[PATCH 4/4] kill PF_STARTING

[Oleg Nesterov <oleg@redhat.com>]

Previously it was (ab)used by utrace. Then it was wrongly used by
the scheduler code.

Currently it is not used, kill it before it finds the new erroneous
user.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Tejun Heo <tj@kernel.org>
---
 include/linux/sched.h |    1 -
 kernel/fork.c         |    9 ---------
 2 files changed, 0 insertions(+), 10 deletions(-)

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 11fcafa..0657368 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1777,7 +1777,6 @@ extern void thread_group_times(struct task_struct *p, cputime_t *ut, cputime_t *
 /*
  * Per process flags
  */
-#define PF_STARTING	0x00000002	/* being created */
 #define PF_EXITING	0x00000004	/* getting shut down */
 #define PF_EXITPIDONE	0x00000008	/* pi exit done on shut down */
 #define PF_VCPU		0x00000010	/* I'm a virtual CPU */
diff --git a/kernel/fork.c b/kernel/fork.c
index 57ebebb..3aa9153 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1043,7 +1043,6 @@ static void copy_flags(unsigned long clone_flags, struct task_struct *p)
 
 	new_flags &= ~(PF_SUPERPRIV | PF_WQ_WORKER);
 	new_flags |= PF_FORKNOEXEC;
-	new_flags |= PF_STARTING;
 	p->flags = new_flags;
 }
 
@@ -1576,14 +1575,6 @@ long do_fork(unsigned long clone_flags,
 			get_task_struct(p);
 		}
 
-		/*
-		 * We set PF_STARTING at creation in case tracing wants to
-		 * use this to distinguish a fully live task from one that
-		 * hasn't finished SIGSTOP raising yet.  Now we clear it
-		 * and set the child going.
-		 */
-		p->flags &= ~PF_STARTING;
-
 		wake_up_new_task(p);
 
 		/* forking complete and child started to run, tell ptracer */
-- 
1.5.5.1