linux-kernel - Disable generation of sse3 instructions in kernel build.

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Message-Id: <200905091903.25745.lkml@morethan.org>
Date:	Sat, 9 May 2009 19:03:22 -0500
From:	"Michael S. Zick" <lkml@...ethan.org>
To:	linux-kernel@...r.kernel.org
Subject: Disable generation of sse3 instructions in kernel build.

Ref: 2.6.30-rcX
The option to disable sse3 instructions needs to be added to build system for x86.
Otherwise strange and mysterious things happen (tm).

Like (also attached):
diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index 8c86b72..3c0df6f 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -103,7 +103,7 @@ KBUILD_CFLAGS += -Wno-sign-compare
 #
 KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
 # prevent gcc from generating any FP code by mistake
-KBUILD_CFLAGS += $(call cc-option,-mno-sse -mno-mmx -mno-sse2 -mno-3dnow,)
+KBUILD_CFLAGS += $(call cc-option,-mno-sse -mno-mmx -mno-sse2 -mno-sse3 -mno-3dnow,)

 KBUILD_CFLAGS += $(mflags-y)
 KBUILD_AFLAGS += $(mflags-y)

View attachment "00-fix-kbuild-flags.patch" of type "text/x-diff" (516 bytes)