diff --git a/arch/loongarch/include/asm/irq.h b/arch/loongarch/include/asm/irq.h
index 3943647503a9..537add26daf4 100644
--- a/arch/loongarch/include/asm/irq.h
+++ b/arch/loongarch/include/asm/irq.h
@@ -48,7 +48,6 @@ void spurious_interrupt(void);
  */
 #define NR_VECTORS		256
 #define NR_LEGACY_VECTORS	16
-#define IRQ_MATRIX_BITS		NR_VECTORS
 
 #define AVEC_IRQ_SHIFT		4
 #define AVEC_IRQ_BIT		8
diff --git a/kernel/irq/matrix.c b/kernel/irq/matrix.c
index 0f79a4abea05..faafb43a4e61 100644
--- a/kernel/irq/matrix.c
+++ b/kernel/irq/matrix.c
@@ -39,7 +39,7 @@ struct irq_matrix {
 
 /**
  * irq_alloc_matrix - Allocate a irq_matrix structure and initialize it
- * @matrix_bits:	Number of matrix bits must be <= IRQ_MATRIX_BITS
+ * @matrix_bits:	Number of matrix bits
  * @alloc_start:	From which bit the allocation search starts
  * @alloc_end:		At which bit the allocation search ends, i.e first
  *			invalid bit