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Message-ID: <6840facc407be_2491100d6@dwillia2-xfh.jf.intel.com.notmuch> Date: Wed, 4 Jun 2025 19:02:52 -0700 From: Dan Williams <dan.j.williams@...el.com> To: Alistair Popple <apopple@...dia.com>, <linux-mm@...ck.org> CC: Alistair Popple <apopple@...dia.com>, <gerald.schaefer@...ux.ibm.com>, <dan.j.williams@...el.com>, <jgg@...pe.ca>, <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 05/12] mm: Remove remaining uses of PFN_DEV Alistair Popple wrote: > PFN_DEV was used by callers of dax_direct_access() to figure out if the > returned PFN is associated with a page using pfn_t_has_page() or > not. However all DAX PFNs now require an assoicated ZONE_DEVICE page so can > assume a page exists. > > Other users of PFN_DEV were setting it before calling > vmf_insert_mixed(). This is unnecessary as it is no longer checked, instead > relying on pfn_valid() to determine if there is an associated page or not. > > Signed-off-by: Alistair Popple <apopple@...dia.com> > Reviewed-by: Christoph Hellwig <hch@....de> Looks good, Reviewed-by: Dan Williams <dan.j.williams@...el.com>
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