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

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Message-ID: <20070726201815.GB6387@uranus.ravnborg.org>
Date:	Thu, 26 Jul 2007 22:18:15 +0200
From:	Sam Ravnborg <sam@...nborg.org>
To:	Yinghai Lu <yhlu.kernel@...il.com>
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 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

	Sam


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