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Date: Mon, 2 Feb 2015 20:45:30 +0800
From: Hanjun Guo <hanjun.guo@...aro.org>
To: Catalin Marinas <catalin.marinas@....com>,
"Rafael J. Wysocki" <rjw@...ysocki.net>,
Olof Johansson <olof@...om.net>, Arnd Bergmann <arnd@...db.de>,
Mark Rutland <mark.rutland@....com>,
Grant Likely <grant.likely@...aro.org>,
Will Deacon <will.deacon@....com>
Cc: Lorenzo Pieralisi <Lorenzo.Pieralisi@....com>,
Graeme Gregory <graeme.gregory@...aro.org>,
Sudeep Holla <Sudeep.Holla@....com>,
Jon Masters <jcm@...hat.com>,
Jason Cooper <jason@...edaemon.net>,
Marc Zyngier <marc.zyngier@....com>,
Bjorn Helgaas <bhelgaas@...gle.com>,
Daniel Lezcano <daniel.lezcano@...aro.org>,
Mark Brown <broonie@...nel.org>, Rob Herring <robh@...nel.org>,
Robert Richter <rric@...nel.org>,
Randy Dunlap <rdunlap@...radead.org>,
Charles.Garcia-Tobin@....com, phoenix.liyi@...wei.com,
Timur Tabi <timur@...eaurora.org>,
Ashwin Chaugule <ashwinc@...eaurora.org>,
suravee.suthikulpanit@....com,
Mark Langsdorf <mlangsdo@...hat.com>, wangyijing@...wei.com,
linux-acpi@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org, linaro-acpi@...ts.linaro.org,
Mark Salter <msalter@...hat.com>,
Hanjun Guo <hanjun.guo@...aro.org>
Subject: [PATCH v8 02/21] acpi: fix acpi_os_ioremap for arm64
From: Mark Salter <msalter@...hat.com>
The acpi_os_ioremap() function may be used to map normal RAM or IO
regions. The current implementation simply uses ioremap_cache(). This
will work for some architectures, but arm64 ioremap_cache() cannot be
used to map IO regions which don't support caching. So for arm64, use
ioremap() for non-RAM regions.
CC: Rafael J Wysocki <rjw@...ysocki.net>
Signed-off-by: Mark Salter <msalter@...hat.com>
Signed-off-by: Hanjun Guo <hanjun.guo@...aro.org>
---
include/acpi/acpi_io.h | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/include/acpi/acpi_io.h b/include/acpi/acpi_io.h
index 444671e..9d573db 100644
--- a/include/acpi/acpi_io.h
+++ b/include/acpi/acpi_io.h
@@ -1,11 +1,17 @@
#ifndef _ACPI_IO_H_
#define _ACPI_IO_H_
+#include <linux/mm.h>
#include <linux/io.h>
static inline void __iomem *acpi_os_ioremap(acpi_physical_address phys,
acpi_size size)
{
+#ifdef CONFIG_ARM64
+ if (!page_is_ram(phys >> PAGE_SHIFT))
+ return ioremap(phys, size);
+#endif
+
return ioremap_cache(phys, size);
}
--
1.9.1
--
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