linux-kernel - Re: [PATCH 1/5] x86_64: get mp_bus_to

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Date:	Thu, 26 Jul 2007 13:39:47 -0700
From:	"Yinghai Lu" <yhlu.kernel@...il.com>
To:	"Sam Ravnborg" <sam@...nborg.org>
Cc:	"Andrew Morton" <akpm@...ux-foundation.org>,
	"Andi Kleen" <ak@...e.de>, "Christoph Lameter" <clameter@....com>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/5] x86_64: get mp_bus_to_node as early v2

On 7/26/07, Sam Ravnborg <sam@...nborg.org> wrote:
> On Thu, Jul 26, 2007 at 01:05:09PM -0700, Yinghai Lu wrote:
> >
> +#ifdef CONFIG_ACPI_NUMA
>         int pxm;
> -
> -       /* Allocate per-root-bus (not per bus) arch-specific data.
> -        * TODO: leak; this memory is never freed.
> -        * It's arguable whether it's worth the trouble to care.
> -        */
> -       sd = kzalloc(sizeof(*sd), GFP_KERNEL);
> -       if (!sd) {
> -               printk(KERN_ERR "PCI: OOM, not probing PCI bus %02x\n", busnum);
> -               return NULL;
> -       }
> +       int node;
> +#endif
>
>         if (domain != 0) {
>                 printk(KERN_WARNING "PCI: Multiple domains not supported\n");
> -               kfree(sd);
>                 return NULL;
>         }
>
> -       sd->node = -1;
> -
> -       pxm = acpi_get_pxm(device->handle);
>  #ifdef CONFIG_ACPI_NUMA
> -       if (pxm >= 0)
> -               sd->node = pxm_to_node(pxm);
> +       pxm = acpi_get_pxm(device->handle);
> +       if (pxm >= 0) {
> +               node = pxm_to_node(pxm);
> +               printk(KERN_INFO "bus %02x -> pxm %d -> node %02x\n",
> +                       busnum, pxm, node);
> +               set_mp_bus_to_node(busnum, node);
> +       }
>  #endif
> The local variable 'node' is only used in the above if statement.
> So moving the definition inside the if statement will save one pair
> of ugly #ifdef/#endif

yes, that could be move there. but that pair ugly #ifdef/#endif still
need for pxm...

YH
-
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