[PATCH] kbuild: s390, do not remove autogenerated headers on clean

[Jiri Slaby]

'make clean' does NOT remove autogenerated headers generated from
arch/s390/kernel/syscalls/. For example:
asm-offsets.h
irq_regs.h
irq_work.h
unistd_nr.h

But 'make clean' DOES currently remove dis-defs.h and facility-defs.h
generated from arch/s390/tools/.

The issue is that facility-defs.h is included from <asm/facility.h> and
builds of external modules fail due to missing header. (When cleaned
build directory is used.)

Fix this by adding these targets to no-clean-files.

Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
Cc: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>
Cc: Michal Marek <michal.lkml@xxxxxxxxxxx>
Cc: linux-kbuild@xxxxxxxxxxxxxxx
Cc: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
Cc: Vasily Gorbik <gor@xxxxxxxxxxxxx>
Cc: Christian Borntraeger <borntraeger@xxxxxxxxxx>
Cc: linux-s390@xxxxxxxxxxxxxxx
---

I would love to see comments from KBuild guys as I am not sure if this
fix is correct at all.

 arch/s390/tools/Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/s390/tools/Makefile b/arch/s390/tools/Makefile
index 2342b84b3386..984b2f43651e 100644
--- a/arch/s390/tools/Makefile
+++ b/arch/s390/tools/Makefile
@@ -7,6 +7,7 @@ kapi := arch/$(ARCH)/include/generated/asm
 kapi-hdrs-y := $(kapi)/facility-defs.h $(kapi)/dis-defs.h
 
 targets += $(addprefix ../../../,$(kapi-hdrs-y))
+no-clean-files += $(targets)
 PHONY += kapi
 
 kapi:	$(kapi-hdrs-y)
-- 
2.21.0