[PATCH] s390: move arch/s390/defconfig to arch/s390/configs/defconfig

[Masahiro Yamada]

As of Linux 5.1, alpha and s390 are the last architectures that
have defconfig in arch/*/ instead of arch/*/configs/.

  $ find arch -name defconfig | sort
  arch/alpha/defconfig
  arch/arm64/configs/defconfig
  arch/csky/configs/defconfig
  arch/nds32/configs/defconfig
  arch/riscv/configs/defconfig
  arch/s390/defconfig

The arch/$(ARCH)/defconfig is the hard-coded default in Kconfig,
and I want to deprecate it after evacuating the remaining defconfig
into the standard location, arch/*/configs/.

Define KBUILD_DEFCONFIG like other architectures, and move defconfig
into the configs/ subdirectory.

Signed-off-by: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>
---

 arch/s390/Makefile                | 2 ++
 arch/s390/{ => configs}/defconfig | 0
 2 files changed, 2 insertions(+)
 rename arch/s390/{ => configs}/defconfig (100%)

diff --git a/arch/s390/Makefile b/arch/s390/Makefile
index df1d6a150f30..de8521fc9de5 100644
--- a/arch/s390/Makefile
+++ b/arch/s390/Makefile
@@ -10,6 +10,8 @@
 # Copyright (C) 1994 by Linus Torvalds
 #
 
+KBUILD_DEFCONFIG := defconfig
+
 LD_BFD		:= elf64-s390
 KBUILD_LDFLAGS	:= -m elf64_s390
 KBUILD_AFLAGS_MODULE += -fPIC
diff --git a/arch/s390/defconfig b/arch/s390/configs/defconfig
similarity index 100%
rename from arch/s390/defconfig
rename to arch/s390/configs/defconfig
-- 
2.17.1