call it right after we done with MADT/mptable handling, instead of doing that
in setup_per_cpu_areas later...
so for_possible_cpu could be used early.
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
---
arch/x86/kernel/setup.c | 1 +
arch/x86/kernel/setup_percpu.c | 10 ----------
arch/x86/kernel/smpboot.c | 8 ++++++++
include/asm-x86/smp.h | 4 ++++
4 files changed, 13 insertions(+), 10 deletions(-)
Index: linux-2.6/arch/x86/kernel/setup.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/setup.c
+++ linux-2.6/arch/x86/kernel/setup.c
@@ -788,6 +788,7 @@ void __init setup_arch(char **cmdline_p)
get_smp_config();
#endif
+ prefill_possible_map();
#ifdef CONFIG_X86_64
init_cpu_to_node();
#endif
Index: linux-2.6/arch/x86/kernel/setup_percpu.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/setup_percpu.c
+++ linux-2.6/arch/x86/kernel/setup_percpu.c
@@ -162,16 +162,6 @@ void __init setup_per_cpu_areas(void)
char *ptr;
int cpu;
- /* no processor from mptable or madt */
- if (!num_processors)
- num_processors = 1;
-
-#ifdef CONFIG_HOTPLUG_CPU
- prefill_possible_map();
-#else
- nr_cpu_ids = num_processors;
-#endif
-
/* Setup cpu_pda map */
setup_cpu_pda_map();
Index: linux-2.6/arch/x86/kernel/smpboot.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/smpboot.c
+++ linux-2.6/arch/x86/kernel/smpboot.c
@@ -1278,12 +1278,20 @@ __init void prefill_possible_map(void)
int i;
int possible;
+ /* no processor from mptable or madt */
+ if (!num_processors)
+ num_processors = 1;
+
+#ifdef CONFIG_HOTPLUG_CPU
if (additional_cpus == -1) {
if (disabled_cpus > 0)
additional_cpus = disabled_cpus;
else
additional_cpus = 0;
}
+#else
+ additional_cpus = 0;
+#endif
possible = num_processors + additional_cpus;
if (possible > NR_CPUS)
possible = NR_CPUS;
Index: linux-2.6/include/asm-x86/smp.h
===================================================================
--- linux-2.6.orig/include/asm-x86/smp.h
+++ linux-2.6/include/asm-x86/smp.h
@@ -124,6 +124,10 @@ static inline int num_booting_cpus(void)
{
return cpus_weight(cpu_callout_map);
}
+#else
+static inline void prefill_possible_map(void)
+{
+}
#endif /* CONFIG_SMP */
extern unsigned disabled_cpus __cpuinitdata;
--
