From f50a7052f5e70ee7a6a5e2ed08660994dc3df2a5 Mon Sep 17 00:00:00 2001
From: Jens Axboe
Date: Fri, 9 Oct 2020 15:44:37 -0600
Subject: sparc: add support for TIF_NOTIFY_SIGNAL

Wire up TIF_NOTIFY_SIGNAL handling for sparc.

Cc: sparclinux@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 arch/sparc/include/asm/thread_info_32.h | 4 +++-
 arch/sparc/include/asm/thread_info_64.h | 6 ++++--
 arch/sparc/kernel/signal_32.c           | 2 +-
 arch/sparc/kernel/signal_64.c           | 2 +-
 4 files changed, 9 insertions(+), 5 deletions(-)

(limited to 'arch/sparc')

diff --git a/arch/sparc/include/asm/thread_info_32.h b/arch/sparc/include/asm/thread_info_32.h
index 548b366165dd..45b4955b253f 100644
--- a/arch/sparc/include/asm/thread_info_32.h
+++ b/arch/sparc/include/asm/thread_info_32.h
@@ -104,6 +104,7 @@ register struct thread_info *current_thread_info_reg asm("g6");
 #define TIF_SIGPENDING		2	/* signal pending */
 #define TIF_NEED_RESCHED	3	/* rescheduling necessary */
 #define TIF_RESTORE_SIGMASK	4	/* restore signal mask in do_signal() */
+#define TIF_NOTIFY_SIGNAL	5	/* signal notifications exist */
 #define TIF_USEDFPU		8	/* FPU was used by this task
 					 * this quantum (SMP) */
 #define TIF_POLLING_NRFLAG	9	/* true if poll_idle() is polling
@@ -115,11 +116,12 @@ register struct thread_info *current_thread_info_reg asm("g6");
 #define _TIF_NOTIFY_RESUME	(1<<TIF_NOTIFY_RESUME)
 #define _TIF_SIGPENDING		(1<<TIF_SIGPENDING)
 #define _TIF_NEED_RESCHED	(1<<TIF_NEED_RESCHED)
+#define _TIF_NOTIFY_SIGNAL	(1<<TIF_NOTIFY_SIGNAL)
 #define _TIF_USEDFPU		(1<<TIF_USEDFPU)
 #define _TIF_POLLING_NRFLAG	(1<<TIF_POLLING_NRFLAG)
 
 #define _TIF_DO_NOTIFY_RESUME_MASK	(_TIF_NOTIFY_RESUME | \
-					 _TIF_SIGPENDING)
+					 _TIF_SIGPENDING | _TIF_NOTIFY_SIGNAL)
 
 #define is_32bit_task()	(1)
 
diff --git a/arch/sparc/include/asm/thread_info_64.h b/arch/sparc/include/asm/thread_info_64.h
index 20255471e653..42cd4cd3892e 100644
--- a/arch/sparc/include/asm/thread_info_64.h
+++ b/arch/sparc/include/asm/thread_info_64.h
@@ -180,7 +180,7 @@ extern struct thread_info *current_thread_info(void);
 #define TIF_NOTIFY_RESUME	1	/* callback before returning to user */
 #define TIF_SIGPENDING		2	/* signal pending */
 #define TIF_NEED_RESCHED	3	/* rescheduling necessary */
-/* flag bit 4 is available */
+#define TIF_NOTIFY_SIGNAL	4	/* signal notifications exist */
 #define TIF_UNALIGNED		5	/* allowed to do unaligned accesses */
 #define TIF_UPROBE		6	/* breakpointed or singlestepped */
 #define TIF_32BIT		7	/* 32-bit binary */
@@ -200,6 +200,7 @@ extern struct thread_info *current_thread_info(void);
 #define _TIF_NOTIFY_RESUME	(1<<TIF_NOTIFY_RESUME)
 #define _TIF_SIGPENDING		(1<<TIF_SIGPENDING)
 #define _TIF_NEED_RESCHED	(1<<TIF_NEED_RESCHED)
+#define _TIF_NOTIFY_SIGNAL	(1<<TIF_NOTIFY_SIGNAL)
 #define _TIF_UNALIGNED		(1<<TIF_UNALIGNED)
 #define _TIF_UPROBE		(1<<TIF_UPROBE)
 #define _TIF_32BIT		(1<<TIF_32BIT)
@@ -213,7 +214,8 @@ extern struct thread_info *current_thread_info(void);
 				 _TIF_DO_NOTIFY_RESUME_MASK | \
 				 _TIF_NEED_RESCHED)
 #define _TIF_DO_NOTIFY_RESUME_MASK	(_TIF_NOTIFY_RESUME | \
-					 _TIF_SIGPENDING | _TIF_UPROBE)
+					 _TIF_SIGPENDING | _TIF_UPROBE | \
+					 _TIF_NOTIFY_SIGNAL)
 
 #define is_32bit_task()	(test_thread_flag(TIF_32BIT))
 
diff --git a/arch/sparc/kernel/signal_32.c b/arch/sparc/kernel/signal_32.c
index 741d0701003a..11cf2281b581 100644
--- a/arch/sparc/kernel/signal_32.c
+++ b/arch/sparc/kernel/signal_32.c
@@ -521,7 +521,7 @@ static void do_signal(struct pt_regs *regs, unsigned long orig_i0)
 void do_notify_resume(struct pt_regs *regs, unsigned long orig_i0,
 		      unsigned long thread_info_flags)
 {
-	if (thread_info_flags & _TIF_SIGPENDING)
+	if (thread_info_flags & (_TIF_SIGPENDING | _TIF_NOTIFY_SIGNAL))
 		do_signal(regs, orig_i0);
 	if (thread_info_flags & _TIF_NOTIFY_RESUME)
 		tracehook_notify_resume(regs);
diff --git a/arch/sparc/kernel/signal_64.c b/arch/sparc/kernel/signal_64.c
index f7ef7edcd5c1..a0eec62c825d 100644
--- a/arch/sparc/kernel/signal_64.c
+++ b/arch/sparc/kernel/signal_64.c
@@ -549,7 +549,7 @@ void do_notify_resume(struct pt_regs *regs, unsigned long orig_i0, unsigned long
 	user_exit();
 	if (thread_info_flags & _TIF_UPROBE)
 		uprobe_notify_resume(regs);
-	if (thread_info_flags & _TIF_SIGPENDING)
+	if (thread_info_flags & (_TIF_SIGPENDING | _TIF_NOTIFY_SIGNAL))
 		do_signal(regs, orig_i0);
 	if (thread_info_flags & _TIF_NOTIFY_RESUME)
 		tracehook_notify_resume(regs);
-- 
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