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workqueue: mark init_workqueues() as early_initcall()

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Mark init_workqueues() as early_initcall() and thus it will be initialized
before smp bringup. init_workqueues() registers for the hotcpu notifier
and thus it should cope with the processors that are brought online after
the workqueues are initialized.

x86 smp bringup code uses workqueues and uses a workaround for the
cold boot process (as the workqueues are initialized post smp_init()).
Marking init_workqueues() as early_initcall() will pave the way for
cleaning up this code.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Suresh Siddha 2010-07-30 14:57:37 -07:00 committed by Tejun Heo
parent 098849516d
commit 6ee0578b4d
3 changed files with 3 additions and 4 deletions
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1
include/linux/workqueue.h
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@ -327,7 +327,6 @@ extern int schedule_delayed_work_on(int cpu, struct delayed_work *work,
extern int schedule_on_each_cpu(work_func_t func);
extern int keventd_up(void);
extern void init_workqueues(void);
int execute_in_process_context(work_func_t fn, struct execute_work *);
extern int flush_work(struct work_struct *work);

2
init/main.c
View file

@ -32,7 +32,6 @@
#include <linux/start_kernel.h>
#include <linux/security.h>
#include <linux/smp.h>
#include <linux/workqueue.h>
#include <linux/profile.h>
#include <linux/rcupdate.h>
#include <linux/moduleparam.h>
@ -786,7 +785,6 @@ static void __init do_initcalls(void)
*/
static void __init do_basic_setup(void)
{
init_workqueues();
cpuset_init_smp();
usermodehelper_init();
init_tmpfs();

4
kernel/workqueue.c
View file

@ -3507,7 +3507,7 @@ void thaw_workqueues(void)
}
#endif /* CONFIG_FREEZER */
void __init init_workqueues(void)
static int __init init_workqueues(void)
{
unsigned int cpu;
int i;
@ -3559,4 +3559,6 @@ void __init init_workqueues(void)
system_unbound_wq = alloc_workqueue("events_unbound", WQ_UNBOUND,
WQ_UNBOUND_MAX_ACTIVE);
BUG_ON(!system_wq || !system_long_wq || !system_nrt_wq);
return 0;
}
early_initcall(init_workqueues);