diff --git a/kernel/idle.c b/kernel/idle.c
index 7baa462f902..aab4dbc2daa 100644
--- a/kernel/idle.c
+++ b/kernel/idle.c
@@ -77,7 +77,7 @@ static void sys_power_save_idle(void)
 #if (defined(CONFIG_SYS_POWER_LOW_POWER_STATE) || \
 	defined(CONFIG_SYS_POWER_DEEP_SLEEP))
 
-	_sys_pm_idle_exit_notify = 1;
+	_sys_pm_idle_exit_notify = 1U;
 
 	/*
 	 * Call the suspend hook function of the soc interface to allow
@@ -93,7 +93,7 @@ static void sys_power_save_idle(void)
 	 * the kernel's scheduling logic.
 	 */
 	if (_sys_soc_suspend(ticks) == SYS_PM_NOT_HANDLED) {
-		_sys_pm_idle_exit_notify = 0;
+		_sys_pm_idle_exit_notify = 0U;
 		k_cpu_idle();
 	}
 #else
diff --git a/kernel/int_latency_bench.c b/kernel/int_latency_bench.c
index 55e46c6b314..052d71ea917 100644
--- a/kernel/int_latency_bench.c
+++ b/kernel/int_latency_bench.c
@@ -55,7 +55,7 @@ void _int_latency_start(void)
 	/* when interrupts are not already locked, take time stamp */
 	if (!int_locked_timestamp && int_latency_bench_ready) {
 		int_locked_timestamp = k_cycle_get_32();
-		int_lock_unlock_nest = 0;
+		int_lock_unlock_nest = 0U;
 	}
 	int_lock_unlock_nest++;
 }
@@ -108,7 +108,7 @@ void _int_latency_stop(void)
 
 		/* interrupts are now enabled, get ready for next interrupt lock
 		 */
-		int_locked_timestamp = 0;
+		int_locked_timestamp = 0U;
 	}
 }
 
@@ -124,7 +124,7 @@ void int_latency_init(void)
 	u32_t timeToReadTime;
 	u32_t cacheWarming = NB_CACHE_WARMING_DRY_RUN;
 
-	int_latency_bench_ready = 1;
+	int_latency_bench_ready = 1U;
 
 	/*
 	 * measuring delay introduced by the interrupt latency benchmark few
@@ -157,7 +157,7 @@ void int_latency_init(void)
 
 		/* re-initialize globals to default values */
 		int_locked_latency_min = ULONG_MAX;
-		int_locked_latency_max = 0;
+		int_locked_latency_max = 0U;
 
 		cacheWarming--;
 	}
@@ -174,7 +174,7 @@ void int_latency_init(void)
  */
 void int_latency_show(void)
 {
-	u32_t intHandlerLatency = 0;
+	u32_t intHandlerLatency = 0U;
 
 	if (!int_latency_bench_ready) {
 		printk("error: int_latency_init() has not been invoked\n");
@@ -183,7 +183,7 @@ void int_latency_show(void)
 
 	if (int_locked_latency_min != ULONG_MAX) {
 		if (_hw_irq_to_c_handler_latency == ULONG_MAX) {
-			intHandlerLatency = 0;
+			intHandlerLatency = 0U;
 			printk(" Min latency from hw interrupt up to 'C' int. "
 			       "handler: "
 			       "not measured\n");
@@ -221,5 +221,5 @@ void int_latency_show(void)
 	 * disabled.
 	 */
 	int_locked_latency_min = ULONG_MAX;
-	int_locked_latency_max = 0;
+	int_locked_latency_max = 0U;
 }
diff --git a/kernel/mem_domain.c b/kernel/mem_domain.c
index 33f369a047c..8b6bb8cb292 100644
--- a/kernel/mem_domain.c
+++ b/kernel/mem_domain.c
@@ -33,7 +33,7 @@ static bool sane_partition(const struct k_mem_partition *part,
 		return false;
 	}
 
-	for (i = 0; i < num_parts; i++) {
+	for (i = 0U; i < num_parts; i++) {
 		bool cur_write, cur_exec;
 		u32_t cur_last;
 
@@ -87,7 +87,7 @@ void k_mem_domain_init(struct k_mem_domain *domain, u8_t num_parts,
 	if (num_parts) {
 		u32_t i;
 
-		for (i = 0; i < num_parts; i++) {
+		for (i = 0U; i < num_parts; i++) {
 			__ASSERT(parts[i] != NULL, "");
 			__ASSERT((parts[i]->start + parts[i]->size) >
 				 parts[i]->start, "");
diff --git a/kernel/mem_slab.c b/kernel/mem_slab.c
index f3274926ed1..615e049427f 100644
--- a/kernel/mem_slab.c
+++ b/kernel/mem_slab.c
@@ -37,7 +37,7 @@ static void create_free_list(struct k_mem_slab *slab)
 	slab->free_list = NULL;
 	p = slab->buffer;
 
-	for (j = 0; j < slab->num_blocks; j++) {
+	for (j = 0U; j < slab->num_blocks; j++) {
 		*(char **)p = slab->free_list;
 		slab->free_list = p;
 		p += slab->block_size;
diff --git a/kernel/timeout.c b/kernel/timeout.c
index 4ffae501c1a..b9a1158b819 100644
--- a/kernel/timeout.c
+++ b/kernel/timeout.c
@@ -210,7 +210,7 @@ void k_disable_sys_clock_always_on(void)
 
 s64_t z_tick_get(void)
 {
-	u64_t t = 0;
+	u64_t t = 0U;
 
 	LOCKED(&timeout_lock) {
 		t = curr_tick + z_clock_elapsed();