Commit 53855e12 authored by Jens Axboe's avatar Jens Axboe
Browse files

arc: add support for TIF_NOTIFY_SIGNAL 



Wire up TIF_NOTIFY_SIGNAL handling for arc.

Cc: linux-snps-arc@lists.infradead.org
Acked-by: default avatarVineet Gupta <vgupta@synopsys.com>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 88f93de1

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.

arch/arc/kernel/entry.S

+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

arch/arc/kernel/signal.c

+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 */