x86: print local APIC of APs one by one

instead of print that of all APs at the time

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 6 insertions, 1 deletions

diff --git a/arch/x86/kernel/io_apic.c b/arch/x86/kernel/io_apic.c
index 5de2d38812aa..bf0e66d73030 100644
--- a/arch/x86/kernel/io_apic.c
+++ b/arch/x86/kernel/io_apic.c
@@ -1777,7 +1777,12 @@ __apicdebuginit(void) print_local_APIC(void *dummy)
 
 __apicdebuginit(void) print_all_local_APICs(void)
 {
-        on_each_cpu(print_local_APIC, NULL, 1);
+        int cpu;
+
+        preempt_disable();
+        for_each_online_cpu(cpu)
+                smp_call_function_single(cpu, print_local_APIC, NULL, 1);
+        preempt_enable();
 }
 
 __apicdebuginit(void) print_PIC(void)