m68k.org"
	<linux-m68k@lists.linux-m68k.org>,
	"linux-metag@vger.kernel.org" <linux-metag@vger.kernel.org>,
	"linux-mips@linux-mips.org" <linux-mips@linux-mips.org>,
	"linux-am33-list@redhat.com" <linux-am33-list@redhat.com>,
	"linux@lists.openrisc.net" <linux@lists.openrisc.net>,
	"linux-parisc@vger.kernel.org" <linux-parisc@vger.kernel.org>,
	"linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>,
	"linux-s390@vger.kernel.org" <linux-s390@vger.kernel.org>,
	"sparclinux@vger.kernel.org" <sparclinux@vger.kernel.org>,
	"user-mode-linux-devel@lists.sourceforge.net" 
	<user-mode-linux-devel@lists.sourceforge.net>,
	"user-mode-linux-user@lists.sourceforge.net" 
	<user-mode-linux-user@lists.sourceforge.net>,
	"linux-xtensa@linux-xtensa.org" <linux-xtensa@linux-xtensa.org>
Subject: Re: [PATCH v3] arch: Kconfig: Let all architectures set endian explicitly
Date: Fri, 15 Aug 2014 06:22:35 +0800	[thread overview]
Message-ID: <53ED36AB.8020703@gmail.com> (raw)
In-Reply-To: <CAF0htA6qfhyVXEuLbruiz+dfxnieF-309NdxSDhoEYHM=aBhQA@mail.gmail.com>

On 08/15/2014 02:27 AM, Lennox Wu wrote:
> I don't think it's necessary, what's the benfit?
> 
> 2014-08-15 2:21 GMT+08:00 Vineet Gupta <Vineet.Gupta1@synopsys.com>:
> 
>> On Thursday 14 August 2014 09:55 AM, Chen Gang wrote:
[...]
>>> diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
>>> index 9596b0a..e939abd 100644
>>> --- a/arch/arc/Kconfig
>>> +++ b/arch/arc/Kconfig
>>> @@ -35,6 +35,7 @@ config ARC
>>>       select OF_EARLY_FLATTREE
>>>       select PERF_USE_VMALLOC
>>>       select HAVE_DEBUG_STACKOVERFLOW
>>> +     select CPU_LITTLE_ENDIAN if !CPU_BIG_ENDIAN
>>
>> It is not clear what exactly are you trying to fix. What doesn't work w/o
>> this
>> patch !
>>

For many individual modules may need check CPU_LITTLE_ENDIAN or
CPU_BIG_ENDIAN, which is an architecture's attribute.

Or they have to list many architectures which they support, which they
don't support. And still, it is not precise.

For architecture API, endian is a main architecture's attribute which
may be used by outside, so every architecture need let outside know
about it, explicitly.


Thanks.
-- 
Chen Gang

Open share and attitude like air water and life which God blessed

WARNING: multiple messages have this Message-ID (diff)
From: Chen Gang <gang.chen.5i5j@gmail.com>
To: Lennox Wu <lennox.wu@gmail.com>
Cc: "linux-m32r-ja@ml.linux-m32r.org"
	<linux-m32r-ja@ml.linux-m32r.org>,
	"linux-mips@linux-mips.org" <linux-mips@linux-mips.org>,
	"a-jacquiot@ti.com" <a-jacquiot@ti.com>,
	"catalin.marinas@arm.com" <catalin.marinas@arm.com>,
	"linux@lists.openrisc.net" <linux@lists.openrisc.net>,
	"will.deacon@arm.com" <will.deacon@arm.com>,
	"dhowells@redhat.com" <dhowells@redhat.com>,
	"jcmvbkbc@gmail.com" <jcmvbkbc@gmail.com>,
	"paulus@samba.org" <paulus@samba.org>,
	"hpa@zytor.com" <hpa@zytor.com>,
	"sparclinux@vger.kernel.org" <sparclinux@vger.kernel.org>,
	"linux-hexagon@vger.kernel.org" <linux-hexagon@vger.kernel.org>,
	"gxt@mprc.pku.edu.cn" <gxt@mprc.pku.edu.cn>,
	Jean Delvare <jdelvare@suse.de>,
	"egtvedt@samfundet.no" <egtvedt@samfundet.no>,
	"jonas@southpole.se" <jonas@southpole.se>,
	Liqin Chen <liqin.linux@gmail.com>,
	"jesper.nilsson@axis.com" <jesper.nilsson@axis.com>,
	"linux-am33-list@redhat.com" <linux-am33-list@redhat.com>,
	"linux@arm.linux.org.uk" <linux@arm.linux.org.uk>,
	"linux-c6x-dev@linux-c6x.org" <linux-c6x-dev@linux-c6x.org>,
	"David S. Miller" <davem@davemloft.net>,
	"linux-xtensa@linux-xtensa.org" <linux-xtensa@linux-xtensa.org>,
	"takata@linux-m32r.org" <takata@linux-m32r.org>,
	"x86@kernel.org" <x86@kernel.org>,
	"jejb@parisc-linux.org" <jejb@parisc-linux.org>,
	"mingo@redhat.com" <mingo@redhat.com>,
	Geert Uytterhoeven <geert@linux-m68k.org>,
	"msalter@redhat.com" <msalter@redhat.com>,
	"mattst88@gmail.com" <mattst88@gmail.com>,
	"jdike@addtoit.com" <jdike@addtoit.com>,
	"hskinnemoen@gmail.com" <hskinnemoen@gmail.com>,
	"fenghua.yu@intel.com" <fenghua.yu@intel.com>,
	"james.hogan@imgtec.com" <james.hogan@imgtec.com>,
	Arnd Bergmann <arnd@arndb.de>,
	"realmz6@gmail.com" <realmz6@gmail.com>,
	"heiko.carstens@de.ibm.com" <heiko.carstens@de.ibm.com>,
	Vineet Gupta <Vineet.Gupta1@synopsys.com>,
	"linux-alpha@vger.kernel.org" <linux-alpha@vger.kernel.org>,
	"adi-buildroot-devel@lists.sourceforge.net"
	<adi-buildroot-devel@lists.sourceforge.net>,
	"cmetcalf@tilera.com" <cmetcalf@tilera.com>,
	"starvik@axis.com" <starvik@axis.com>,
	"linux-m68k@lists.linux-m68k.org"
	<linux-m68k@lists.linux-m68k.org>,
	"linux-m32r@ml.linux-m32r.org" <linux-m32r@ml.linux-m32r.org>,
	"ink@jurassic.park.msu.ru" <ink@jurassic.park.msu.ru>,
	"user-mode-linux-user@lists.sourceforge.net"
	<user-mode-linux-user@lists.sourceforge.net>,
	"tglx@linutronix.de" <tglx@linutronix.de>,
	"linux-metag@vger.kernel.org" <linux-metag@vger.kernel.org>,
	"linux-arm-kernel@lists.infradead.org"
	<linux-arm-kernel@lists.infradead.org>,
	"rth@twiddle.net" <rth@twiddle.net>,
	"chris@zankel.net" <chris@zankel.net>,
	Michal Simek <monstr@monstr.eu>,
	"tony.luck@intel.com" <tony.luck@intel.com>,
	"linux-ia64@vger.kernel.org" <linux-ia64@vger.kernel.org>,
	"linux-parisc@vger.kernel.org" <linux-parisc@vger.kernel.org>,
	"linux-cris-kernel@axis.com" <linux-cris-kernel@axis.com>,
	"linux-s390@vger.kernel.org" <linux-s390@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"ralf@linux-mips.org" <ralf@linux-mips.org>,
	"rkuo@codeaurora.org" <rkuo@codeaurora.org>,
	"user-mode-linux-devel@lists.sourceforge.net"
	<user-mode-linux-devel@lists.sourceforge.net>,
	Richard Weinberger <richard@nod.at>,
	Martin Schwidefsky <schwidefsky@de.ibm.com>,
	"linux390@de.ibm.com" <linux390@de.ibm.com>,
	"akpm@linux-foundation.org" <akpm@linux-foundation.org>,
	"yasutake.koichi@jp.panasonic.com"
	<yasutake.koichi@jp.panasonic.com>,
	"linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>,
	"deller@gmx.de" <deller@gmx.de>
Subject: Re: [PATCH v3] arch: Kconfig: Let all architectures set endian explicitly
Date: Fri, 15 Aug 2014 06:22:35 +0800	[thread overview]
Message-ID: <53ED36AB.8020703@gmail.com> (raw)
In-Reply-To: <CAF0htA6qfhyVXEuLbruiz+dfxnieF-309NdxSDhoEYHM=aBhQA@mail.gmail.com>

On 08/15/2014 02:27 AM, Lennox Wu wrote:
> I don't think it's necessary, what's the benfit?
> 
> 2014-08-15 2:21 GMT+08:00 Vineet Gupta <Vineet.Gupta1@synopsys.com>:
> 
>> On Thursday 14 August 2014 09:55 AM, Chen Gang wrote:
[...]
>>> diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
>>> index 9596b0a..e939abd 100644
>>> --- a/arch/arc/Kconfig
>>> +++ b/arch/arc/Kconfig
>>> @@ -35,6 +35,7 @@ config ARC
>>>       select OF_EARLY_FLATTREE
>>>       select PERF_USE_VMALLOC
>>>       select HAVE_DEBUG_STACKOVERFLOW
>>> +     select CPU_LITTLE_ENDIAN if !CPU_BIG_ENDIAN
>>
>> It is not clear what exactly are you trying to fix. What doesn't work w/o
>> this
>> patch !
>>

For many individual modules may need check CPU_LITTLE_ENDIAN or
CPU_BIG_ENDIAN, which is an architecture's attribute.

Or they have to list many architectures which they support, which they
don't support. And still, it is not precise.

For architecture API, endian is a main architecture's attribute which
may be used by outside, so every architecture need let outside know
about it, explicitly.


Thanks.
-- 
Chen Gang

Open share and attitude like air water and life which God blessed

  reply	other threads:[~2014-08-14 22:22 UTC|newest]

Thread overview: 51+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-08-14 16:54 [PATCH v3] arch: Kconfig: Let all architectures set endian explicitly Chen Gang
2014-08-14 16:54 ` Chen Gang
2014-08-14 16:54 ` Chen Gang
2014-08-14 18:04 ` Ralf Baechle
2014-08-14 18:04   ` Ralf Baechle
2014-08-14 18:04   ` Ralf Baechle
2014-08-14 22:14   ` Chen Gang
2014-08-14 22:14     ` Chen Gang
2014-08-14 22:14     ` Chen Gang
2014-08-15  9:01     ` Chen Gang
2014-08-15  9:01       ` Chen Gang
2014-08-15  9:01       ` Chen Gang
2014-08-24  8:38       ` Chen Gang
2014-08-24  8:38         ` Chen Gang
2014-08-24  8:38         ` Chen Gang
2014-08-24  8:38         ` Chen Gang
2014-08-24  8:38         ` Chen Gang
2014-08-25 12:26         ` Chen Gang
2014-08-25 12:26           ` Chen Gang
2014-08-25 12:26           ` Chen Gang
2014-08-25 12:26           ` Chen Gang
2014-08-14 18:21 ` Vineet Gupta
2014-08-14 18:21   ` Vineet Gupta
2014-08-14 18:21   ` Vineet Gupta
2014-08-14 18:21   ` Vineet Gupta
2014-08-14 18:21   ` Vineet Gupta
2014-08-14 18:27   ` Lennox Wu
2014-08-14 18:27     ` Lennox Wu
2014-08-14 18:27     ` Lennox Wu
2014-08-14 22:22     ` Chen Gang [this message]
2014-08-14 22:22       ` Chen Gang
2014-08-14 22:22       ` Chen Gang
2014-08-14 23:12       ` Vineet Gupta
2014-08-14 23:12         ` Vineet Gupta
2014-08-14 23:12         ` Vineet Gupta
2014-08-14 23:12         ` Vineet Gupta
2014-08-14 23:12         ` Vineet Gupta
2014-08-15  1:29         ` Chen Gang
2014-08-15  1:29           ` Chen Gang
2014-08-15  1:29           ` Chen Gang
2014-08-15  1:29           ` Chen Gang
2014-08-15  1:47 ` Max Filippov
2014-08-15  1:47   ` Max Filippov
2014-08-15  1:47   ` Max Filippov
2014-08-15  1:52   ` Max Filippov
2014-08-15  1:52     ` Max Filippov
2014-08-15  1:52     ` Max Filippov
2014-08-15  2:06     ` Chen Gang
2014-08-15  2:06       ` Chen Gang
2014-08-15  2:06       ` Chen Gang
2014-08-15  2:06       ` Chen Gang

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