linux-kernel - Re: [3/4] add agp_generic_destroy

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Date:	Wed, 20 Aug 2008 20:08:07 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Shaohua Li <shaohua.li@...el.com>
Cc:	lkml <linux-kernel@...r.kernel.org>,
	Dave Airlie <airlied@...il.com>, Ingo Molnar <mingo@...e.hu>,
	Arjan van de Ven <arjan@...radead.org>
Subject: Re: [3/4] add agp_generic_destroy_pages()

On Thu, 21 Aug 2008 10:46:17 +0800 Shaohua Li <shaohua.li@...el.com> wrote:

> --- linux.orig/drivers/char/agp/generic.c	2008-08-21 10:01:34.000000000 +0800
> +++ linux/drivers/char/agp/generic.c	2008-08-21 10:01:40.000000000 +0800
> @@ -201,14 +201,22 @@ void agp_free_memory(struct agp_memory *
>  		return;
>  	}
>  	if (curr->page_count != 0) {
> -		for (i = 0; i < curr->page_count; i++) {
> -			curr->memory[i] = (unsigned long)gart_to_virt(curr->memory[i]);
> -			curr->bridge->driver->agp_destroy_page((void *)curr->memory[i],
> -							       AGP_PAGE_DESTROY_UNMAP);
> -		}
> -		for (i = 0; i < curr->page_count; i++) {
> -			curr->bridge->driver->agp_destroy_page((void *)curr->memory[i],
> -							       AGP_PAGE_DESTROY_FREE);
> +		if (curr->bridge->driver->agp_destroy_pages) {
> +			curr->bridge->driver->agp_destroy_pages(curr);
> +		} else {

stylistic nit:

> +
> +			for (i = 0; i < curr->page_count; i++) {
> +				curr->memory[i] = (unsigned long)gart_to_virt(
> +					curr->memory[i]);
> +				curr->bridge->driver->agp_destroy_page(
> +					(void *)curr->memory[i],
> +					AGP_PAGE_DESTROY_UNMAP);
> +			}
> +			for (i = 0; i < curr->page_count; i++) {
> +				curr->bridge->driver->agp_destroy_page(
> +					(void *)curr->memory[i],
> +					AGP_PAGE_DESTROY_FREE);
> +			}

Make the above code a standalone function and call it here.

Then convert all drivers over so their .agp_destroy_pages points at
that new function.

Then remove the `if'.
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