From 9f01520e9bbdb145f9a608b502533c8ce83d3c9b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Hillerstr=C3=B6m?= <daniel.hillerstrom@ed.ac.uk>
Date: Thu, 3 Mar 2022 14:23:27 +0000
Subject: [PATCH] Sync fiber_primitives.c with upstream runtime/fiber.c

---
 fiber_primitives.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/fiber_primitives.c b/fiber_primitives.c
index 4ecb5f1..5ede3e4 100644
--- a/fiber_primitives.c
+++ b/fiber_primitives.c
@@ -30,6 +30,12 @@
 #include <caml/frame_descriptors.h>
 #endif
 
+#ifdef USE_MMAP_MAP_STACK
+#include <sys/mman.h>
+#endif
+
+#define NUM_STACK_SIZE_CLASSES 5 // defined in runtime/fiber.c
+
 Caml_inline struct stack_info* alloc_for_stack (mlsize_t wosize)
 {
   size_t len = sizeof(struct stack_info) +