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authorTejun Heo <tj@kernel.org>2011-05-02 16:18:52 +0400
committerTejun Heo <tj@kernel.org>2011-05-02 16:18:52 +0400
commit6bd262731bf7559bab8c749786e8652e2df1fb4e (patch)
tree64f3dccdda9175a2f2694a5d554779b8af5f035a /arch/x86/mm/numa.c
parentc4b90c11992e61123071977c0e5556e59a70852c (diff)
downloadlinux-6bd262731bf7559bab8c749786e8652e2df1fb4e.tar.xz
x86, NUMA: Unify 32/64bit numa_cpu_node() implementation
Currently, the only meaningful user of apic->x86_32_numa_cpu_node() is NUMAQ which returns valid mapping only after CPU is initialized during SMP bringup; thus, the previous patch to set apicid -> node in setup_local_APIC() makes __apicid_to_node[] always contain the correct mapping whether custom apic->x86_32_numa_cpu_node() is used or not. So, there is no reason to keep separate 32bit implementation. We can always consult __apicid_to_node[]. Move 64bit implementation from numa_64.c to numa.c and remove 32bit implementation from numa_32.c. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com>
Diffstat (limited to 'arch/x86/mm/numa.c')
-rw-r--r--arch/x86/mm/numa.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c
index 745258dfc4dc..e9005c4ea29a 100644
--- a/arch/x86/mm/numa.c
+++ b/arch/x86/mm/numa.c
@@ -32,6 +32,15 @@ s16 __apicid_to_node[MAX_LOCAL_APIC] __cpuinitdata = {
[0 ... MAX_LOCAL_APIC-1] = NUMA_NO_NODE
};
+int __cpuinit numa_cpu_node(int cpu)
+{
+ int apicid = early_per_cpu(x86_cpu_to_apicid, cpu);
+
+ if (apicid != BAD_APICID)
+ return __apicid_to_node[apicid];
+ return NUMA_NO_NODE;
+}
+
cpumask_var_t node_to_cpumask_map[MAX_NUMNODES];
EXPORT_SYMBOL(node_to_cpumask_map);