linux-kernel - Re: [PATCH 11/22] KVM: MMU: Add infrastructure for two-level page walker

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Message-ID: <4BD6D9C2.6020104@redhat.com>
Date:	Tue, 27 Apr 2010 15:34:10 +0300
From:	Avi Kivity <avi@...hat.com>
To:	Joerg Roedel <joerg.roedel@....com>
CC:	Marcelo Tosatti <mtosatti@...hat.com>, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 11/22] KVM: MMU: Add infrastructure for two-level page
 walker

On 04/27/2010 01:38 PM, Joerg Roedel wrote:
> This patch introduces a mmu-callback to translate gpa
> addresses in the walk_addr code. This is later used to
> translate l2_gpa addresses into l1_gpa addresses.
>
> +static inline gfn_t gpa_to_gfn(gpa_t gpa)
> +{
> +	return (gfn_t)gpa>>  PAGE_SHIFT;
> +}
> +
>    

This overflows on 32-bit, since gpa_t is u64 and gfn_t is ulong.

-- 
error compiling committee.c: too many arguments to function

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