Workqueues are now initialized as part of the early_initcall(). So
they are available for use during cold boot process aswell.

And also ACPI hotplug notifier no longer calls do_boot_cpu() in the keventd_wq
context.  So we can unconditionally use workqueues in do_boot_cpu()

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Zhang Rui <rui.zhang@intel.com>
---
 arch/x86/kernel/smpboot.c |    8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

Index: tip/arch/x86/kernel/smpboot.c
===================================================================
--- tip.orig/arch/x86/kernel/smpboot.c
+++ tip/arch/x86/kernel/smpboot.c
@@ -735,12 +735,8 @@ static int __cpuinit do_boot_cpu(int api
 		goto do_rest;
 	}
 
-	if (!keventd_up() || current_is_keventd())
-		c_idle.work.func(&c_idle.work);
-	else {
-		schedule_work(&c_idle.work);
-		wait_for_completion(&c_idle.done);
-	}
+	schedule_work(&c_idle.work);
+	wait_for_completion(&c_idle.done);
 
 	if (IS_ERR(c_idle.idle)) {
 		printk("failed fork for CPU %d\n", cpu);