1 files changed, 1 insertions, 4 deletions

diff --git a/arch/x86/kernel/cpu/perf_event_intel_uncore.c b/arch/x86/kernel/cpu/perf_event_intel_uncore.c
index 65bbbea38b9c..e009f3cedf89 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_uncore.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_uncore.c
@@ -2946,10 +2946,7 @@ again:
                  * extra registers. If we failed to take an extra
                  * register, try the alternative.
                  */
-                if (idx % 2)
-                        idx--;
-                else
-                        idx++;
+                idx ^= 1;
                 if (idx != reg1->idx % 6) {
                         if (idx == 2)
                                 config1 >>= 8;