kernel: remove checking for TIF_NOTIFY_SIGNAL (e296dc49) · Commits · 戴 / test

include/linux/entry-common.h

+0 −4

Original line number	Diff line number	Diff line
		@@ -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()
		*/

+0 −2

Original line number	Diff line number	Diff line
		@@ -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);
		}

+0 −4

Original line number	Diff line number	Diff line
		@@ -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> */

+0 −2

Original line number	Diff line number	Diff line
		@@ -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;