Earlier versions of GCC do not support 256 byte cache lines on s390x

Closes facebook#4022
linux-on-ibm-z · Sep 23, 2021 · 57b45e3 · 57b45e3
1 parent 8d6670d
commit 57b45e3
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/port/port_posix.h b/port/port_posix.h
@@ -190,7 +190,11 @@ extern void InitOnce(OnceType* once, void (*initializer)());
 #define ALIGN_AS(n) /*empty*/
 #else
 #if defined(__s390__)
+#if defined(__GNUC__) && __GNUC__ < 6
+#define CACHE_LINE_SIZE 64U
+#else
 #define CACHE_LINE_SIZE 256U
+#endif
 #elif defined(__powerpc__) || defined(__aarch64__)
 #define CACHE_LINE_SIZE 128U
 #else