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signal: remove three noop tracehooks

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Remove the following three noop tracehooks in signals.c.

* tracehook_force_sigpending()
* tracehook_get_signal()
* tracehook_finish_jctl()

The code area is about to be updated and these hooks don't do anything
other than obfuscating the logic.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
This commit is contained in:
Tejun Heo
2011-06-02 11:14:00 +02:00
committed by Oleg Nesterov
parent 62c124ff3b
commit dd1d677269
2 changed files with 14 additions and 82 deletions
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44
kernel/signal.c
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@@ -150,9 +150,7 @@ void recalc_sigpending_and_wake(struct task_struct *t)
void recalc_sigpending(void)
{
if (unlikely(tracehook_force_sigpending()))
set_thread_flag(TIF_SIGPENDING);
else if (!recalc_sigpending_tsk(current) && !freezing(current))
if (!recalc_sigpending_tsk(current) && !freezing(current))
clear_thread_flag(TIF_SIGPENDING);
}
@@ -2005,8 +2003,6 @@ retry:
spin_unlock_irq(&current->sighand->siglock);
tracehook_finish_jctl();
return 1;
}
@@ -2109,37 +2105,25 @@ relock:
for (;;) {
struct k_sigaction *ka;
/*
* Tracing can induce an artificial signal and choose sigaction.
* The return value in @signr determines the default action,
* but @info->si_signo is the signal number we will report.
*/
signr = tracehook_get_signal(current, regs, info, return_ka);
if (unlikely(signr < 0))
if (unlikely(current->jobctl & JOBCTL_STOP_PENDING) &&
do_signal_stop(0))
goto relock;
if (unlikely(signr != 0))
ka = return_ka;
else {
if (unlikely(current->jobctl & JOBCTL_STOP_PENDING) &&
do_signal_stop(0))
goto relock;
signr = dequeue_signal(current, &current->blocked,
info);
signr = dequeue_signal(current, &current->blocked, info);
if (!signr)
break; /* will return 0 */
if (signr != SIGKILL) {
signr = ptrace_signal(signr, info,
regs, cookie);
if (!signr)
break; /* will return 0 */
if (signr != SIGKILL) {
signr = ptrace_signal(signr, info,
regs, cookie);
if (!signr)
continue;
}
ka = &sighand->action[signr-1];
continue;
}
ka = &sighand->action[signr-1];
/* Trace actually delivered signals. */
trace_signal_deliver(signr, info, ka);