kbuild: re-implement Makefile.headersinst without recursion
Since commit fcc8487d477a ("uapi: export all headers under uapi
directories"), the headers in uapi directories are all exported by
default although exceptional cases are still allowed by the syntax
'no-export-headers'.
The traditional directory descending has been kept (in a somewhat
hacky way), but it is actually unneeded.
Get rid of it to simplify the code.
Also, handle files one by one instead of the previous per-directory
processing. This will emit much more log, but I like it.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/include/uapi/Kbuild b/include/uapi/Kbuild
new file mode 100644
index 0000000..61ee6e5
--- /dev/null
+++ b/include/uapi/Kbuild
@@ -0,0 +1,14 @@
+# SPDX-License-Identifier: GPL-2.0
+ifeq ($(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/a.out.h),)
+no-export-headers += linux/a.out.h
+endif
+
+ifeq ($(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/kvm.h),)
+no-export-headers += linux/kvm.h
+endif
+
+ifeq ($(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/kvm_para.h),)
+ifeq ($(wildcard $(objtree)/arch/$(SRCARCH)/include/generated/uapi/asm/kvm_para.h),)
+no-export-headers += linux/kvm_para.h
+endif
+endif