[PATCH] Fix headers_check for O= builds; disable automatic check on UML.

* make header_check work with O=

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Makefile

@@ -742,7 +742,7 @@ endif # ifdef CONFIG_KALLSYMS
 # vmlinux image - including updated kernel symbols
 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
 ifdef CONFIG_HEADERS_CHECK
-	$(Q)$(MAKE) headers_check
+	$(Q)$(MAKE) -f $(srctree)/Makefile headers_check
 endif
 	$(call if_changed_rule,vmlinux__)
 	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
@@ -935,7 +935,7 @@ headers_install_all: include/linux/version.h scripts_basic FORCE
 
 PHONY += headers_install
 headers_install: include/linux/version.h scripts_basic FORCE
-	@if [ ! -r include/asm-$(ARCH)/Kbuild ]; then \
+	@if [ ! -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
 	  echo '*** Error: Headers not exportable for this architecture ($(ARCH))'; \
 	  exit 1 ; fi
 	$(Q)$(MAKE) $(build)=scripts scripts/unifdef