aboutsummaryrefslogtreecommitdiff
path: root/kernel
diff options
context:
space:
mode:
Diffstat (limited to 'kernel')
-rw-r--r--kernel/sys.c23
-rw-r--r--kernel/workqueue.c21
2 files changed, 37 insertions, 7 deletions
diff --git a/kernel/sys.c b/kernel/sys.c
index 1828f8d1084..ce17760d9c5 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -1548,24 +1548,37 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3,
if (arg4 | arg5)
return -EINVAL;
switch (arg2) {
- case 0:
+ case PR_MCE_KILL_CLEAR:
if (arg3 != 0)
return -EINVAL;
current->flags &= ~PF_MCE_PROCESS;
break;
- case 1:
+ case PR_MCE_KILL_SET:
current->flags |= PF_MCE_PROCESS;
- if (arg3 != 0)
+ if (arg3 == PR_MCE_KILL_EARLY)
current->flags |= PF_MCE_EARLY;
- else
+ else if (arg3 == PR_MCE_KILL_LATE)
current->flags &= ~PF_MCE_EARLY;
+ else if (arg3 == PR_MCE_KILL_DEFAULT)
+ current->flags &=
+ ~(PF_MCE_EARLY|PF_MCE_PROCESS);
+ else
+ return -EINVAL;
break;
default:
return -EINVAL;
}
error = 0;
break;
-
+ case PR_MCE_KILL_GET:
+ if (arg2 | arg3 | arg4 | arg5)
+ return -EINVAL;
+ if (current->flags & PF_MCE_PROCESS)
+ error = (current->flags & PF_MCE_EARLY) ?
+ PR_MCE_KILL_EARLY : PR_MCE_KILL_LATE;
+ else
+ error = PR_MCE_KILL_DEFAULT;
+ break;
default:
error = -EINVAL;
break;
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 47cdd7e76f2..12328147132 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -685,21 +685,38 @@ EXPORT_SYMBOL(schedule_delayed_work_on);
int schedule_on_each_cpu(work_func_t func)
{
int cpu;
+ int orig = -1;
struct work_struct *works;
works = alloc_percpu(struct work_struct);
if (!works)
return -ENOMEM;
+ /*
+ * when running in keventd don't schedule a work item on itself.
+ * Can just call directly because the work queue is already bound.
+ * This also is faster.
+ * Make this a generic parameter for other workqueues?
+ */
+ if (current_is_keventd()) {
+ orig = raw_smp_processor_id();
+ INIT_WORK(per_cpu_ptr(works, orig), func);
+ func(per_cpu_ptr(works, orig));
+ }
+
get_online_cpus();
for_each_online_cpu(cpu) {
struct work_struct *work = per_cpu_ptr(works, cpu);
+ if (cpu == orig)
+ continue;
INIT_WORK(work, func);
schedule_work_on(cpu, work);
}
- for_each_online_cpu(cpu)
- flush_work(per_cpu_ptr(works, cpu));
+ for_each_online_cpu(cpu) {
+ if (cpu != orig)
+ flush_work(per_cpu_ptr(works, cpu));
+ }
put_online_cpus();
free_percpu(works);
return 0;