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From: Suresh Siddha on 30 Jul 2010 18:10
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(a)intel.com>
Cc: Andrew Morton <akpm(a)linux-foundation.org>
Cc: Zhang Rui <rui.zhang(a)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);


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