diff --git a/arch/x86/core/acpi.c b/arch/x86/core/acpi.c
index d451b7ee506..240aa472d0e 100644
--- a/arch/x86/core/acpi.c
+++ b/arch/x86/core/acpi.c
@@ -147,7 +147,7 @@ struct acpi_cpu *z_acpi_get_cpu(int n)
 		if (entry->type == ACPI_MADT_ENTRY_CPU) {
 			struct acpi_cpu *cpu = (struct acpi_cpu *)entry;
 
-			if (cpu->flags & ACPI_CPU_FLAGS_ENABLED) {
+			if ((cpu->flags & ACPI_CPU_FLAGS_ENABLED) != 0) {
 				if (n == 0) {
 					return cpu;
 				}
diff --git a/arch/x86/core/early_serial.c b/arch/x86/core/early_serial.c
index 58613e25cce..aa3aacc99d6 100644
--- a/arch/x86/core/early_serial.c
+++ b/arch/x86/core/early_serial.c
@@ -110,7 +110,7 @@ void z_x86_early_serial_init(void)
 
 	early_serial_init_done = true;
 
-	if (suppressed_chars) {
+	if (suppressed_chars != 0U) {
 		printk("WARNING: %u chars lost before early serial init\n",
 		       suppressed_chars);
 	}
diff --git a/arch/x86/core/x86_mmu.c b/arch/x86/core/x86_mmu.c
index ec2c820fc84..ed598f4763c 100644
--- a/arch/x86/core/x86_mmu.c
+++ b/arch/x86/core/x86_mmu.c
@@ -518,7 +518,7 @@ static void print_entries(pentry_t entries_array[], uint8_t *base, int level,
 		uintptr_t virt =
 			(uintptr_t)base + (get_entry_scope(level) * i);
 
-		if (entry & MMU_P) {
+		if ((entry & MMU_P) != 0U) {
 			if (is_leaf(level, entry)) {
 				if (phys == virt) {
 					/* Identity mappings */
diff --git a/drivers/counter/counter_cmos.c b/drivers/counter/counter_cmos.c
index 0a23fc48822..f2006ff32ca 100644
--- a/drivers/counter/counter_cmos.c
+++ b/drivers/counter/counter_cmos.c
@@ -154,14 +154,14 @@ int get_value(const struct device *dev, uint32_t *ticks)
 	 * the HOUR_PM flag before we adjust for BCD.
 	 */
 
-	if (state.status_b & STATUS_B_24HR) {
+	if ((state.status_b & STATUS_B_24HR) != 0U) {
 		pm = false;
 	} else {
 		pm = ((state.hour & HOUR_PM) == HOUR_PM);
 		state.hour &= ~HOUR_PM;
 	}
 
-	if (!(state.status_b & STATUS_B_BIN)) {
+	if ((state.status_b & STATUS_B_BIN) == 0U) {
 		uint8_t *cp = (uint8_t *) &state;
 		int i;
 
diff --git a/kernel/device.c b/kernel/device.c
index 4b6c6d8564b..d8456d9b3ab 100644
--- a/kernel/device.c
+++ b/kernel/device.c
@@ -112,7 +112,7 @@ const struct device *z_impl_device_get_binding(const char *name)
 	/* A null string identifies no device.  So does an empty
 	 * string.
 	 */
-	if ((name == NULL) || (*name == 0U)) {
+	if ((name == NULL) || (name[0] == '\0')) {
 		return NULL;
 	}