linux-kernel - Re: [kbuild-all] [RFC PATCH] KASLR: mem_avoid_memmap_index can be static

Open Source and information security mailing list archives

Date:   Mon, 24 Apr 2017 17:04:28 +0800
From:   Fengguang Wu <lkp@...el.com>
To:     Baoquan He <bhe@...hat.com>
Cc:     dave.jiang@...el.com, keescook@...omium.org,
        Yinghai Lu <yinghai@...nel.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
        tglx@...utronix.de, kbuild-all@...org, hpa@...or.com,
        dan.j.williams@...el.com, Borislav Petkov <bp@...e.de>,
        dyoung@...hat.com, mingo@...nel.org
Subject: Re: [kbuild-all] [RFC PATCH] KASLR: mem_avoid_memmap_index can be
 static

Hi Baoquan,

On Mon, Apr 24, 2017 at 05:00:40PM +0800, Baoquan He wrote:
>Hi Fengguang,
>
>Thanks for pointing it out!
>
>I am fine with defining mem_avoid_memmap_index it as static variable.
>While Liyang suggested using a local static inside mem_avoid_memmap,
>then mem_avoid_memmap_index is not needed any more. Do you think it's OK
>to you?

Yes, that'd be a better solution. It's a robot generated patch and is
open for optimization or correction.

Thanks,
Fengguang

>On 04/24/17 at 04:48pm, kbuild test robot wrote:
>>
>> Signed-off-by: Fengguang Wu <fengguang.wu@...el.com>
>> ---
>>  kaslr.c |    2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/arch/x86/boot/compressed/kaslr.c b/arch/x86/boot/compressed/kaslr.c
>> index 6649ecd..7190d35 100644
>> --- a/arch/x86/boot/compressed/kaslr.c
>> +++ b/arch/x86/boot/compressed/kaslr.c
>> @@ -75,7 +75,7 @@ struct mem_vector {
>>  #define MAX_MEMMAP_REGIONS	4
>>
>>  static bool memmap_too_large;
>> -int mem_avoid_memmap_index;
>> +static int mem_avoid_memmap_index;
>>  extern unsigned long get_cmd_line_ptr(void);
>>
>>
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