x86, um: get rid of arch/um/os symlink

we can get DEV_NULL defined for arch/um/drivers/null.c in less
convoluted ways, TYVM...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

1 files changed, 2 insertions, 13 deletions

diff --git a/arch/um/Makefile b/arch/um/Makefile
index 2606bdaefcb6..10894405ca75 100644
--- a/arch/um/Makefile
+++ b/arch/um/Makefile
@@ -18,12 +18,9 @@ core-y			+= $(ARCH_DIR)/kernel/		\
                            $(ARCH_DIR)/drivers/         \
                            $(ARCH_DIR)/os-$(OS)/
 
-# XXX: The "os" symlink is only used by arch/um/include/os.h, which includes
-# ../os/include/file.h
-#
 # These are cleaned up during mrproper. Please DO NOT fix it again, this is
 # the Correct Thing(tm) to do!
-ARCH_SYMLINKS = $(ARCH_DIR)/os $(ARCH_DIR)/include/shared/uml-config.h
+ARCH_SYMLINKS = $(ARCH_DIR)/include/shared/uml-config.h
 
 MODE_INCLUDE    += -I$(srctree)/$(ARCH_DIR)/include/shared/skas
 
@@ -143,14 +140,6 @@ $(objtree)/$(ARCH_DIR)/include/shared:
         @echo '  MKDIR $@'
         $(Q)mkdir -p $@
 
-$(ARCH_DIR)/os:
-        @echo '  SYMLINK $@'
-ifneq ($(KBUILD_SRC),)
-        $(Q)ln -fsn $(srctree)/$(ARCH_DIR)/os-$(OS) $@
-else
-        $(Q)ln -fsn os-$(OS) $@
-endif
-
 # Generated files
 define filechk_umlconfig
         sed 's/ CONFIG/ UML_CONFIG/'
@@ -182,4 +171,4 @@ $(ARCH_DIR)/include/shared/kern_constants.h: $(objtree)/$(ARCH_DIR)/include/shar
         @echo '  SYMLINK $@'
         $(Q)ln -sf ../../../../include/asm/asm-offsets.h $@
 
-export SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING OS HEADER_ARCH
+export SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING OS HEADER_ARCH DEV_NULL_PATH