[PATCH] Kbuild: index asm-$(SUBARCH) headers for UML

In Uml, many definitions are borrowed from underlying subarch headers (with
#include <asm/arch/stuff.h>).  And it has become annoying to keep switching
tag files all time, so by default index the underlying subarch headers too.
Btw, it adds negligible space to the tags file (less than 1M surely, IIRC it
was around 500k over 40M).

Finally, preserve the ALLSOURCE_ARCHS command line option (I hope) - if it is
set, it is used for headers too as before.  But check my construct please, I
didn't test this.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Acked-by: Jeff Dike <jdike@addtoit.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/Makefile b/Makefile
index 8560b79268ba1aa2b1648e85311a11aeef83d302..c31914400953b05438b6cda4e793d166094b2ee4 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -1193,6 +1193,17 @@ else
 __srctree = $(srctree)/
 endif
 
+ifeq ($(ALLSOURCE_ARCHS),)
+ifeq ($(ARCH),um)
+ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
+else
+ALLINCLUDE_ARCHS := $(ARCH)
+endif
+else
+#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
+ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
+endif
+
 ALLSOURCE_ARCHS := $(ARCH)
 
 define all-sources
@@ -1208,7 +1219,7 @@ define all-sources
          find $(__srctree)include $(RCS_FIND_IGNORE) \
               \( -name config -o -name 'asm-*' \) -prune \
               -o -name '*.[chS]' -print; \
-         for ARCH in $(ALLSOURCE_ARCHS) ; do \
+         for ARCH in $(ALLINCLUDE_ARCHS) ; do \
               find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
                    -name '*.[chS]' -print; \
          done ; \