From b32b6ac6e5eefe80739d88305ca9b92e3b5ac444 Mon Sep 17 00:00:00 2001
From: Rob Norris <robn@despairlabs.com>
Date: Sat, 24 Aug 2024 21:01:04 +1000
Subject: [PATCH] config: remove HAVE_SIGNAL_STOP

Sponsored-by: https://despairlabs.com/sponsor/
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Tino Reichardt <milky-zfs@mcmilk.de>
Signed-off-by: Rob Norris <robn@despairlabs.com>
Closes #16479
---
 config/kernel-signal-stop.m4     | 21 ---------------------
 config/kernel.m4                 |  2 --
 module/os/linux/spl/spl-thread.c |  8 --------
 3 files changed, 31 deletions(-)
 delete mode 100644 config/kernel-signal-stop.m4

diff --git a/config/kernel-signal-stop.m4 b/config/kernel-signal-stop.m4
deleted file mode 100644
index 6cb86e7c4..000000000
--- a/config/kernel-signal-stop.m4
+++ /dev/null
@@ -1,21 +0,0 @@
-dnl #
-dnl # 4.4 API change
-dnl # Added kernel_signal_stop
-dnl #
-AC_DEFUN([ZFS_AC_KERNEL_SRC_SIGNAL_STOP], [
-	ZFS_LINUX_TEST_SRC([signal_stop], [
-		#include <linux/sched/signal.h>
-	],[
-		kernel_signal_stop();
-	])
-])
-
-AC_DEFUN([ZFS_AC_KERNEL_SIGNAL_STOP], [
-	AC_MSG_CHECKING([whether signal_stop() exists])
-	ZFS_LINUX_TEST_RESULT([signal_stop], [
-		AC_MSG_RESULT(yes)
-		AC_DEFINE(HAVE_SIGNAL_STOP, 1, [signal_stop() exists])
-	],[
-		AC_MSG_RESULT(no)
-	])
-])
diff --git a/config/kernel.m4 b/config/kernel.m4
index 60c983047..eb13e6684 100644
--- a/config/kernel.m4
+++ b/config/kernel.m4
@@ -111,7 +111,6 @@ AC_DEFUN([ZFS_AC_KERNEL_TEST_SRC], [
 	ZFS_AC_KERNEL_SRC_MKNOD
 	ZFS_AC_KERNEL_SRC_SYMLINK
 	ZFS_AC_KERNEL_SRC_BIO_MAX_SEGS
-	ZFS_AC_KERNEL_SRC_SIGNAL_STOP
 	ZFS_AC_KERNEL_SRC_SIGINFO
 	ZFS_AC_KERNEL_SRC_SYSFS
 	ZFS_AC_KERNEL_SRC_STANDALONE_LINUX_STDARG
@@ -226,7 +225,6 @@ AC_DEFUN([ZFS_AC_KERNEL_TEST_RESULT], [
 	ZFS_AC_KERNEL_MKNOD
 	ZFS_AC_KERNEL_SYMLINK
 	ZFS_AC_KERNEL_BIO_MAX_SEGS
-	ZFS_AC_KERNEL_SIGNAL_STOP
 	ZFS_AC_KERNEL_SIGINFO
 	ZFS_AC_KERNEL_SYSFS
 	ZFS_AC_KERNEL_STANDALONE_LINUX_STDARG
diff --git a/module/os/linux/spl/spl-thread.c b/module/os/linux/spl/spl-thread.c
index 6f261b4d8..80acd0201 100644
--- a/module/os/linux/spl/spl-thread.c
+++ b/module/os/linux/spl/spl-thread.c
@@ -175,17 +175,9 @@ issig(void)
 #else
 	if (dequeue_signal(task, &set, &__info) != 0) {
 #endif
-#ifdef HAVE_SIGNAL_STOP
 		spin_unlock_irq(&task->sighand->siglock);
 		kernel_signal_stop();
-#else
-		if (current->jobctl & JOBCTL_STOP_DEQUEUED)
-			set_special_state(TASK_STOPPED);
 
-		spin_unlock_irq(&current->sighand->siglock);
-
-		schedule();
-#endif
 		/*
 		 * Dequeued SIGSTOP/SIGTSTP.
 		 * Check if process has other singal pending.