Reuse sysconf result

1 files changed, 12 insertions, 12 deletions

diff --git a/gc.c b/gc.c
index a1ed084d23..dcdc8fd4c8 100644
--- a/gc.c
+++ b/gc.c
@@ -3213,6 +3213,17 @@ Init_heap(void)
 {
     rb_objspace_t *objspace = &rb_objspace;
 
+#if defined(HAVE_SYSCONF) && defined(_SC_PAGE_SIZE)
+    /* If Ruby's heap pages are not a multiple of the system page size, we
+     * cannot use mprotect for the read barrier, so we must disable automatic
+     * compaction. */
+    int pagesize;
+    pagesize = (int)sysconf(_SC_PAGE_SIZE);
+    if ((HEAP_PAGE_SIZE % pagesize) != 0) {
+        ruby_enable_autocompact = 0;
+    }
+#endif
+
 #if defined(HAVE_MMAP) && !HAVE_CONST_PAGE_SIZE && !defined(PAGE_MAX_SIZE)
     /* Need to determine if we can use mmap at runtime. */
 # ifdef PAGE_SIZE
@@ -3220,24 +3231,13 @@ Init_heap(void)
     use_mmap_aligned_alloc = PAGE_SIZE <= HEAP_PAGE_SIZE;
 # elif defined(HAVE_SYSCONF) && defined(_SC_PAGE_SIZE)
     /* If we can use sysconf to determine the page size. */
-    use_mmap_aligned_alloc = sysconf(_SC_PAGE_SIZE) <= HEAP_PAGE_SIZE;
+    use_mmap_aligned_alloc = pagesize <= HEAP_PAGE_SIZE;
 # else
     /* Otherwise we can't determine the system page size, so don't use mmap. */
     use_mmap_aligned_alloc = FALSE;
 # endif
 #endif
 
-#if defined(HAVE_SYSCONF) && defined(_SC_PAGE_SIZE)
-    /* If Ruby's heap pages are not a multiple of the system page size, we
-     * cannot use mprotect for the read barrier, so we must disable automatic
-     * compaction. */
-    int pagesize;
-    pagesize = (int)sysconf(_SC_PAGE_SIZE);
-    if ((HEAP_PAGE_SIZE % pagesize) != 0) {
-        ruby_enable_autocompact = 0;
-    }
-#endif
-
     objspace->next_object_id = INT2FIX(OBJ_ID_INITIAL);
     objspace->id_to_obj_tbl = st_init_table(&object_id_hash_type);
     objspace->obj_to_id_tbl = st_init_numtable();