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5042 stop using deprecated atomic functions
@@ -276,11 +276,11 @@
                 if (!(lck & ZULU_CTX_LOCK)) {
                         uint64_t old_lck, new_lck;
 
                         new_lck = lck | ZULU_CTX_LOCK;
 
-                        old_lck = cas64(plck, lck, new_lck);
+                        old_lck = atomic_cas_64(plck, lck, new_lck);
 
                         if (old_lck == lck) {
                                 /*
                                  * success
                                  */