kill PF_STARTING

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>

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 64bf566a75a70aba747fd2fb19a4eab3d125bca3..dcacb266494cb242b5bd254019d6155917e70ca9 100644 (file)
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1756,7 +1756,6 @@ 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 82418abe84adb07f3932545ceb9b79d1b4ce9a4d..8104ace81678ea6e4790e7365d2e75908a4139a4 100644 (file)
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1026,7 +1026,6 @@ 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;
        clear_freeze_flag(p);
 }
@@ -1563,15 +1562,6 @@ long do_fork(unsigned long clone_flags,
                }
 
                audit_finish_fork(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 */