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kernel: remove checking for TIF_NOTIFY_SIGNAL

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It's available everywhere now, no need to check or add dummy defines.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2020-10-09 16:04:39 -06:00
parent 98b89b649f
commit e296dc4996
4 changed files with 0 additions and 12 deletions
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4
include/linux/entry-common.h
View File

@ -37,10 +37,6 @@
# define _TIF_UPROBE (0)
#endif
#ifndef _TIF_NOTIFY_SIGNAL
# define _TIF_NOTIFY_SIGNAL (0)
#endif
/*
* TIF flags handled in syscall_enter_from_user_mode()
*/

2
include/linux/sched/signal.h
View File

@ -360,7 +360,6 @@ static inline int task_sigpending(struct task_struct *p)
static inline int signal_pending(struct task_struct *p)
{
#if defined(TIF_NOTIFY_SIGNAL)
/*
* TIF_NOTIFY_SIGNAL isn't really a signal, but it requires the same
* behavior in terms of ensuring that we break out of wait loops
@ -368,7 +367,6 @@ static inline int signal_pending(struct task_struct *p)
*/
if (unlikely(test_tsk_thread_flag(p, TIF_NOTIFY_SIGNAL)))
return 1;
#endif
return task_sigpending(p);
}

4
include/linux/tracehook.h
View File

@ -205,12 +205,10 @@ static inline void tracehook_notify_resume(struct pt_regs *regs)
*/
static inline void tracehook_notify_signal(void)
{
#if defined(TIF_NOTIFY_SIGNAL)
clear_thread_flag(TIF_NOTIFY_SIGNAL);
smp_mb__after_atomic();
if (current->task_works)
task_work_run();
#endif
}
/*
@ -218,11 +216,9 @@ static inline void tracehook_notify_signal(void)
*/
static inline void set_notify_signal(struct task_struct *task)
{
#if defined(TIF_NOTIFY_SIGNAL)
if (!test_and_set_tsk_thread_flag(task, TIF_NOTIFY_SIGNAL) &&
!wake_up_state(task, TASK_INTERRUPTIBLE))
kick_process(task);
#endif
}
#endif /* <linux/tracehook.h> */

2
kernel/signal.c
View File

@ -2535,14 +2535,12 @@ bool get_signal(struct ksignal *ksig)
* that the arch handlers don't all have to do it. If we get here
* without TIF_SIGPENDING, just exit after running signal work.
*/
#ifdef TIF_NOTIFY_SIGNAL
if (!IS_ENABLED(CONFIG_GENERIC_ENTRY)) {
if (test_thread_flag(TIF_NOTIFY_SIGNAL))
tracehook_notify_signal();
if (!task_sigpending(current))
return false;
}
#endif
if (unlikely(uprobe_deny_signal()))
return false;