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authorTejun Heo2011-06-02 11:14:00 +0200
committerOleg Nesterov2011-06-04 18:17:11 +0200
commitdd1d6772692316fe35094085c5e4d9a370ad3462 (patch)
treed6f2743d96b93ded07d35a0af2cafa6056bfdc74 /kernel/signal.c
parentptrace: use bit_waitqueue for TRAPPING instead of wait_chldexit (diff)
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signal: remove three noop tracehooks
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>
Diffstat (limited to 'kernel/signal.c')
-rw-r--r--kernel/signal.c44
1 files changed, 14 insertions, 30 deletions
diff --git a/kernel/signal.c b/kernel/signal.c
index 172a4c79f12c..c99b8b5c0be7 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -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)
+ break; /* will return 0 */
- if (signr != SIGKILL) {
- signr = ptrace_signal(signr, info,
- regs, cookie);
- if (!signr)
- continue;
- }
-
- ka = &sighand->action[signr-1];
+ if (signr != SIGKILL) {
+ signr = ptrace_signal(signr, info,
+ regs, cookie);
+ if (!signr)
+ continue;
}
+ ka = &sighand->action[signr-1];
+
/* Trace actually delivered signals. */
trace_signal_deliver(signr, info, ka);