[PATCH] uml: fix missing KBUILD_BASENAME

2.6.15-mm1 caused kernel-offsets.c to stop compiling with a syntax error in a
header.  The problem was with KBUILD_BASENAME, which didn't get a definition
with the by-hand compilation in the main UML Makefile.

This was OK before since the expansion was syntactically the same as the
KBUILD_BASENAME token.  With -mm1, the expansion is now a quote-delimited
string, so there needs to be a definition of it.

Since kernel-offsets.c is basically the same as other arches' asm-offsets.c,
and those seem to build OK, this patch turns kernel-offsets.c into
asm-offsets.c.  kernel-offsets.c is in arch/um/sys-$(SUBARCH), i.e.  sys-i386
and sys-x86_64, while kbuild expects it to be in arch/um/kernel.
kernel-offsets.c is moved to
arch/um/include/sysdep-$(SUBARCH)/kernel-offsets.h, which is included by
arch/um/kernel/asm-offsets.c.  With that, include/asm-um/asm-offsets.h is
generated automatically.  kernel-offsets.h continues to exist because it needs
to be accessible to userspace UML code, and include/asm-um isn't.  So, a
symlink is made from arch/um/include/kernel-offsets.h to
include/asm-um/asm-offsets.h.
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/um/Makefile

@@ -189,6 +189,12 @@ define filechk_umlconfig
 	sed 's/ CONFIG/ UML_CONFIG/'
 endef
 
+$(ARCH_DIR)/include/uml-config.h : include/linux/autoconf.h
+	$(call filechk,umlconfig)
+
+$(ARCH_DIR)/user-offsets.s: $(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.c
+	$(CC) $(USER_CFLAGS) -S -o $@ $<
+
 define filechk_gen-asm-offsets
         (set -e; \
          echo "/*"; \
@@ -202,24 +208,13 @@ define filechk_gen-asm-offsets
          echo ""; )
 endef
 
-$(ARCH_DIR)/include/uml-config.h : include/linux/autoconf.h
-	$(call filechk,umlconfig)
-
-$(ARCH_DIR)/user-offsets.s: $(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.c
-	$(CC) $(USER_CFLAGS) -S -o $@ $<
-
 $(ARCH_DIR)/include/user_constants.h: $(ARCH_DIR)/user-offsets.s
 	$(call filechk,gen-asm-offsets)
 
 CLEAN_FILES += $(ARCH_DIR)/user-offsets.s
 
-$(ARCH_DIR)/kernel-offsets.s: $(ARCH_DIR)/sys-$(SUBARCH)/kernel-offsets.c \
-				   archprepare
-	$(CC) $(CFLAGS) $(NOSTDINC_FLAGS) $(CPPFLAGS) -S -o $@ $<
-
-$(ARCH_DIR)/include/kern_constants.h: $(ARCH_DIR)/kernel-offsets.s
-	$(call filechk,gen-asm-offsets)
-
-CLEAN_FILES += $(ARCH_DIR)/kernel-offsets.s
+$(ARCH_DIR)/include/kern_constants.h:
+	@echo '  SYMLINK $@'
+	$(Q) ln -sf ../../../include/asm-um/asm-offsets.h $@
 
 export SUBARCH USER_CFLAGS OS

arch/um/sys-i386/kernel-offsets.c → arch/um/include/sysdep-i386/kernel-offsets.h

-#include <linux/config.h>
 #include <linux/stddef.h>
 #include <linux/sched.h>
-#include <linux/time.h>
 #include <linux/elf.h>
-#include <asm/page.h>
 
 #define DEFINE(sym, val) \
 	asm volatile("\n->" #sym " %0 " #val : : "i" (val))

arch/um/kernel/asm-offsets.c

-/* Dummy file to make kbuild happy - unused! */
+#include "sysdep/kernel-offsets.h"