linux-ext4 - Re: [RFC 01/10] mm/gup.c: Remove redundant check for PCI P2PDMA page

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Date: Thu, 11 Apr 2024 09:59:16 -0300
From: Jason Gunthorpe <jgg@...dia.com>
To: Alistair Popple <apopple@...dia.com>
Cc: linux-mm@...ck.org, david@...morbit.com, dan.j.williams@...el.com,
	jhubbard@...dia.com, rcampbell@...dia.com, willy@...radead.org,
	linux-fsdevel@...r.kernel.org, jack@...e.cz, djwong@...nel.org,
	hch@....de, david@...hat.com, ruansy.fnst@...itsu.com,
	nvdimm@...ts.linux.dev, linux-xfs@...r.kernel.org,
	linux-ext4@...r.kernel.org, jglisse@...hat.com
Subject: Re: [RFC 01/10] mm/gup.c: Remove redundant check for PCI P2PDMA page

On Thu, Apr 11, 2024 at 10:57:22AM +1000, Alistair Popple wrote:
> PCI P2PDMA pages are not mapped with pXX_devmap PTEs therefore the
> check in __gup_device_huge() is redundant. Remove it
> 
> Signed-off-by: Alistair Popple <apopple@...dia.com>
> ---
>  mm/gup.c | 5 -----
>  1 file changed, 5 deletions(-)

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

Jason