diff --git a/arch/mips/include/asm/cpu.h b/arch/mips/include/asm/cpu.h
index 64b4b69d26f4..01d757c83201 100644
--- a/arch/mips/include/asm/cpu.h
+++ b/arch/mips/include/asm/cpu.h
@@ -82,10 +82,10 @@
 #define PRID_IMP_RM7000		0x2700
 #define PRID_IMP_NEVADA		0x2800		/* RM5260 ??? */
 #define PRID_IMP_RM9000		0x3400
-#define PRID_IMP_LOONGSON1	0x4200
+#define PRID_IMP_LOONGSON_32	0x4200  /* Loongson-1 */
 #define PRID_IMP_R5432		0x5400
 #define PRID_IMP_R5500		0x5500
-#define PRID_IMP_LOONGSON2	0x6300
+#define PRID_IMP_LOONGSON_64	0x6300  /* Loongson-2/3 */
 
 #define PRID_IMP_UNKNOWN	0xff00
 
diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index f4229544df10..34df5afa2d6f 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -734,7 +734,7 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c, unsigned int cpu)
 			     MIPS_CPU_LLSC;
 		c->tlbsize = 64;
 		break;
-	case PRID_IMP_LOONGSON2:
+	case PRID_IMP_LOONGSON_64:  /* Loongson-2/3 */
 		c->cputype = CPU_LOONGSON2;
 		__cpu_name[cpu] = "ICT Loongson-2";
 
@@ -753,7 +753,7 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c, unsigned int cpu)
 			     MIPS_CPU_32FPR;
 		c->tlbsize = 64;
 		break;
-	case PRID_IMP_LOONGSON1:
+	case PRID_IMP_LOONGSON_32:  /* Loongson-1 */
 		decode_configs(c);
 
 		c->cputype = CPU_LOONGSON1;