linux-kernel - Re: [PATCH] [4/31] Add pte

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Message-ID: <87zlv7fdm7.fsf@saeurebad.de>
Date:	Tue, 15 Jan 2008 14:00:00 +0100
From:	Johannes Weiner <hannes@...urebad.de>
To:	Andi Kleen <ak@...e.de>
Cc:	linux-kernel@...r.kernel.org, jbeulich@...ell.com, mingo@...e.hu,
	tglx@...utronix.de
Subject: Re: [PATCH] [4/31] Add pte_pgprot on i386

Hi,

Andi Kleen <ak@...e.de> writes:

[...]
> --- linux.orig/include/asm-x86/pgtable-2level.h
> +++ linux/include/asm-x86/pgtable-2level.h
> @@ -75,6 +75,8 @@ static inline int pte_exec_kernel(pte_t 
>  #define pgoff_to_pte(off) \
>  	((pte_t) { .pte_low = (((off) & 0x1f) << 1) + (((off) >> 5) << 8) + _PAGE_FILE })
>  
> +#define pte_pgprot(x) __pgprot((x).pte_low & 0xfff)

[...]

> --- linux.orig/include/asm-x86/pgtable-3level.h
> +++ linux/include/asm-x86/pgtable-3level.h
> @@ -142,6 +142,8 @@ static inline unsigned long pte_pfn(pte_
>  	return pte_val(pte) >> PAGE_SHIFT;
>  }
>  
> +#define pte_pgprot(x) __pgprot(pte_val(x) & (0xfff | _PAGE_NX))

Could we use pte_val() in both cases?

	Hannes
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