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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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14
kernel/signal.c
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@ -1592,7 +1592,7 @@ int do_notify_parent(struct task_struct *tsk, int sig)
/* do_notify_parent_cldstop should have been called instead. */
BUG_ON(task_is_stopped_or_traced(tsk));
BUG_ON(!task_ptrace(tsk) &&
BUG_ON(!tsk->ptrace &&
(tsk->group_leader != tsk || !thread_group_empty(tsk)));
info.si_signo = sig;
@ -1631,7 +1631,7 @@ int do_notify_parent(struct task_struct *tsk, int sig)
psig = tsk->parent->sighand;
spin_lock_irqsave(&psig->siglock, flags);
if (!task_ptrace(tsk) && sig == SIGCHLD &&
if (!tsk->ptrace && sig == SIGCHLD &&
(psig->action[SIGCHLD-1].sa.sa_handler == SIG_IGN ||
(psig->action[SIGCHLD-1].sa.sa_flags & SA_NOCLDWAIT))) {
/*
@ -1731,7 +1731,7 @@ static void do_notify_parent_cldstop(struct task_struct *tsk,
static inline int may_ptrace_stop(void)
{
if (!likely(task_ptrace(current)))
if (!likely(current->ptrace))
return 0;
/*
* Are we in the middle of do_coredump?
@ -1989,7 +1989,7 @@ static bool do_signal_stop(int signr)
if (!(sig->flags & SIGNAL_STOP_STOPPED))
sig->group_exit_code = signr;
else
WARN_ON_ONCE(!task_ptrace(current));
WARN_ON_ONCE(!current->ptrace);
sig->group_stop_count = 0;
@ -2014,7 +2014,7 @@ static bool do_signal_stop(int signr)
}
}
if (likely(!task_ptrace(current))) {
if (likely(!current->ptrace)) {
int notify = 0;
/*
@ -2093,7 +2093,7 @@ static void do_jobctl_trap(void)
static int ptrace_signal(int signr, siginfo_t *info,
struct pt_regs *regs, void *cookie)
{
if (!task_ptrace(current))
if (!current->ptrace)
return signr;
ptrace_signal_deliver(regs, cookie);
@ -2179,7 +2179,7 @@ relock:
do_notify_parent_cldstop(current, false, why);
leader = current->group_leader;
if (task_ptrace(leader) && !real_parent_is_ptracer(leader))
if (leader->ptrace && !real_parent_is_ptracer(leader))
do_notify_parent_cldstop(leader, true, why);
read_unlock(&tasklist_lock);