From: Peng Fan <peng.fan@nxp.com>
To: "sstabellini@kernel.org" <sstabellini@kernel.org>,
"linux@armlinux.org.uk" <linux@armlinux.org.uk>,
"catalin.marinas@arm.com" <catalin.marinas@arm.com>,
"will@kernel.org" <will@kernel.org>,
"robin.murphy@arm.com" <robin.murphy@arm.com>
Cc: "xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>,
Peng Fan <peng.fan@nxp.com>, dl-linux-imx <linux-imx@nxp.com>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>
Subject: [PATCH V3] arm: xen: mm: use __GPF_DMA32 for arm64
Date: Mon, 16 Sep 2019 09:51:33 +0000 [thread overview]
Message-ID: <1568627400-21335-1-git-send-email-peng.fan@nxp.com> (raw)
From: Peng Fan <peng.fan@nxp.com>
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 add a check if CONFIG_ZONE_DMA32 is enabled use __GFP_DMA32.
Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
V3:
Use IS_ENABLED(CONFIG_ZONE_DMA32) and drop xen_set_gfp_dma.
V2:
Follow suggestion from Stefano,
introduce static inline void xen_set_gfp_dma(gfp_t *flags) for arm32/arm64, and
for arm64 using __GFP_DMA for the former and __GFP_DMA32 for the latter.
arch/arm/xen/mm.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/arch/arm/xen/mm.c b/arch/arm/xen/mm.c
index 2b2c208408bb..38fa917c8585 100644
--- a/arch/arm/xen/mm.c
+++ b/arch/arm/xen/mm.c
@@ -28,7 +28,10 @@ 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;
+ if (IS_ENABLED(CONFIG_ZONE_DMA32))
+ flags |= __GFP_DMA32;
+ else
+ flags |= __GFP_DMA;
break;
}
}
--
2.16.4
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next reply other threads:[~2019-09-16 9:51 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-16 9:51 Peng Fan [this message]
2019-10-02 1:32 ` [PATCH V3] arm: xen: mm: use __GPF_DMA32 for arm64 Stefano Stabellini
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