linux-kernel - Re: [PATCH 01/12] mm: Remove PFN_MAP, PFN_SG_CHAIN and PFN_SG

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Message-ID: <20250603133430.GB386142@ziepe.ca>
Date: Tue, 3 Jun 2025 10:34:30 -0300
From: Jason Gunthorpe <jgg@...pe.ca>
To: Alistair Popple <apopple@...dia.com>
Cc: linux-mm@...ck.org, gerald.schaefer@...ux.ibm.com,
	dan.j.williams@...el.com, willy@...radead.org, david@...hat.com,
	linux-kernel@...r.kernel.org, nvdimm@...ts.linux.dev,
	linux-fsdevel@...r.kernel.org, linux-ext4@...r.kernel.org,
	linux-xfs@...r.kernel.org, jhubbard@...dia.com, hch@....de,
	zhang.lyra@...il.com, debug@...osinc.com, bjorn@...nel.org,
	balbirs@...dia.com, lorenzo.stoakes@...cle.com,
	linux-arm-kernel@...ts.infradead.org, loongarch@...ts.linux.dev,
	linuxppc-dev@...ts.ozlabs.org, linux-riscv@...ts.infradead.org,
	linux-cxl@...r.kernel.org, dri-devel@...ts.freedesktop.org,
	John@...ves.net
Subject: Re: [PATCH 01/12] mm: Remove PFN_MAP, PFN_SG_CHAIN and PFN_SG_LAST

On Thu, May 29, 2025 at 04:32:02PM +1000, Alistair Popple wrote:
> The PFN_MAP flag is no longer used for anything, so remove it. The
> PFN_SG_CHAIN and PFN_SG_LAST flags never appear to have been used so
> also remove them.
> 
> Signed-off-by: Alistair Popple <apopple@...dia.com>
> Reviewed-by: Christoph Hellwig <hch@....de>
> ---
>  include/linux/pfn_t.h             | 31 +++----------------------------
>  mm/memory.c                       |  2 --
>  tools/testing/nvdimm/test/iomap.c |  4 ----
>  3 files changed, 3 insertions(+), 34 deletions(-)

Reviewed-by: Jason Gunthorpe <jgg@...dia.com>

Jason