linux-kernel - Re: [PATCH v2 2/2] x86, range: Do not add new blank slot with add_range_with

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Date:	Tue, 11 Jun 2013 09:34:16 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	"Joshua C." <joshuacov@...il.com>
Cc:	Sergey Meirovich <rathamahata@...il.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...e.hu>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 2/2] x86, range: Do not add new blank slot with add_range_with_merge

On Tue, Jun 11, 2013 at 3:04 AM, Joshua C. <joshuacov@...il.com> wrote:
> 2013/6/11 Joshua C. <joshuacov@...il.com>:
>> 2013/6/10 Yinghai Lu <yinghai@...nel.org>:
>>> On Mon, Jun 10, 2013 at 3:55 AM, Sergey Meirovich <rathamahata@...il.com> wrote:
>>>
>>>> patches 1,2(latest one) have not helped me on 3.9.5:
>>>
>>> So v1:
>>> https://patchwork.kernel.org/patch/2694981/
>>> https://patchwork.kernel.org/patch/2694971/
>>>
>>> and v2:
>>> https://patchwork.kernel.org/patch/2695891/
>>> https://patchwork.kernel.org/patch/2695881/
>>>
>>> Neither of two versions fix the problem on your setup?
>>>
>>> Can you post boot log with mtrr_cleanup_debug on 3.9.4?
>>>
>>> Thanks
>>>
>>> Yinghai
>>
>> I got some warnings when trying to build v2 of the patches:
>>
>> # make -s ARCH=x86_64 V=1 -j4 bzImage
>> kernel/range.c: In function 'add_range_with_merge':
>> kernel/range.c:51:3: error: implicit declaration of function 'memmove'
>> [-Werror=implicit-function-declaration]
>> kernel/range.c:51:3: warning: incompatible implicit declaration of
>> built-in function 'memmove' [enabled by default]
>> cc1: some warnings being treated as errors
>> scripts/Makefile.build:307: recipe for target 'kernel/range.o' failed
>> make[1]: *** [kernel/range.o] Error 1
>> Makefile:793: recipe for target 'kernel' failed
>> make: *** [kernel] Error 2
>> make: *** Waiting for unfinished jobs....
>>
>>
>> --
>> --joshua

it does not report warning when I compile it with

gcc (SUSE Linux) 4.7.2 20130108 [gcc-4_7-branch revision 195012

>
> A trivial fix for the above warnings:
>
> --- linux-2.6.orig/kernel/range.c
> +++ linux-2.6/kernel/range.c
> @@ -4,6 +4,7 @@
>  #include <linux/kernel.h>
>  #include <linux/init.h>
>  #include <linux/sort.h>
> +#include <linux/string.h>
>
>  #include <linux/range.h>
>
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