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ptrace: remove silly wait_trap variable from ptrace_attach() 

Remove local variable wait_trap which determines whether to wait for
!TRAPPING or not and simply wait for it if attach was successful.

-v2: Oleg pointed out wait should happen iff attach was successful.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
This commit is contained in:
Tejun Heo 2011-06-02 11:13:59 +02:00 committed by Oleg Nesterov
parent 23c79d31a3
commit 0b1007c357
1 changed files with 1 additions and 3 deletions
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4
kernel/ptrace.c
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@ -184,7 +184,6 @@ bool ptrace_may_access(struct task_struct *task, unsigned int mode)
static int ptrace_attach(struct task_struct *task)
{
bool wait_trap = false;
int retval;
audit_ptrace(task);
@ -246,7 +245,6 @@ static int ptrace_attach(struct task_struct *task)
if (task_is_stopped(task)) {
task->group_stop |= GROUP_STOP_PENDING | GROUP_STOP_TRAPPING;
signal_wake_up(task, 1);
wait_trap = true;
}
spin_unlock(&task->sighand->siglock);
@ -257,7 +255,7 @@ unlock_tasklist:
unlock_creds:
mutex_unlock(&task->signal->cred_guard_mutex);
out:
if (wait_trap)
if (!retval)
wait_event(current->signal->wait_chldexit,
!(task->group_stop & GROUP_STOP_TRAPPING));
return retval;