linux-kernel - Re: [PATCH] mm: move dummy_vm

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Message-ID: <CAGudoHHXa47bGqBh5QELBmpT1zS2znjT9U52Tb+bp=g3zq5Cww@mail.gmail.com>
Date:   Mon, 7 Aug 2023 12:48:53 +0200
From:   Mateusz Guzik <mjguzik@...il.com>
To:     Matthew Wilcox <willy@...radead.org>
Cc:     akpm@...ux-foundation.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm: move dummy_vm_ops out of a header

On 8/7/23, Matthew Wilcox <willy@...radead.org> wrote:
> On Mon, Aug 07, 2023 at 01:16:11AM +0200, Mateusz Guzik wrote:
>> Otherwise the kernel ends up with multiple copies:
>> $ nm vmlinux | grep dummy_vm_ops
>> ffffffff81e4ea00 d dummy_vm_ops.2
>> ffffffff81e11760 d dummy_vm_ops.254
>> ffffffff81e406e0 d dummy_vm_ops.4
>> ffffffff81e3c780 d dummy_vm_ops.7
>>
>> While here prefix it with vma_.
>
> It really shouldn't be prefixed with vma.  Other than that, I love this
> patch.
>

I think an unprefixed global is iffy, but I'm not going to insist on
semi-cosmetics.

The one thing I expected people to complain about is the location of
the struct. The mm_init.c file was the least bad choice I found, but
maybe something else is preferred?
I'm just trying to avoid sending V3 for this patch after someone
claims dummy ops should land elsewhere. ;)

-- 
Mateusz Guzik <mjguzik gmail.com>