UAPI: Plumb the UAPI Kbuilds into the user header installation and checking

Plumb the UAPI Kbuilds into the user header installation and checking system.
As the headers are split the entries will be transferred across from the old
Kbuild files to the UAPI Kbuild files.

The changes made in this commit are:

 (1) Exported generated files (of which there are currently four) are moved to
     uapi/ directories under the appropriate generated/ directory, thus we
     get:

	include/generated/uapi/linux/version.h
	arch/x86/include/generated/uapi/asm/unistd_32.h
	arch/x86/include/generated/uapi/asm/unistd_64.h
	arch/x86/include/generated/uapi/asm/unistd_x32.h

     These paths were added to the build as -I flags in a previous patch.

 (2) scripts/Makefile.headersinst is now given the UAPI path to install from
     rather than the old path.

     It then determines the old path from that and includes that Kbuild also
     if it exists, thus permitting the headers to exist in either directory
     during the changeover.

     I also renamed the "install" variable to "installdir" as it refers to a
     directory not the install program.

 (3) scripts/headers_install.pl is altered to take a list of source file paths
     instead of just their names so that the makefile can tell it exactly
     where to find each file.

     For the moment, files can be obtained from one of four places for each
     output directory:

	.../include/uapi/foo/
	.../include/generated/uapi/foo/
	.../include/foo/
	.../include/generated/foo/

     The non-UAPI paths will be dropped later.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Dave Jones <davej@redhat.com>

1 files changed, 7 insertions, 7 deletions

diff --git a/Makefile b/Makefile
index 1a5d315e2842..86eb6acb3978 100644
--- a/Makefile
+++ b/Makefile
@@ -447,7 +447,7 @@ asm-generic:
 # Detect when mixed targets is specified, and make a second invocation
 # of make so .config is not included in this case either (for *config).
 
-version_h := include/generated/linux/version.h
+version_h := include/generated/uapi/linux/version.h
 
 no-dot-config-targets := clean mrproper distclean \
                          cscope gtags TAGS tags help %docs check% coccicheck \
@@ -908,10 +908,10 @@ headers_install_all:
 
 PHONY += headers_install
 headers_install: __headers
-        $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild),, \
-        $(error Headers not exportable for the $(SRCARCH) architecture))
-        $(Q)$(MAKE) $(hdr-inst)=include
-        $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst)
+        $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
+          $(error Headers not exportable for the $(SRCARCH) architecture))
+        $(Q)$(MAKE) $(hdr-inst)=include/uapi
+        $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst)
 
 PHONY += headers_check_all
 headers_check_all: headers_install_all
@@ -919,8 +919,8 @@ headers_check_all: headers_install_all
 
 PHONY += headers_check
 headers_check: headers_install
-        $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
-        $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst) HDRCHECK=1
+        $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
+        $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1
 
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