linux-kernel - Re: [PATCH v12 09/11] mm: Allow arch code to override copy

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 5 Mar 2018 12:56:52 -0800
From:   Dave Hansen <dave.hansen@...ux.intel.com>
To:     Khalid Aziz <khalid.aziz@...cle.com>, akpm@...ux-foundation.org,
        davem@...emloft.net
Cc:     kstewart@...uxfoundation.org, pombredanne@...b.com,
        tglx@...utronix.de, anthony.yznaga@...cle.com,
        gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, sparclinux@...r.kernel.org,
        Khalid Aziz <khalid@...ehiking.org>
Subject: Re: [PATCH v12 09/11] mm: Allow arch code to override copy_highpage()

On 03/05/2018 12:42 PM, Khalid Aziz wrote:
> On 03/05/2018 12:24 PM, Dave Hansen wrote:
>> On 02/21/2018 09:15 AM, Khalid Aziz wrote:
>>> +#ifndef __HAVE_ARCH_COPY_HIGHPAGE
>>> +
>>>   static inline void copy_highpage(struct page *to, struct page *from)
>>>   {
>>>       char *vfrom, *vto;
>>> @@ -248,4 +250,6 @@ static inline void copy_highpage(struct page *to,
>>> struct page *from)
>>>       kunmap_atomic(vfrom);
>>>   }
>>>   +#endif
>>
>> I think we prefer that these are CONFIG_* options.
> 
> I added this mechanism to be same as what we have for copy_user_highpage():
> 
> ---------------
> #ifndef __HAVE_ARCH_COPY_USER_HIGHPAGE

I think that's the old way that we generally don't want to add new
instances of.