diff --git a/arch/s390/include/asm/cpu_mcf.h b/arch/s390/include/asm/cpu_mcf.h
index f87a4788c19c..387e169597b0 100644
--- a/arch/s390/include/asm/cpu_mcf.h
+++ b/arch/s390/include/asm/cpu_mcf.h
@@ -105,8 +105,6 @@ static inline int stccm_avail(void)
 	return test_facility(142);
 }
 
-size_t cpum_cf_ctrset_size(enum cpumf_ctr_set ctrset,
-			   struct cpumf_ctr_info *info);
 int cfset_online_cpu(unsigned int cpu);
 int cfset_offline_cpu(unsigned int cpu);
 #endif /* _ASM_S390_CPU_MCF_H */
diff --git a/arch/s390/kernel/perf_cpum_cf.c b/arch/s390/kernel/perf_cpum_cf.c
index e58e49488ad9..936eda2e5c05 100644
--- a/arch/s390/kernel/perf_cpum_cf.c
+++ b/arch/s390/kernel/perf_cpum_cf.c
@@ -112,6 +112,53 @@ static void cfdiag_trailer(struct cf_trailer_entry *te)
 	te->timestamp = get_tod_clock_fast();
 }
 
+/*
+ * Return the maximum possible counter set size (in number of 8 byte counters)
+ * depending on type and model number.
+ */
+static size_t cpum_cf_ctrset_size(enum cpumf_ctr_set ctrset,
+				  struct cpumf_ctr_info *info)
+{
+	size_t ctrset_size = 0;
+
+	switch (ctrset) {
+	case CPUMF_CTR_SET_BASIC:
+		if (info->cfvn >= 1)
+			ctrset_size = 6;
+		break;
+	case CPUMF_CTR_SET_USER:
+		if (info->cfvn == 1)
+			ctrset_size = 6;
+		else if (info->cfvn >= 3)
+			ctrset_size = 2;
+		break;
+	case CPUMF_CTR_SET_CRYPTO:
+		if (info->csvn >= 1 && info->csvn <= 5)
+			ctrset_size = 16;
+		else if (info->csvn == 6 || info->csvn == 7)
+			ctrset_size = 20;
+		break;
+	case CPUMF_CTR_SET_EXT:
+		if (info->csvn == 1)
+			ctrset_size = 32;
+		else if (info->csvn == 2)
+			ctrset_size = 48;
+		else if (info->csvn >= 3 && info->csvn <= 5)
+			ctrset_size = 128;
+		else if (info->csvn == 6 || info->csvn == 7)
+			ctrset_size = 160;
+		break;
+	case CPUMF_CTR_SET_MT_DIAG:
+		if (info->csvn > 3)
+			ctrset_size = 48;
+		break;
+	case CPUMF_CTR_SET_MAX:
+		break;
+	}
+
+	return ctrset_size;
+}
+
 /* Read a counter set. The counter set number determines the counter set and
  * the CPUM-CF first and second version number determine the number of
  * available counters in each counter set.
diff --git a/arch/s390/kernel/perf_cpum_cf_common.c b/arch/s390/kernel/perf_cpum_cf_common.c
index 8ee48672233f..4824e3461b5b 100644
--- a/arch/s390/kernel/perf_cpum_cf_common.c
+++ b/arch/s390/kernel/perf_cpum_cf_common.c
@@ -156,52 +156,6 @@ static int cpum_cf_offline_cpu(unsigned int cpu)
 	return cpum_cf_setup(cpu, PMC_RELEASE);
 }
 
-/* Return the maximum possible counter set size (in number of 8 byte counters)
- * depending on type and model number.
- */
-size_t cpum_cf_ctrset_size(enum cpumf_ctr_set ctrset,
-			   struct cpumf_ctr_info *info)
-{
-	size_t ctrset_size = 0;
-
-	switch (ctrset) {
-	case CPUMF_CTR_SET_BASIC:
-		if (info->cfvn >= 1)
-			ctrset_size = 6;
-		break;
-	case CPUMF_CTR_SET_USER:
-		if (info->cfvn == 1)
-			ctrset_size = 6;
-		else if (info->cfvn >= 3)
-			ctrset_size = 2;
-		break;
-	case CPUMF_CTR_SET_CRYPTO:
-		if (info->csvn >= 1 && info->csvn <= 5)
-			ctrset_size = 16;
-		else if (info->csvn == 6 || info->csvn == 7)
-			ctrset_size = 20;
-		break;
-	case CPUMF_CTR_SET_EXT:
-		if (info->csvn == 1)
-			ctrset_size = 32;
-		else if (info->csvn == 2)
-			ctrset_size = 48;
-		else if (info->csvn >= 3 && info->csvn <= 5)
-			ctrset_size = 128;
-		else if (info->csvn == 6 || info->csvn == 7)
-			ctrset_size = 160;
-		break;
-	case CPUMF_CTR_SET_MT_DIAG:
-		if (info->csvn > 3)
-			ctrset_size = 48;
-		break;
-	case CPUMF_CTR_SET_MAX:
-		break;
-	}
-
-	return ctrset_size;
-}
-
 static int __init cpum_cf_init(void)
 {
 	int rc;