linux-kernel - Re: [PATCH v9 03/21] ACPI: add arm64 to the platforms that use ioremap

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Message-ID: <2415033.fhZTq8sY1z@vostro.rjw.lan>
Date:	Wed, 04 Mar 2015 23:33:48 +0100
From:	"Rafael J. Wysocki" <rjw@...ysocki.net>
To:	Hanjun Guo <hanjun.guo@...aro.org>
Cc:	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>,
	Olof Johansson <olof@...om.net>,
	Grant Likely <grant.likely@...aro.org>,
	Lorenzo Pieralisi <Lorenzo.Pieralisi@....com>,
	Arnd Bergmann <arnd@...db.de>,
	Mark Rutland <mark.rutland@....com>,
	Graeme Gregory <graeme.gregory@...aro.org>,
	Sudeep Holla <Sudeep.Holla@....com>,
	Jon Masters <jcm@...hat.com>,
	Marc Zyngier <marc.zyngier@....com>,
	Mark Brown <broonie@...nel.org>,
	Robert Richter <rric@...nel.org>,
	Timur Tabi <timur@...eaurora.org>,
	Ashwin Chaugule <ashwinc@...eaurora.org>,
	suravee.suthikulpanit@....com, linux-acpi@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linaro-acpi@...ts.linaro.org, Al Stone <al.stone@...aro.org>
Subject: Re: [PATCH v9 03/21] ACPI: add arm64 to the platforms that use ioremap

On Wednesday, February 25, 2015 04:39:43 PM Hanjun Guo wrote:
> From: Graeme Gregory <graeme.gregory@...aro.org>
> 
> Now with the base changes to the arm memory mapping it is safe
> to convert to using ioremap to map in the tables after
> acpi_gbl_permanent_mmap is set.
> 
> CC: Rafael J Wysocki <rjw@...ysocki.net>
> Tested-by: Robert Richter <rrichter@...ium.com>
> Acked-by: Robert Richter <rrichter@...ium.com>
> Signed-off-by: Al Stone <al.stone@...aro.org>
> Signed-off-by: Graeme Gregory <graeme.gregory@...aro.org>
> Signed-off-by: Hanjun Guo <hanjun.guo@...aro.org>

Acked-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

> ---
>  drivers/acpi/osl.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
> index f9eeae8..39748bb 100644
> --- a/drivers/acpi/osl.c
> +++ b/drivers/acpi/osl.c
> @@ -336,11 +336,11 @@ acpi_map_lookup_virt(void __iomem *virt, acpi_size size)
>  	return NULL;
>  }
>  
> -#ifndef CONFIG_IA64
> -#define should_use_kmap(pfn)   page_is_ram(pfn)
> -#else
> +#if defined(CONFIG_IA64) || defined(CONFIG_ARM64)
>  /* ioremap will take care of cache attributes */
>  #define should_use_kmap(pfn)   0
> +#else
> +#define should_use_kmap(pfn)   page_is_ram(pfn)
>  #endif
>  
>  static void __iomem *acpi_map(acpi_physical_address pg_off, unsigned long pg_sz)
> 

-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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