x86 merge fallout: uml

Don't undef __i386__/__x86_64__ in uml anymore, make sure that (few) places
that required adjusting the ifdefs got those.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/um/Makefile-i386 b/arch/um/Makefile-i386
index 0178df3..08433f8 100644
--- a/arch/um/Makefile-i386
+++ b/arch/um/Makefile-i386
@@ -9,6 +9,7 @@
 ELF_FORMAT 		:= elf32-$(SUBARCH)
 OBJCOPYFLAGS  		:= -O binary -R .note -R .comment -S
 HEADER_ARCH		:= x86
+CHECKFLAGS	+= -D__i386__
 
 ifeq ("$(origin SUBARCH)", "command line")
 ifneq ("$(shell uname -m | sed -e s/i.86/i386/)", "$(SUBARCH)")
@@ -26,8 +27,6 @@
 CONFIG_X86_32		:= y
 export CONFIG_X86_32
 
-ARCH_KERNEL_DEFINES += -U__$(SUBARCH)__ -U$(SUBARCH)
-
 # First of all, tune CFLAGS for the specific CPU. This actually sets cflags-y.
 include $(srctree)/arch/i386/Makefile.cpu
 
diff --git a/arch/um/Makefile-x86_64 b/arch/um/Makefile-x86_64
index fe5316f..8ed362f 100644
--- a/arch/um/Makefile-x86_64
+++ b/arch/um/Makefile-x86_64
@@ -6,12 +6,9 @@
 
 _extra_flags_ = -fno-builtin -m64
 
-#We #undef __x86_64__ for kernelspace, not for userspace where
-#it's needed for headers to work!
-ARCH_KERNEL_DEFINES = -U__$(SUBARCH)__
 KBUILD_CFLAGS += $(_extra_flags_)
 
-CHECKFLAGS  += -m64
+CHECKFLAGS  += -m64 -D__x86_64__
 KBUILD_AFLAGS += -m64
 LDFLAGS += -m elf_x86_64
 KBUILD_CPPFLAGS += -m64