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

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Message-ID: <526F763B.6020806@asianux.com>
Date:	Tue, 29 Oct 2013 16:47:55 +0800
From:	Chen Gang <gang.chen@...anux.com>
To:	Max Filippov <jcmvbkbc@...il.com>
CC:	"vgupta@...opsys.com" <vgupta@...opsys.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>
Subject: Re: [PATCH] arch: use ASM_NL instead of ';' for assembler new line
 character in the macro

On 10/29/2013 04:34 PM, Max Filippov wrote:
> On Tue, Oct 29, 2013 at 11:57 AM, Chen Gang <gang.chen@...anux.com> wrote:
>> On 10/28/2013 07:18 PM, Max Filippov wrote:
>>> Hi Chen,
>>>
>>> On Mon, Oct 28, 2013 at 2:30 PM, Chen Gang <gang.chen@...anux.com> 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 +++++++++++++++++++------------------
>>> Actually vmlinux.lds.h is not an assembly code, but rather a linker script,
>>> later preprocessed by cpp.
>>>
>>
>> Consult: do xtensa also has its own ASM_NL?
> 
> It works well with common semicolon.
> 

Thank you for your confirmation.


After scan the "arch/" sub-directory, except arc, the cris, c6x, frv,
and parisc are also use ';' as comments, I guess they will welcome this
patch.

And some of another architectures may use '#', '|', '!', '@' or "//" as
line comment mark. It seems most of them support ';' as newline in the
macro, but it is also necessary to give a check.

If this patch is applied, I will/should sync all the related
architectures to let ASM_NL consistency.

:-)

Thanks.
-- 
Chen Gang
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