Several arch/*/include/uapi/asm/* header simply include the
corresponding <asm-generic/*> file. This patch allows such files to be
specified in uapi/asm/Kbuild via "generic-y += ..." to be automatically
generated (similar to asm/Kbuild).
Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
Signed-off-by: NDavid Howells <dhowells@redhat.com>
Cc: Michal Marek <mmarek@suse.cz>
Cc: Arnd Bergmann <arnd@arndb.de>

This patch silences a Makefile.asm-generic message
by defining a dummy rule for all.

make -f /usr/src/git/scripts/Makefile.asm-generic \
            obj=arch/x86/include/generated/asm
make[1]: Nothing to be done for `all'.
Signed-off-by: NPeter Foley <pefoley2@verizon.net>
Signed-off-by: NMichal Marek <mmarek@suse.cz>

Do nothing if arch/$(SRCARCH)/include/asm/Kbuild does not exist, which
is the case of um.
Reported-by: NRandy Dunlap <rdunlap@xenotime.net>
Signed-off-by: NMichal Marek <mmarek@suse.cz>
Acked-by: NRandy Dunlap <rdunlap@xenotime.net>
Acked-by: NSam Ravnborg <sam@ravnborg.org>

There is an increasing amount of header files
shared between individual architectures in asm-generic.
To avoid a lot of dummy wrapper files that just
include the corresponding file in asm-generic provide
some basic support in kbuild for this.

With the following patch an architecture can maintain
a list of files in the file arch/$(ARCH)/include/asm/Kbuild

To use a generic file just add:

        generic-y += <name-of-header-file.h>

For each file listed kbuild will generate the necessary
wrapper in arch/$(ARCH)/include/generated/asm.

When installing userspace headers a wrapper is likewise created.

The original inspiration for this came from the unicore32
patchset - although a different method is used.

The patch includes several improvements from Arnd Bergmann.
Michael Marek contributed Makefile.asm-generic.

Remis Baima did an intial implementation along to achive
the same - see https://patchwork.kernel.org/patch/13352/Signed-off-by: NSam Ravnborg <sam@ravnborg.org>
Acked-by: NGuan Xuetao <guanxuetao@mprc.pku.edu.cn>
Tested-by: NGuan Xuetao <guanxuetao@mprc.pku.edu.cn>
Acked-by: NArnd Bergmann <arnd@arndb.de>
Cc: Remis Lima Baima <remis.developer@googlemail.com>
Signed-off-by: NMichal Marek <mmarek@suse.cz>