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authorTejun Heo <tj@kernel.org>2011-01-23 14:37:40 +0100
committerIngo Molnar <mingo@elte.hu>2011-01-28 14:54:09 +0100
commit645a79195f66eb68ef3ab2b21d9829ac3aa085a9 (patch)
tree5808c94ad0371f70a391e1e77baf12465969e19c /arch/x86/kernel/setup_percpu.c
parentbbc9e2f452d9c4b166d1f9a78d941d80173312fe (diff)
download96b-common-645a79195f66eb68ef3ab2b21d9829ac3aa085a9.tar.gz
x86: Unify CPU -> NUMA node mapping between 32 and 64bit
Unlike 64bit, 32bit has been using its own cpu_to_node_map[] for CPU -> NUMA node mapping. Replace it with early_percpu variable x86_cpu_to_node_map and share the mapping code with 64bit. * USE_PERCPU_NUMA_NODE_ID is now enabled for 32bit too. * x86_cpu_to_node_map and numa_set/clear_node() are moved from numa_64 to numa. For now, on 32bit, x86_cpu_to_node_map is initialized with 0 instead of NUMA_NO_NODE. This is to avoid introducing unexpected behavior change and will be updated once init path is unified. * srat_detect_node() is now enabled for x86_32 too. It calls numa_set_node() and initializes the mapping making explicit cpu_to_node_map[] updates from map/unmap_cpu_to_node() unnecessary. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: eric.dumazet@gmail.com Cc: yinghai@kernel.org Cc: brgerst@gmail.com Cc: gorcunov@gmail.com Cc: penberg@kernel.org Cc: shaohui.zheng@intel.com Cc: rientjes@google.com LKML-Reference: <1295789862-25482-15-git-send-email-tj@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: David Rientjes <rientjes@google.com>
Diffstat (limited to 'arch/x86/kernel/setup_percpu.c')
-rw-r--r--arch/x86/kernel/setup_percpu.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/kernel/setup_percpu.c b/arch/x86/kernel/setup_percpu.c
index b5147f00f0ef..71f4727da373 100644
--- a/arch/x86/kernel/setup_percpu.c
+++ b/arch/x86/kernel/setup_percpu.c
@@ -233,6 +233,7 @@ void __init setup_per_cpu_areas(void)
per_cpu(irq_stack_ptr, cpu) =
per_cpu(irq_stack_union.irq_stack, cpu) +
IRQ_STACK_SIZE - 64;
+#endif
#ifdef CONFIG_NUMA
per_cpu(x86_cpu_to_node_map, cpu) =
early_per_cpu_map(x86_cpu_to_node_map, cpu);
@@ -246,7 +247,6 @@ void __init setup_per_cpu_areas(void)
*/
set_cpu_numa_node(cpu, early_cpu_to_node(cpu));
#endif
-#endif
/*
* Up to this point, the boot CPU has been using .init.data
* area. Reload any changed state for the boot CPU.
@@ -263,7 +263,7 @@ void __init setup_per_cpu_areas(void)
#ifdef CONFIG_X86_32
early_per_cpu_ptr(x86_cpu_to_logical_apicid) = NULL;
#endif
-#if defined(CONFIG_X86_64) && defined(CONFIG_NUMA)
+#ifdef CONFIG_NUMA
early_per_cpu_ptr(x86_cpu_to_node_map) = NULL;
#endif