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Re: [Xen-devel] [PATCH] arm: xen: mm: use __GPF_DMA32 for arm64
- To: "sstabellini@xxxxxxxxxx" <sstabellini@xxxxxxxxxx>, "linux@xxxxxxxxxxxxxxx" <linux@xxxxxxxxxxxxxxx>
- From: Peng Fan <peng.fan@xxxxxxx>
- Date: Tue, 23 Jul 2019 03:21:14 +0000
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- Cc: "van.freenix@xxxxxxxxx" <van.freenix@xxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>, dl-linux-imx <linux-imx@xxxxxxx>, "linux-arm-kernel@xxxxxxxxxxxxxxxxxxx" <linux-arm-kernel@xxxxxxxxxxxxxxxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>
- Delivery-date: Tue, 23 Jul 2019 03:21:37 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
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- Thread-topic: [PATCH] arm: xen: mm: use __GPF_DMA32 for arm64
Hi Russell, Stefano
> Subject: [PATCH] arm: xen: mm: use __GPF_DMA32 for arm64
Any comments?
>
> 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@xxxxxxx>
> ---
> 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 |= __GFP_DMA;
> + flags |= __GFP_DMA | __GFP_DMA32;
> break;
> }
> }
Thanks,
Peng.
> --
> 2.16.4
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