Merge branch 'x86-build-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

Pull x86 build change from Ingo Molnar:
 "Explicitly disable x87 FPU instructions, to catch mistaken floating
  point use at build time, instead of crashing or misbehaving during run
  time"

* 'x86-build-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86: Disable generation of traditional x87 instructions

diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index eeda43a..a414b14 100644 (file)
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -82,8 +82,8 @@ else
         KBUILD_AFLAGS += -m64
         KBUILD_CFLAGS += -m64
 
-        # Don't autogenerate MMX or SSE instructions
-        KBUILD_CFLAGS += -mno-mmx -mno-sse
+        # Don't autogenerate traditional x87, MMX or SSE instructions
+        KBUILD_CFLAGS += -mno-mmx -mno-sse -mno-80387 -mno-fp-ret-in-387
 
        # Use -mpreferred-stack-boundary=3 if supported.
        KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=3)