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Subject[PATCH 1/9] Kbuild: index asm-$(SUBARCH) headers for UML
From: Paolo 'Blaisorblade' Giarrusso <>

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 <>

Makefile | 13 ++++++++++++-
1 files changed, 12 insertions(+), 1 deletions(-)

diff --git a/Makefile b/Makefile
index 6d1f727..d1b6773 100644
--- a/Makefile
+++ b/Makefile
@@ -1192,6 +1192,17 @@ else
__srctree = $(srctree)/

+ifeq ($(ARCH),um)
+#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.

define all-sources
@@ -1207,7 +1218,7 @@ 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 ; \
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