linux-kernel - Re: [PATCH 3/4] mm: move_page_tables{,

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Message-Id: <20070605163920.8066af33.akpm@linux-foundation.org>
Date:	Tue, 5 Jun 2007 16:39:20 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	linux-kernel@...r.kernel.org, parisc-linux@...ts.parisc-linux.org,
	linux-mm@...ck.org, linux-arch@...r.kernel.org,
	Ollie Wild <aaw@...gle.com>, Ingo Molnar <mingo@...e.hu>,
	Andi Kleen <ak@...e.de>
Subject: Re: [PATCH 3/4] mm: move_page_tables{,_up}

On Tue, 05 Jun 2007 17:05:26 +0200
Peter Zijlstra <a.p.zijlstra@...llo.nl> wrote:

> Provide functions for moving page tables upwards.
> 
> ...
>
> +extern unsigned long move_page_tables(struct vm_area_struct *vma,
> +		unsigned long old_addr, struct vm_area_struct *new_vma,
> +		unsigned long new_addr, unsigned long len);
> +extern unsigned long move_page_tables_up(struct vm_area_struct *vma,
> +		unsigned long old_addr, struct vm_area_struct *new_vma,
> +		unsigned long new_addr, unsigned long len);
>  extern unsigned long do_mremap(unsigned long addr,
>  			       unsigned long old_len, unsigned long new_len,
>  			       unsigned long flags, unsigned long new_addr);

They become kernel-wide

> +static void move_ptes_up(struct vm_area_struct *vma, pmd_t *old_pmd,
> +		unsigned long old_addr, unsigned long old_end,
> +		struct vm_area_struct *new_vma, pmd_t *new_pmd,
> +		unsigned long new_addr)

So some documentation might be in order...

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