x86: use wait_for_init_deassert in x86_64

wraps the busy loop for wait_for_init_deasserted() in a function,
so smp_callin in x86_64 looks like more i386

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/arch/x86/kernel/smpboot_64.c b/arch/x86/kernel/smpboot_64.c
index 9f4935e..4f6d976 100644 (file)
--- a/arch/x86/kernel/smpboot_64.c
+++ b/arch/x86/kernel/smpboot_64.c
@@ -100,6 +100,13 @@ static void __cpuinit smp_store_cpu_info(int id)
        print_cpu_info(c);
 }
 
+static inline void wait_for_init_deassert(atomic_t *deassert)
+{
+       while (!atomic_read(deassert))
+               cpu_relax();
+       return;
+}
+
 static atomic_t init_deasserted __cpuinitdata;
 
 /*
@@ -117,8 +124,7 @@ void __cpuinit smp_callin(void)
         * our local APIC.  We have to wait for the IPI or we'll
         * lock up on an APIC access.
         */
-       while (!atomic_read(&init_deasserted))
-               cpu_relax();
+       wait_for_init_deassert(&init_deasserted);
 
        /*
         * (This works even if the APIC is not enabled.)