2 files changed, 10 insertions, 0 deletions

diff --git a/tools/perf/bench/mem-memcpy.c b/tools/perf/bench/mem-memcpy.c
index 5ce71d3b72cf..e622c3e96efc 100644
--- a/tools/perf/bench/mem-memcpy.c
+++ b/tools/perf/bench/mem-memcpy.c
@@ -189,6 +189,11 @@ int bench_mem_memcpy(int argc, const char **argv,
         argc = parse_options(argc, argv, options,
                              bench_mem_memcpy_usage, 0);
 
+        if (no_prefault && only_prefault) {
+                fprintf(stderr, "Invalid options: -o and -n are mutually exclusive\n");
+                return 1;
+        }
+
         if (use_cycle)
                 init_cycle();
 
diff --git a/tools/perf/bench/mem-memset.c b/tools/perf/bench/mem-memset.c
index 9af79d2b18e5..2a65468619f0 100644
--- a/tools/perf/bench/mem-memset.c
+++ b/tools/perf/bench/mem-memset.c
@@ -181,6 +181,11 @@ int bench_mem_memset(int argc, const char **argv,
         argc = parse_options(argc, argv, options,
                              bench_mem_memset_usage, 0);
 
+        if (no_prefault && only_prefault) {
+                fprintf(stderr, "Invalid options: -o and -n are mutually exclusive\n");
+                return 1;
+        }
+
         if (use_cycle)
                 init_cycle();