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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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52
include/linux/tracehook.h
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@ -425,58 +425,6 @@ static inline int tracehook_consider_fatal_signal(struct task_struct *task,
return (task_ptrace(task) & PT_PTRACED) != 0;
}
/**
* tracehook_force_sigpending - let tracing force signal_pending(current) on
*
* Called when recomputing our signal_pending() flag. Return nonzero
* to force the signal_pending() flag on, so that tracehook_get_signal()
* will be called before the next return to user mode.
*
* Called with @current->sighand->siglock held.
*/
static inline int tracehook_force_sigpending(void)
{
return 0;
}
/**
* tracehook_get_signal - deliver synthetic signal to traced task
* @task: @current
* @regs: task_pt_regs(@current)
* @info: details of synthetic signal
* @return_ka: sigaction for synthetic signal
*
* Return zero to check for a real pending signal normally.
* Return -1 after releasing the siglock to repeat the check.
* Return a signal number to induce an artificial signal delivery,
* setting *@info and *@return_ka to specify its details and behavior.
*
* The @return_ka->sa_handler value controls the disposition of the
* signal, no matter the signal number. For %SIG_DFL, the return value
* is a representative signal to indicate the behavior (e.g. %SIGTERM
* for death, %SIGQUIT for core dump, %SIGSTOP for job control stop,
* %SIGTSTP for stop unless in an orphaned pgrp), but the signal number
* reported will be @info->si_signo instead.
*
* Called with @task->sighand->siglock held, before dequeuing pending signals.
*/
static inline int tracehook_get_signal(struct task_struct *task,
struct pt_regs *regs,
siginfo_t *info,
struct k_sigaction *return_ka)
{
return 0;
}
/**
* tracehook_finish_jctl - report about return from job control stop
*
* This is called by do_signal_stop() after wakeup.
*/
static inline void tracehook_finish_jctl(void)
{
}
#define DEATH_REAP -1
#define DEATH_DELAYED_GROUP_LEADER -2