[repost] sched: export sched_set/getaffinity to modules

Commit Message

Sridhar Samudrala July 26, 2010, 5:51 p.m. UTC

None

Patch

diff --git a/include/linux/kthread.h b/include/linux/kthread.h
index aabc8a1..634eaf7 100644
--- a/include/linux/kthread.h
+++ b/include/linux/kthread.h
@@ -9,6 +9,11 @@  struct task_struct *kthread_create(int (*threadfn)(void *data),
 				   const char namefmt[], ...)
 	__attribute__((format(printf, 3, 4)));
 
+struct task_struct *kthread_clone(int (*threadfn)(void *data),
+				  void *data,
+				  const char namefmt[], ...)
+	__attribute__((format(printf, 3, 4)));
+
 /**
  * kthread_run - create and wake a thread.
  * @threadfn: the function to run until signal_pending(current).
diff --git a/kernel/kthread.c b/kernel/kthread.c
index 83911c7..806dae5 100644
--- a/kernel/kthread.c
+++ b/kernel/kthread.c
@@ -149,6 +149,38 @@  struct task_struct *kthread_create(int (*threadfn)(void *data),
 }
 EXPORT_SYMBOL(kthread_create);
 
+struct task_struct *kthread_clone(int (*threadfn)(void *data),
+				  void *data,
+				  const char namefmt[],
+				  ...)
+{
+	struct kthread_create_info create;
+	int pid;
+
+	create.threadfn = threadfn;
+	create.data = data;
+	init_completion(&create.done);
+	INIT_LIST_HEAD(&create.list);
+
+	pid = kernel_thread(kthread, &create, CLONE_FS);
+	if (pid < 0) {
+		create.result = ERR_PTR(pid);
+		complete(&create.done);
+	}
+	wait_for_completion(&create.done);
+
+	if (!IS_ERR(create.result)) {
+		va_list args;
+		va_start(args, namefmt);
+		vsnprintf(create.result->comm, sizeof(create.result->comm),
+			  namefmt, args);
+		va_end(args);
+	}
+
+	return create.result;
+}
+EXPORT_SYMBOL(kthread_clone);
+
 /**
  * kthread_bind - bind a just-created kthread to a cpu.
  * @p: thread created by kthread_create().