From 65b8cfb2a0b6854271dbd8baf5203896223cd4ce Mon Sep 17 00:00:00 2001
From: Denis Vlasenko <vda.linux@googlemail.com>
Date: Mon, 23 Jul 2007 21:05:06 +0000
Subject: add comment why preferred stack boundary is 4 on i386

---
 arch/i386/Makefile | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'arch')

diff --git a/arch/i386/Makefile b/arch/i386/Makefile
index 385dd52be..e6c99c67d 100644
--- a/arch/i386/Makefile
+++ b/arch/i386/Makefile
@@ -2,4 +2,6 @@
 # Build system
 # ==========================================================================
 
+# -mpreferred-stack-boundary=2 is essential in preventing gcc 4.2.x
+# from aligning stack to 16 bytes. (Which is gcc's way of supporting SSE).
 CFLAGS += $(call cc-option,-march=i386 -mpreferred-stack-boundary=2,)
-- 
cgit v1.2.3