From: Paul Eggert <eggert@cs.ucla.edu>
Date: Sat, 24 Dec 2016 02:28:44 +0000 (-0800)
Subject: Use max_align_t instead of void *
X-Git-Tag: emacs-26.0.90~1026
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=e2767bd010d5c30df97789b8b56a42eff4234e5b;p=emacs.git

Use max_align_t instead of void *

* src/thread.c (run_thread): Don’t assume void * is aligned enough.
---

diff --git a/src/thread.c b/src/thread.c
index 3f9595274e9..0bb0b7e006a 100644
--- a/src/thread.c
+++ b/src/thread.c
@@ -645,17 +645,12 @@ run_thread (void *state)
 {
   /* Make sure stack_top and m_stack_bottom are properly aligned as GC
      expects.  */
-  union
-  {
-    void *p;
-    char c;
-  } stack_pos;
+  max_align_t stack_pos;
 
   struct thread_state *self = state;
   struct thread_state **iter;
 
-  self->m_stack_bottom = &stack_pos.c;
-  self->stack_top = &stack_pos.c;
+  self->m_stack_bottom = self->stack_top = (char *) &stack_pos;
   self->thread_id = sys_thread_self ();
 
   acquire_global_lock (self);