linux-kernel - Re: [RFC 03/23] ARM: LPAE: use phys_addr

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Message-ID: <20120724103717.GF20132@arm.com>
Date:	Tue, 24 Jul 2012 11:37:17 +0100
From:	Catalin Marinas <catalin.marinas@....com>
To:	Cyril Chemparathy <cyril@...com>
Cc:	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"nico@...aro.org" <nico@...aro.org>,
	Will Deacon <Will.Deacon@....com>,
	Vitaly Andrianov <vitalya@...com>
Subject: Re: [RFC 03/23] ARM: LPAE: use phys_addr_t on virt <--> phys
 conversion

On Tue, Jul 24, 2012 at 02:09:05AM +0100, Cyril Chemparathy wrote:
> This patch fixes up the types used when converting back and forth between
> physical and virtual addresses.
> 
> Signed-off-by: Vitaly Andrianov <vitalya@...com>
> Signed-off-by: Cyril Chemparathy <cyril@...com>
> ---
>  arch/arm/include/asm/memory.h |   17 +++++++++++------
>  1 file changed, 11 insertions(+), 6 deletions(-)
> 
> diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h
> index fcb5757..7629dfe 100644
> --- a/arch/arm/include/asm/memory.h
> +++ b/arch/arm/include/asm/memory.h
> @@ -169,22 +169,27 @@ extern unsigned long __pv_phys_offset;
>  	: "=r" (to)					\
>  	: "r" (from), "I" (type))
>  
> -static inline unsigned long __virt_to_phys(unsigned long x)
> +static inline phys_addr_t __virt_to_phys(unsigned long x)
>  {
>  	unsigned long t;
>  	__pv_stub(x, t, "add", __PV_BITS_31_24);
>  	return t;
>  }
>  
> -static inline unsigned long __phys_to_virt(unsigned long x)
> +static inline unsigned long __phys_to_virt(phys_addr_t x)
>  {
>  	unsigned long t;
>  	__pv_stub(x, t, "sub", __PV_BITS_31_24);
>  	return t;
>  }

BTW, I would prefer if the phys-to-virt patching was fixed as well. It
shouldn't be difficult.

-- 
Catalin
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