linux-kernel - Re: [PATCH] arch: use ASM_NL instead of ';' for assembler new line character in the macro

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Date:	Tue, 29 Oct 2013 09:39:12 +0800
From:	Chen Gang <gang.chen@...anux.com>
To:	Chen Gang <gang.chen@...anux.com>
CC:	Vineet Gupta <vineetg76@...il.com>,
	James Hogan <james.hogan@...tec.com>,
	Al Viro <viro@...iv.linux.org.uk>,
	Arnd Bergmann <arnd@...db.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Linux-Arch <linux-arch@...r.kernel.org>,
	Max Filippov <jcmvbkbc@...il.com>
Subject: Re: [PATCH] arch: use ASM_NL instead of ';' for assembler new line
 character in the macro

On 10/29/2013 09:04 AM, Chen Gang wrote:
> On 10/28/2013 09:45 PM, Vineet Gupta wrote:
>> On 10/28/2013 04:00 PM, Chen Gang wrote:
>>> For some toolchains, they use another character as newline in a macro
>>> (e.g. arc uses '`'), so for generic assembly code, need use ASM_NL (a
>>> macro) instead of ';' for it.
>>>
>>> Since "linux/export.h" are mainly used for exporting work, then our fix
>>> more likely belongs to "linux/linkage.h", and we need add the related
>>> checking in "linkage.h".
>>>
>>> Also need notice 80 columns wrap, and '\t' for each line.
>>>
>>>
>>> Signed-off-by: Chen Gang <gang.chen@...anux.com>
>>> ---
>>>  arch/arc/include/asm/linkage.h    |    2 +
>>>  include/asm-generic/vmlinux.lds.h |  350 +++++++++++++++++++------------------
>>>  include/linux/linkage.h           |   19 +
>>
>> Like Max said, please drop the linker script bits - they are OK - otherwise ARC
>> kernel won't have been building at all.
>>
> 
> OK, thank you and Max, I will send patch v2 for it.
> 
> Hmm... after this modification, it passed allmodconfig for x86_64. And
> for arc, at least, it can build to "mm/" sub-directory (after here, I
> stopped compiling).

It seems I should not stopped when build to "mm/" sub-directory -- that
will let myself find: "ld and as are really 'individual' enough,
although both of them belong binutils".  :-)


> 
> 
>> And you also need to fix kernel/modsign_certificate.S as part of same patchset as
>> that is where the problem started in first place.
>>
> 
> Hmm... can that be another patch?
> 
> For "kernel/modsign_certificate.S", I recommend to expand the macro
> which will shrink code line, either need not include additional header
> file, I feel that will be simpler for both code reader and writers.
> 
> 
> Thanks.
> 


-- 
Chen Gang
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