linux-kernel - Re: [PATCH v2 1/3] mm: highmem: export kmap_to

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Date:	Mon, 22 Oct 2012 15:08:18 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Will Deacon <will.deacon@....com>
Cc:	linux-kernel@...r.kernel.org, rusty@...tcorp.com.au,
	levinsasha928@...il.com, Marc.Zyngier@....com,
	virtualization@...ts.linux-foundation.org, ericvh@...il.com
Subject: Re: [PATCH v2 1/3] mm: highmem: export kmap_to_page for modules

On Fri, 19 Oct 2012 14:03:31 +0100
Will Deacon <will.deacon@....com> wrote:

> Some virtio device drivers (9p) need to translate high virtual addresses
> to physical addresses, which are inserted into the virtqueue for
> processing by userspace.
> 
> This patch exports the kmap_to_page symbol, so that the affected drivers
> can be compiled as modules.
> 
> Signed-off-by: Will Deacon <will.deacon@....com>
> ---
>  mm/highmem.c |    1 +
>  1 files changed, 1 insertions(+), 0 deletions(-)
> 
> diff --git a/mm/highmem.c b/mm/highmem.c
> index d517cd1..2a07f97 100644
> --- a/mm/highmem.c
> +++ b/mm/highmem.c
> @@ -105,6 +105,7 @@ struct page *kmap_to_page(void *vaddr)
>  
>  	return virt_to_page(addr);
>  }
> +EXPORT_SYMBOL(kmap_to_page);
>  

Looks OK to me.  Would generally prefer that an exported-to-modules
symbol have some documentation, but I guess this one is obvious enough.

Rusty, please include this if you grab the rest of the series.

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