1 files changed, 4 insertions, 4 deletions

diff --git a/arch/s390/oprofile/hwsampler.c b/arch/s390/oprofile/hwsampler.c
index 4552ce40c81a..f43c0e4282af 100644
--- a/arch/s390/oprofile/hwsampler.c
+++ b/arch/s390/oprofile/hwsampler.c
@@ -994,7 +994,7 @@ allocate_error:
  *
  * Returns 0 on success, !0 on failure.
  */
-int hwsampler_deallocate()
+int hwsampler_deallocate(void)
 {
         int rc;
 
@@ -1035,7 +1035,7 @@ unsigned long hwsampler_get_sample_overflow_count(unsigned int cpu)
         return cb->sample_overflow;
 }
 
-int hwsampler_setup()
+int hwsampler_setup(void)
 {
         int rc;
         int cpu;
@@ -1102,7 +1102,7 @@ setup_exit:
         return rc;
 }
 
-int hwsampler_shutdown()
+int hwsampler_shutdown(void)
 {
         int rc;
 
@@ -1203,7 +1203,7 @@ start_all_exit:
  *
  * Returns 0 on success, !0 on failure.
  */
-int hwsampler_stop_all()
+int hwsampler_stop_all(void)
 {
         int tmp_rc, rc, cpu;
         struct hws_cpu_buffer *cb;