arc: add support for TIF_NOTIFY_SIGNAL (53855e12) · Commits · 戴 / test

arch/arc/include/asm/thread_info.h

+3 −1

Original line number	Diff line number	Diff line
		@@ -79,6 +79,7 @@ static inline __attribute_const__ struct thread_info *current_thread_info(void)
		#define TIF_SIGPENDING 2 /* signal pending */
		#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
		#define TIF_SYSCALL_AUDIT 4 /* syscall auditing active */
		#define TIF_NOTIFY_SIGNAL 5 /* signal notifications exist */
		#define TIF_SYSCALL_TRACE 15 /* syscall trace active */

		/* true if poll_idle() is polling TIF_NEED_RESCHED */
		@@ -89,11 +90,12 @@ static inline __attribute_const__ struct thread_info *current_thread_info(void)
		#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
		#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
		#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
		#define _TIF_NOTIFY_SIGNAL (1<<TIF_NOTIFY_SIGNAL)
		#define _TIF_MEMDIE (1<<TIF_MEMDIE)

		/* work to do on interrupt/exception return */
		#define _TIF_WORK_MASK (_TIF_NEED_RESCHED \| _TIF_SIGPENDING \| \
		_TIF_NOTIFY_RESUME)
		_TIF_NOTIFY_RESUME \| _TIF_NOTIFY_SIGNAL)

		/*
		* _TIF_ALLWORK_MASK includes SYSCALL_TRACE, but we don't need it.

+2 −1

Original line number	Diff line number	Diff line
		@@ -307,7 +307,8 @@ resume_user_mode_begin:
		mov r0, sp ; pt_regs for arg to do_signal()/do_notify_resume()

		GET_CURR_THR_INFO_FLAGS r9
		bbit0 r9, TIF_SIGPENDING, .Lchk_notify_resume
		and.f 0, r9, TIF_SIGPENDING\|TIF_NOTIFY_SIGNAL
		bz .Lchk_notify_resume

		; Normal Trap/IRQ entry only saves Scratch (caller-saved) regs
		; in pt_reg since the "C" ABI (kernel code) will automatically

+1 −1

Original line number	Diff line number	Diff line
		@@ -362,7 +362,7 @@ void do_signal(struct pt_regs *regs)

		restart_scall = in_syscall(regs) && syscall_restartable(regs);

		if (get_signal(&ksig)) {
		if (test_thread_flag(TIF_SIGPENDING) && get_signal(&ksig)) {
		if (restart_scall) {
		arc_restart_syscall(&ksig.ka, regs);
		syscall_wont_restart(regs); /* No more restarts */