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From:   Peng Fan <peng.fan@nxp.com>
To:     "sstabellini@kernel.org" <sstabellini@kernel.org>,
        "linux@armlinux.org.uk" <linux@armlinux.org.uk>,
        "julien.grall@arm.com" <julien.grall@arm.com>
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        <linux-arm-kernel@lists.infradead.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "van.freenix@gmail.com" <van.freenix@gmail.com>
Subject: RE: [PATCH] arm: xen: mm: use __GPF_DMA32 for arm64
Thread-Topic: [PATCH] arm: xen: mm: use __GPF_DMA32 for arm64
Thread-Index: AQHVNi9zmpVhxJk2Z0aPUBEkePn3c6bXnoowgDdoLuA=
Date:   Tue, 27 Aug 2019 09:27:53 +0000
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Ping again..

+Julien

> Subject: RE: [PATCH] arm: xen: mm: use __GPF_DMA32 for arm64
>=20
> Hi Russell, Stefano
>=20
> > Subject: [PATCH] arm: xen: mm: use __GPF_DMA32 for arm64
>=20
> Any comments?
>=20
> >
> > arm64 shares some code under arch/arm/xen, including mm.c.
> > However ZONE_DMA is removed by commit
> > ad67f5a6545("arm64: replace ZONE_DMA with ZONE_DMA32").
> > So to ARM64, need use __GFP_DMA32.
> >
> > Signed-off-by: Peng Fan <peng.fan@nxp.com>
> > ---
> >  arch/arm/xen/mm.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/arch/arm/xen/mm.c b/arch/arm/xen/mm.c index
> > e1d44b903dfc..a95e76d18bf9 100644
> > --- a/arch/arm/xen/mm.c
> > +++ b/arch/arm/xen/mm.c
> > @@ -27,7 +27,7 @@ unsigned long xen_get_swiotlb_free_pages(unsigned
> int
> > order)
> >
> >  	for_each_memblock(memory, reg) {
> >  		if (reg->base < (phys_addr_t)0xffffffff) {
> > -			flags |=3D __GFP_DMA;
> > +			flags |=3D __GFP_DMA | __GFP_DMA32;
> >  			break;
> >  		}
> >  	}
>=20
> Thanks,
> Peng.

Thanks,
Peng.

>=20
> > --
> > 2.16.4