kernel: Explicitly ignoring _Swap return

Ignoring _Swap return where there is no treatment or nothing to do.

Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>

arch/arm/core/thread_abort.c

@@ -41,7 +41,7 @@ void _impl_k_thread_abort(k_tid_t thread)
 
 	if (_current == thread) {
 		if ((SCB->ICSR & SCB_ICSR_VECTACTIVE_Msk) == 0) {
-			_Swap(key);
+			(void)_Swap(key);
 			CODE_UNREACHABLE;
 		} else {
 			SCB->ICSR |= SCB_ICSR_PENDSVSET_Msk;

arch/posix/core/posix_core.c

@@ -511,7 +511,7 @@ void _impl_k_thread_abort(k_tid_t thread)
 			thread_idx,
 			__func__);
 
-		_Swap(key);
+		(void)_Swap(key);
 		CODE_UNREACHABLE; /* LCOV_EXCL_LINE */
 	}
 

arch/x86/core/irq_manage.c

@@ -95,7 +95,7 @@ void _arch_isr_direct_footer(int swap)
 			:
 			: "memory"
 			);
-		_Swap(flags);
+		(void)_Swap(flags);
 	}
 }
 

boards/posix/native_posix/irq_handler.c

@@ -112,7 +112,7 @@ void posix_irq_handler(void)
 		&& (hw_irq_ctrl_get_cur_prio() == 256)
 		&& (_kernel.ready_q.cache != _current)) {
 
-		_Swap(irq_lock);
+		(void)_Swap(irq_lock);
 	}
 }
 

kernel/init.c

@@ -387,7 +387,7 @@ static void switch_to_main_thread(void)
 	 * will never be rescheduled in.
 	 */
 
-	_Swap(irq_lock());
+	(void)_Swap(irq_lock());
 #endif
 }
 #endif /* CONFIG_MULTITHREDING */

kernel/sched.c

@@ -789,10 +789,10 @@ void _impl_k_yield(void)
 	}
 
 #ifdef CONFIG_SMP
-	_Swap(irq_lock());
+	(void)_Swap(irq_lock());
 #else
 	if (_get_next_ready_thread() != _current) {
-		_Swap(irq_lock());
+		(void)_Swap(irq_lock());
 	}
 #endif
 }
@@ -827,7 +827,7 @@ void _impl_k_sleep(s32_t duration)
 	_remove_thread_from_ready_q(_current);
 	_add_thread_timeout(_current, NULL, ticks);
 
-	_Swap(key);
+	(void)_Swap(key);
 #endif
 }
 

kernel/smp.c

@@ -86,7 +86,7 @@ static void smp_init_top(int key, void *arg)
 	_arch_curr_cpu()->current = &dummy_thread;
 	unsigned int k = irq_lock();
 	smp_timer_init();
-	_Swap(k);
+	(void)_Swap(k);
 
 	CODE_UNREACHABLE;
 }

kernel/thread.c

@@ -510,7 +510,7 @@ void _impl_k_thread_suspend(struct k_thread *thread)
 	sys_trace_thread_suspend(thread);
 
 	if (thread == _current) {
-		_Swap(key);
+		(void)_Swap(key);
 	} else {
 		irq_unlock(key);
 	}

kernel/thread_abort.c

@@ -41,7 +41,7 @@ void _impl_k_thread_abort(k_tid_t thread)
 		irq_unlock(key);
 	} else {
 		if (_current == thread) {
-			_Swap(key);
+			(void)_Swap(key);
 			CODE_UNREACHABLE;
 		}