[PATCH v7 0/2] introduce stub directory to storing empty/stub headers

[Oleksii Kurochko <oleksii.kurochko@gmail.com>]

A lot of empty/stub headers should be introduced during the early steps of adding
support of new architecture.

An example can be found here:
1. https://lore.kernel.org/xen-devel/cover.1692181079.git.oleksii.kurochko@gmail.com/
2. https://lore.kernel.org/xen-devel/a92f99e8f697da99d77bfde562a549dbef3760ce.1692816595.git.sanastasio@raptorengineering.com/

As part of the patch series, asm/vm_event.h was moved to the stubs directory because
It is the same for ARM, PPC, and RISC-V.
---
Changes in V7:
- update warning message in Makefile.asm-generic
- add Reviewed-by: Anthony PERARD <anthony.perard@citrix.com> for patch 1
- add Acked-by: Jan Beulich <jbeulich@suse.com> for patch 1
- update header guards in asm-generic/vm_event.h.
- add Acked-by: Tamas K Lengyel <tamas@tklengyel.com> for patch 2
---
Changes in V6:
 - introduce $(asm-generic) macro in Kbuild.include.
 - move "asm-generic" after the rule "__distclean".
 - update the commit message.
---
Changes in V5:
- Update SPDX license.
- Remove code related to UML in Makefile.asm-generic.
- Include $(src)/Makefile instead of $(kbuild-file).
- Update comment message in Makefile.asm-generic.
- Update .gitignore.
- Update path to generated headers in CFLAGS.
- Use the latest version of Linux's Makefile.asm-generic.
- Introduce asm-generic's vm_event.h.
- Switch ARM to use asm-generic/vm_event.h.
---
Changes in V4:
 - add asm-generic support
 - update path of vm_event.h from include/asm-generic/asm to include/asm-generic
---
Changes in V3:
 - add Acked-by: Stefano Stabellini <sstabellini@kernel.org> for "xen: move arm/include/asm/vm_event.h to asm-generic"
 - update SPDX tag.
 - move asm/vm_event.h to asm-generic.
 - rename stubs dir to asm-generic.

---
Changes in V2:
 - change public/domctl.h to public/vm_event.h.
 - update commit message of [PATCH v2 2/2] xen: move arm/include/asm/vm_event.h to stubs

Oleksii Kurochko (2):
  xen: asm-generic support
  xen: move arm/include/asm/vm_event.h to asm-generic

 .gitignore                          |  1 +
 xen/Makefile                        |  9 +++-
 xen/arch/arm/include/asm/Makefile   |  2 +
 xen/arch/arm/include/asm/vm_event.h | 66 -----------------------------
 xen/include/asm-generic/vm_event.h  | 55 ++++++++++++++++++++++++
 xen/scripts/Kbuild.include          |  6 +++
 xen/scripts/Makefile.asm-generic    | 53 +++++++++++++++++++++++
 7 files changed, 125 insertions(+), 67 deletions(-)
 create mode 100644 xen/arch/arm/include/asm/Makefile
 delete mode 100644 xen/arch/arm/include/asm/vm_event.h
 create mode 100644 xen/include/asm-generic/vm_event.h
 create mode 100644 xen/scripts/Makefile.asm-generic

-- 
2.41.0