From: Ivan Maidanski <ivmai@mail.ru>
Date: Wed, 16 Nov 2016 07:34:08 +0000 (+0300)
Subject: Eliminate 'function result not used' code defect in GC_mark_local
X-Git-Tag: v7.6.2~325
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=0674677eafccc0e57180d66a3a3e598bbd05c914;p=gc

Eliminate 'function result not used' code defect in GC_mark_local

* mark.c (GC_mark_local): Explicitly cast AO_compare_and_swap result to
void (to outline that the result is unused intentionally).
---

diff --git a/mark.c b/mark.c
index 81360307..20307fb6 100644
--- a/mark.c
+++ b/mark.c
@@ -1079,9 +1079,9 @@ STATIC void GC_mark_local(mse *local_mark_stack, int id)
         if ((word)my_first_nonempty < (word)global_first_nonempty) {
             my_first_nonempty = global_first_nonempty;
         } else if ((word)global_first_nonempty < (word)my_first_nonempty) {
-            AO_compare_and_swap(&GC_first_nonempty,
-                                (AO_t) global_first_nonempty,
-                                (AO_t) my_first_nonempty);
+            (void)AO_compare_and_swap(&GC_first_nonempty,
+                                      (AO_t)global_first_nonempty,
+                                      (AO_t)my_first_nonempty);
             /* If this fails, we just go ahead, without updating        */
             /* GC_first_nonempty.                                       */
         }