Re: [PATCH v3 25/25] Revert "riscv: mm: Add support for ZONE_DEVICE"

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To: Alistair Popple <apopple@xxxxxxxxxx>, dan.j.williams@xxxxxxxxx, linux-mm@xxxxxxxxx
Subject: Re: [PATCH v3 25/25] Revert "riscv: mm: Add support for ZONE_DEVICE"
From: Björn Töpel <bjorn@xxxxxxxxxx>
Date: Mon, 25 Nov 2024 14:13:17 +0100
Cc: Alistair Popple <apopple@xxxxxxxxxx>, lina@xxxxxxxxxxxxx, zhang.lyra@xxxxxxxxx, gerald.schaefer@xxxxxxxxxxxxx, vishal.l.verma@xxxxxxxxx, dave.jiang@xxxxxxxxx, logang@xxxxxxxxxxxx, bhelgaas@xxxxxxxxxx, jack@xxxxxxx, jgg@xxxxxxxx, catalin.marinas@xxxxxxx, will@xxxxxxxxxx, mpe@xxxxxxxxxxxxxx, npiggin@xxxxxxxxx, dave.hansen@xxxxxxxxxxxxxxx, ira.weiny@xxxxxxxxx, willy@xxxxxxxxxxxxx, djwong@xxxxxxxxxx, tytso@xxxxxxx, linmiaohe@xxxxxxxxxx, david@xxxxxxxxxx, peterx@xxxxxxxxxx, linux-doc@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, linuxppc-dev@xxxxxxxxxxxxxxxx, nvdimm@xxxxxxxxxxxxxxx, linux-cxl@xxxxxxxxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx, linux-ext4@xxxxxxxxxxxxxxx, linux-xfs@xxxxxxxxxxxxxxx, jhubbard@xxxxxxxxxx, hch@xxxxxx, david@xxxxxxxxxxxxx, linux-riscv@xxxxxxxxxxxxxxxxxxx
In-reply-to: <f511de7cb9817e2e2fdd274ee842c228d699abea.1732239628.git-series.apopple@nvidia.com>

Alistair Popple <apopple@xxxxxxxxxx> writes:

> DEVMAP PTEs are no longer required to support ZONE_DEVICE so remove
> them.
>
> Signed-off-by: Alistair Popple <apopple@xxxxxxxxxx>
> Suggested-by: Chunyan Zhang <zhang.lyra@xxxxxxxxx>

Oh, we're getting the bit back! Thanks!

Reviewed-by: Björn Töpel <bjorn@xxxxxxxxxxxx>

References:
- [PATCH v3 00/25] fs/dax: Fix ZONE_DEVICE page reference counts
  - From: Alistair Popple
- [PATCH v3 25/25] Revert "riscv: mm: Add support for ZONE_DEVICE"
  - From: Alistair Popple

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