kthread: remove comments about old _do_fork() helper

The old _do_fork() helper has been removed in favor of kernel_clone().
Here correct some comments which still contain _do_fork()

Link: https://lore.kernel.org/r/[email protected]
Cc: [email protected]
Cc: [email protected]
Acked-by: Christian Brauner <[email protected]>
Signed-off-by: Yanfei Xu <[email protected]>
Signed-off-by: Christian Brauner <[email protected]>

Author: Yanfei Xu

include/trace/events/sched.h

@@ -366,7 +366,7 @@ TRACE_EVENT(sched_process_wait,
 );
 
 /*
- * Tracepoint for do_fork:
+ * Tracepoint for kernel_clone:
  */
 TRACE_EVENT(sched_process_fork,
 

kernel/kthread.c

@@ -294,7 +294,7 @@ static int kthread(void *_create)
 	do_exit(ret);
 }
 
-/* called from do_fork() to get node information for about to be created task */
+/* called from kernel_clone() to get node information for about to be created task */
 int tsk_fork_get_node(struct task_struct *tsk)
 {
 #ifdef CONFIG_NUMA