[PATCH] x86/x86_64: pcibus_to_node

Define pcibus_to_node to be able to figure out which NUMA node contains a
given PCI device.  This defines pcibus_to_node(bus) in
include/linux/topology.h and adjusts the macros for i386 and x86_64 that
already provided a way to determine the cpumask of a pci device.

x86_64 was changed to not build an array of cpumasks anymore.  Instead an
array of nodes is build which can be used to generate the cpumask via
node_to_cpumask.

Signed-off-by: Christoph Lameter <christoph@lameter.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2 files changed, 4 insertions, 16 deletions

diff --git a/arch/x86_64/kernel/mpparse.c b/arch/x86_64/kernel/mpparse.c
index 61a63be6b294..ed6a5588146d 100644
--- a/arch/x86_64/kernel/mpparse.c
+++ b/arch/x86_64/kernel/mpparse.c
@@ -23,6 +23,7 @@
 #include <linux/kernel_stat.h>
 #include <linux/mc146818rtc.h>
 #include <linux/acpi.h>
+#include <linux/module.h>
 
 #include <asm/smp.h>
 #include <asm/mtrr.h>
@@ -45,7 +46,8 @@ int acpi_found_madt;
 int apic_version [MAX_APICS];
 unsigned char mp_bus_id_to_type [MAX_MP_BUSSES] = { [0 ... MAX_MP_BUSSES-1] = -1 };
 int mp_bus_id_to_pci_bus [MAX_MP_BUSSES] = { [0 ... MAX_MP_BUSSES-1] = -1 };
-cpumask_t pci_bus_to_cpumask [256] = { [0 ... 255] = CPU_MASK_ALL };
+unsigned char pci_bus_to_node [256];
+EXPORT_SYMBOL(pci_bus_to_node);
 
 static int mp_current_pci_id = 0;
 /* I/O APIC entries */
diff --git a/arch/x86_64/pci/k8-bus.c b/arch/x86_64/pci/k8-bus.c
index 62349c78db57..7e7d0c2a0025 100644
--- a/arch/x86_64/pci/k8-bus.c
+++ b/arch/x86_64/pci/k8-bus.c
@@ -53,25 +53,11 @@ fill_mp_bus_to_cpumask(void)
                                 for (j = SECONDARY_LDT_BUS_NUMBER(ldtbus);
                                      j <= SUBORDINATE_LDT_BUS_NUMBER(ldtbus);
                                      j++)
-                                        pci_bus_to_cpumask[j] =
-                                                node_to_cpumask(NODE_ID(nid));
+                                        pci_bus_to_node[j] = NODE_ID(nid);
                         }
                 }
         }
 
-        /* quick sanity check */
-        printed = 0;
-        for (i = 0; i < 256; i++) {
-                if (cpus_empty(pci_bus_to_cpumask[i])) {
-                        pci_bus_to_cpumask[i] = CPU_MASK_ALL;
-                        if (printed)
-                                continue;
-                        printk(KERN_ERR
-                               "k8-bus.c: some busses have empty cpu mask\n");
-                        printed = 1;
-                }
-        }
-
         return 0;
 }