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ptrace: kill task_ptrace()

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task_ptrace(task) simply dereferences task->ptrace and isn't even used
consistently only adding confusion.  Kill it and directly access
->ptrace instead.

This doesn't introduce any behavior change.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
This commit is contained in:
Tejun Heo 2011-06-17 16:50:34 +02:00 • committed by Oleg Nesterov
parent 544b2c91a9
commit d21142ece4
5 changed files with 20 additions and 32 deletions
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8
kernel/exit.c
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@ -765,7 +765,7 @@ static void reparent_leader(struct task_struct *father, struct task_struct *p,
p->exit_signal = SIGCHLD;
/* If it has exited notify the new parent about this child's death. */
if (!task_ptrace(p) &&
if (!p->ptrace &&
p->exit_state == EXIT_ZOMBIE && thread_group_empty(p)) {
do_notify_parent(p, p->exit_signal);
if (task_detached(p)) {
@ -795,7 +795,7 @@ static void forget_original_parent(struct task_struct *father)
do {
t->real_parent = reaper;
if (t->parent == father) {
BUG_ON(task_ptrace(t));
BUG_ON(t->ptrace);
t->parent = t->real_parent;
}
if (t->pdeath_signal)
@ -1565,7 +1565,7 @@ static int wait_consider_task(struct wait_opts *wo, int ptrace,
* Notification and reaping will be cascaded to the real
* parent when the ptracer detaches.
*/
if (likely(!ptrace) && unlikely(task_ptrace(p))) {
if (likely(!ptrace) && unlikely(p->ptrace)) {
/* it will become visible, clear notask_error */
wo->notask_error = 0;
return 0;
@ -1608,7 +1608,7 @@ static int wait_consider_task(struct wait_opts *wo, int ptrace,
* own children, it should create a separate process which
* takes the role of real parent.
*/
if (likely(!ptrace) && task_ptrace(p) &&
if (likely(!ptrace) && p->ptrace &&
same_thread_group(p->parent, p->real_parent))
return 0;