linux-kernel - Re: [PATCH v2] arch/x86/tools/gen-insn-attr-x86.awk: remove duplicate const

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Date:	Sun, 09 Dec 2012 14:24:55 +0900
From:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
To:	Cong Ding <dinggnu@...il.com>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, x86@...nel.org,
	linux-kernel@...r.kernel.org,
	"yrl.pp-manager.tt@...achi.com" <yrl.pp-manager.tt@...achi.com>
Subject: Re: [PATCH v2] arch/x86/tools/gen-insn-attr-x86.awk: remove duplicate
 const

(2012/12/08 8:17), Cong Ding wrote:
>>>>>> Patch description please?
>>>>> there are 2 consts in the definition of one variable
>>>>>
>>>>
>>>> Please put in an actual patch description.  The first line (subject
>>>> line) is a title; the patch should make sense without it.
>>> sorry for that. so like this is fine?
>>>
>>
>> Well, except that typically you should explain which variable it is.
>> Yes, it is obvious if you look at the patch, but you're making the
>> reader spend a few more moments than necessary.
>>
>> Also, you should explain what the harm is -- if it breaks anything
>> or is just a cosmetic issue.
> sorry again for lacking of experience...
> and I missed another same error, so send version 2.

Ah, sorry for my mistake. I would like to make both the value
pointed by the pointers and the pointers itself read-only.
Thus the right way of the patch should be;

-	print "const insn_attr_t const *inat_escape_tables[INAT_ESC_MAX + 1]" \
+	print "const insn_attr_t * const inat_escape_tables[INAT_ESC_MAX + 1]" \

Cong, could you update your patch? then I can Ack that.

Thank you,

> 
> - cong
> ---
> From 6cf729b913287a6fc06325ca75ccf0efff9274e8 Mon Sep 17 00:00:00 2001
> From: Cong Ding <dinggnu@...il.com>
> Date: Fri, 7 Dec 2012 23:14:32 +0000
> Subject: [PATCH] arch/x86/tools/gen-insn-attr-x86.awk: remove duplicate const
> 
> fix the following sparse warning:
> arch/x86/lib/inat-tables.c:1080:25: warning: duplicate const
> arch/x86/lib/inat-tables.c:1095:25: warning: duplicate const
> arch/x86/lib/inat-tables.c:1118:25: warning: duplicate const
> 
> for variable inat_escape_tables, inat_group_tables, and inat_avx_tables
> 
> Signed-off-by: Cong Ding <dinggnu@...il.com>
> ---
>  arch/x86/tools/gen-insn-attr-x86.awk |    6 +++---
>  1 files changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/arch/x86/tools/gen-insn-attr-x86.awk b/arch/x86/tools/gen-insn-attr-x86.awk
> index ddcf39b..987c7b2 100644
> --- a/arch/x86/tools/gen-insn-attr-x86.awk
> +++ b/arch/x86/tools/gen-insn-attr-x86.awk
> @@ -356,7 +356,7 @@ END {
>  		exit 1
>  	# print escape opcode map's array
>  	print "/* Escape opcode map array */"
> -	print "const insn_attr_t const *inat_escape_tables[INAT_ESC_MAX + 1]" \
> +	print "const insn_attr_t *inat_escape_tables[INAT_ESC_MAX + 1]" \
>  	      "[INAT_LSTPFX_MAX + 1] = {"
>  	for (i = 0; i < geid; i++)
>  		for (j = 0; j < max_lprefix; j++)
> @@ -365,7 +365,7 @@ END {
>  	print "};\n"
>  	# print group opcode map's array
>  	print "/* Group opcode map array */"
> -	print "const insn_attr_t const *inat_group_tables[INAT_GRP_MAX + 1]"\
> +	print "const insn_attr_t *inat_group_tables[INAT_GRP_MAX + 1]"\
>  	      "[INAT_LSTPFX_MAX + 1] = {"
>  	for (i = 0; i < ggid; i++)
>  		for (j = 0; j < max_lprefix; j++)
> @@ -374,7 +374,7 @@ END {
>  	print "};\n"
>  	# print AVX opcode map's array
>  	print "/* AVX opcode map array */"
> -	print "const insn_attr_t const *inat_avx_tables[X86_VEX_M_MAX + 1]"\
> +	print "const insn_attr_t *inat_avx_tables[X86_VEX_M_MAX + 1]"\
>  	      "[INAT_LSTPFX_MAX + 1] = {"
>  	for (i = 0; i < gaid; i++)
>  		for (j = 0; j < max_lprefix; j++)
> 


-- 
Masami HIRAMATSU
IT Management Research Dept. Linux Technology Center
Hitachi, Ltd., Yokohama Research Laboratory
E-mail: masami.hiramatsu.pt@...achi.com


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