32 lines
1 KiB
Diff
32 lines
1 KiB
Diff
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From ef25bf644b7de83849a2f804c84bb54cd2f1255f Mon Sep 17 00:00:00 2001
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From: Alison Wang <b18965@freescale.com>
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Date: Mon, 11 Apr 2016 17:25:40 +0800
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Subject: [PATCH 09/70] armv8: aarch32: Allow RAM to be mapped for LayerScape
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SoC
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This patch is based on Kernel v4.1.8. As in v4.1.8, memremap() is not
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introduced and the WARN() check is not relaxed to allow MT_MEMORY_RW
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mappings of pfn_valid() pages, this patch is needed as a workaround for
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spin-table address which locates in RAM to be mapped.
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For the latest kernel in upstream, this patch is not needed anymore.
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Signed-off-by: Alison Wang <alison.wang@nxp.com>
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---
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arch/arm/mm/ioremap.c | 2 ++
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1 file changed, 2 insertions(+)
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--- a/arch/arm/mm/ioremap.c
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+++ b/arch/arm/mm/ioremap.c
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@@ -298,8 +298,10 @@ static void __iomem * __arm_ioremap_pfn_
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/*
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* Don't allow RAM to be mapped - this causes problems with ARMv6+
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*/
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+#ifndef CONFIG_ARCH_LAYERSCAPE
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if (WARN_ON(pfn_valid(pfn)))
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return NULL;
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+#endif
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area = get_vm_area_caller(size, VM_IOREMAP, caller);
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if (!area)
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