4 files changed, 21 insertions, 10 deletions
diff --git a/erts/emulator/sys/common/erl_mmap.c b/erts/emulator/sys/common/erl_mmap.c
index a5714f8325..bb930ff03b 100644
--- a/erts/emulator/sys/common/erl_mmap.c
+++ b/erts/emulator/sys/common/erl_mmap.c
@@ -21,6 +21,7 @@
 #  include "config.h"
 #endif
 
+#define ERTS_WANT_MEM_MAPPERS
 #include "sys.h"
 #include "erl_process.h"
 #include "erl_smp.h"
@@ -358,12 +359,11 @@ char* erts_literals_start;
 UWord erts_literals_size;
 #endif
 
-#ifdef ERTS_ALC_A_EXEC
+#ifdef ERTS_HAVE_EXEC_MMAPPER
 ErtsMemMapper erts_exec_mmapper;
 #endif
 
 
-
 #define ERTS_MMAP_SIZE_SC_SA_INC(SZ) 						\
     do {									\
 	mm->size.supercarrier.used.total += (SZ);			\
@@ -1878,7 +1878,7 @@ erts_mremap(ErtsMemMapper* mm,
 	    return NULL;
 	}
 
-#if ERTS_HAVE_OS_MREMAP || ERTS_HAVE_GENUINE_OS_MMAP
+#if defined(ERTS_HAVE_OS_MREMAP) || defined(ERTS_HAVE_GENUINE_OS_MMAP)
 	superaligned = (ERTS_MMAPFLG_SUPERALIGNED & flags);
 
 	if (superaligned) {
@@ -1898,7 +1898,7 @@ erts_mremap(ErtsMemMapper* mm,
 	    }
 	}
 
-#if ERTS_HAVE_GENUINE_OS_MMAP
+#ifdef ERTS_HAVE_GENUINE_OS_MMAP
 	if (asize < old_size
 	    && (!superaligned
 		|| ERTS_IS_SUPERALIGNED(ptr))) {
@@ -1913,7 +1913,7 @@ erts_mremap(ErtsMemMapper* mm,
 	    return ptr;
 	}
 #endif
-#if ERTS_HAVE_OS_MREMAP
+#ifdef ERTS_HAVE_OS_MREMAP
 	if (superaligned)
 	    return remap_move(mm, flags, new_ptr, old_size, sizep);
 	else {
diff --git a/erts/emulator/sys/common/erl_mmap.h b/erts/emulator/sys/common/erl_mmap.h
index 623b5188ac..2a07d93c8c 100644
--- a/erts/emulator/sys/common/erl_mmap.h
+++ b/erts/emulator/sys/common/erl_mmap.h
@@ -158,12 +158,23 @@ Eterm erts_mmap_info_options(ErtsMemMapper*,
 #  include "erl_alloc_types.h"
 
 extern ErtsMemMapper erts_dflt_mmapper;
-#  if defined(ARCH_64) && defined(ERTS_HAVE_OS_PHYSICAL_MEMORY_RESERVATION)
+
+# if defined(ERTS_HAVE_OS_PHYSICAL_MEMORY_RESERVATION)
+
+#  if defined(ARCH_64)
 extern ErtsMemMapper erts_literal_mmapper;
 #  endif
-#  ifdef ERTS_ALC_A_EXEC
+
+#  if defined(ERTS_ALC_A_EXEC) && defined(__x86_64__)
+   /*
+    * On x86_64, exec_alloc employs its own super carrier 'erts_exec_mmaper'
+    * to ensure low memory for HiPE AMD64 small code model.
+    */
+#   define ERTS_HAVE_EXEC_MMAPPER
 extern ErtsMemMapper erts_exec_mmapper;
 #  endif
+
+# endif /* ERTS_HAVE_OS_PHYSICAL_MEMORY_RESERVATION */
 #endif /* ERTS_WANT_MEM_MAPPERS */
 
 /*#define HARD_DEBUG_MSEG*/
diff --git a/erts/emulator/sys/common/erl_mseg.c b/erts/emulator/sys/common/erl_mseg.c
index 882c93a83c..4dd986f4c8 100644
--- a/erts/emulator/sys/common/erl_mseg.c
+++ b/erts/emulator/sys/common/erl_mseg.c
@@ -1414,7 +1414,7 @@ erts_mseg_init(ErtsMsegInit_t *init)
 
     erts_mtx_init(&init_atoms_mutex, "mseg_init_atoms");
 
-#ifdef ERTS_ALC_A_EXEC
+#ifdef ERTS_HAVE_EXEC_MMAPPER
     /* Initialize erts_exec_mapper *FIRST*, to increase probability
      * of getting low memory for HiPE AMD64's small code model.
      */
diff --git a/erts/emulator/sys/unix/erl_unix_sys.h b/erts/emulator/sys/unix/erl_unix_sys.h
index b64b0d87f6..bd554238b7 100644
--- a/erts/emulator/sys/unix/erl_unix_sys.h
+++ b/erts/emulator/sys/unix/erl_unix_sys.h
@@ -46,10 +46,10 @@
 #include <signal.h>
 #include <setjmp.h>
 
-#if HAVE_SYS_SOCKETIO_H
+#ifdef HAVE_SYS_SOCKETIO_H
 #   include <sys/socketio.h>
 #endif
-#if HAVE_SYS_SOCKIO_H
+#ifdef HAVE_SYS_SOCKIO_H
 #   include <sys/sockio.h>
 #endif