linux-kernel - Re: [PATCH 1/2] ARM: mm: Refactor __do_page

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]

Message-ID: <20210601143125.GB30436@shell.armlinux.org.uk>
Date:   Tue, 1 Jun 2021 15:31:26 +0100
From:   "Russell King (Oracle)" <linux@...linux.org.uk>
To:     Kefeng Wang <wangkefeng.wang@...wei.com>
Cc:     linux-arm-kernel@...ts.infradead.org,
        Catalin Marinas <catalin.marinas@....com>,
        linux-kernel@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Jungseung Lee <js07.lee@...il.com>
Subject: Re: [PATCH 1/2] ARM: mm: Refactor __do_page_fault()

On Sat, May 29, 2021 at 11:41:37AM +0800, Kefeng Wang wrote:
> 1. cleanup access_error(), make vma flags set and check into
>    __do_page_fault() and do_page_fault() directly.
> 
> 2. drop fsr and task argument, instead, using vm_flags in
>    __do_page_fault().
> 
> 3. cleans up the multiple goto statements in __do_page_fault().
> 
> 4. use current->mm directly in do_page_fault().
> 
> Signed-off-by: Kefeng Wang <wangkefeng.wang@...wei.com>

This patch is a really good example of something that is very difficult
to review and see that there are no unintended changes.

Many people have complained about my patches, where I create a series of
many patches where each patch does exactly _one_ simple transformation to
the code. This is a good example _why_ I do that - a step by step single
transformation approach is way easier to review.

Sorry, but I'm not able to sensibly review this patch, and therefore
I won't apply it. Please split it into smaller changes.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!