Separate CAS/ADD RMWs
diff --git a/src/core/lib/support/sync_posix.c b/src/core/lib/support/sync_posix.c
index 3b7d780..16e7d6e 100644
--- a/src/core/lib/support/sync_posix.c
+++ b/src/core/lib/support/sync_posix.c
@@ -44,7 +44,8 @@
 
 #ifdef GPR_LOW_LEVEL_COUNTERS
 gpr_atm gpr_mu_locks = 0;
-gpr_atm gpr_counter_rmw = 0;
+gpr_atm gpr_counter_atm_cas = 0;
+gpr_atm gpr_counter_atm_add = 0;
 #endif
 
 void gpr_mu_init(gpr_mu* mu) { GPR_ASSERT(pthread_mutex_init(mu, NULL) == 0); }