S390: Platform specific includes in common files

src/code-stubs.h

Index: src/code-stubs.h
diff --git a/src/code-stubs.h b/src/code-stubs.h
index 199f24312173af5b1996987f402b845a415fa7f3..1cad14eefb8c460bcb1868d801773d45293efbc4 100644
--- a/src/code-stubs.h
+++ b/src/code-stubs.h
@@ -167,13 +167,24 @@ namespace internal {
 #define CODE_STUB_LIST_MIPS(V)
 #endif
 
+// List of code stubs only used on S390 platforms.
+#ifdef V8_TARGET_ARCH_S390
+#define CODE_STUB_LIST_S390(V) \
+  V(DirectCEntry)              \
+  V(StoreRegistersState)       \
+  V(RestoreRegistersState)
+#else
+#define CODE_STUB_LIST_S390(V)
+#endif
+
 // Combined list of code stubs.
 #define CODE_STUB_LIST(V)         \
   CODE_STUB_LIST_ALL_PLATFORMS(V) \
   CODE_STUB_LIST_ARM(V)           \
   CODE_STUB_LIST_ARM64(V)         \
   CODE_STUB_LIST_PPC(V)           \
-  CODE_STUB_LIST_MIPS(V)
+  CODE_STUB_LIST_MIPS(V)          \
+  CODE_STUB_LIST_S390(V)
 
 static const int kHasReturnedMinusZeroSentinel = 1;
 
@@ -593,6 +604,8 @@ class RuntimeCallHelper {
 #include "src/mips/code-stubs-mips.h"
 #elif V8_TARGET_ARCH_MIPS64
 #include "src/mips64/code-stubs-mips64.h"
+#elif V8_TARGET_ARCH_S390
+#include "src/s390/code-stubs-s390.h"
 #elif V8_TARGET_ARCH_X87
 #include "src/x87/code-stubs-x87.h"
 #else