[3.7] Revert "align PyGC_Head to alignof(long double) (GH-13335)" (GH-13569)
This reverts commit ea2b76bdc5f97f49701213d105b8ec2387ea2fa5.
See the bug for discussion.
https://bugs.python.org/issue27987
diff --git a/Include/objimpl.h b/Include/objimpl.h
index 0436ba7..057bb50 100644
--- a/Include/objimpl.h
+++ b/Include/objimpl.h
@@ -255,11 +255,7 @@
union _gc_head *gc_prev;
Py_ssize_t gc_refs;
} gc;
- long double dummy; /* force worst-case alignment */
- // malloc returns memory block aligned for any built-in types and
- // long double is the largest standard C type.
- // On amd64 linux, long double requires 16 byte alignment.
- // See bpo-27987 for more discussion.
+ double dummy; /* force worst-case alignment */
} PyGC_Head;
extern PyGC_Head *_PyGC_generation0;