Re: [PATCH RFC 1/7] xen: Relocate mem_access and mem_event into common.

["Jan Beulich" <JBeulich@suse.com>]

>>> On 22.08.14 at 11:30, <tamas.lengyel@zentific.com> wrote:
> In preparation to add support for ARM LPAE mem_event, relocate mem_access
> and mem_event into common Xen code. This patch makes no functional changes
> to the X86 side, for ARM mem_event and mem_access functions are just
> placeholder stubs.

"Makes no functional changes" is a little too weak a statement to
efficiently review such a big patch: Please clarify how much of the
non-benign changes (like asm/ -> xen/ include file path adjustments)
is really just code movement vs. where you needed to actually alter
the code.

>  xen/arch/x86/domctl.c            |   2 +-
>  xen/arch/x86/hvm/hvm.c           |  61 +---
>  xen/arch/x86/mm/Makefile         |   2 -
>  xen/arch/x86/mm/hap/nested_ept.c |   2 +-
>  xen/arch/x86/mm/hap/nested_hap.c |   2 +-
>  xen/arch/x86/mm/mem_access.c     | 133 --------
>  xen/arch/x86/mm/mem_event.c      | 705 --------------------------------------
>  xen/arch/x86/mm/mem_paging.c     |   2 +-
>  xen/arch/x86/mm/mem_sharing.c    |   2 +-
>  xen/arch/x86/mm/p2m-pod.c        |   2 +-
>  xen/arch/x86/mm/p2m-pt.c         |   2 +-
>  xen/arch/x86/mm/p2m.c            |   2 +-
>  xen/arch/x86/x86_64/compat/mm.c  |   4 +-
>  xen/arch/x86/x86_64/mm.c         |   4 +-
>  xen/common/Makefile              |   2 +
>  xen/common/domain.c              |   1 +
>  xen/common/mem_access.c          | 137 ++++++++
>  xen/common/mem_event.c           | 707 +++++++++++++++++++++++++++++++++++++++
>  xen/common/memory.c              |  62 ++++
>  xen/include/asm-arm/mm.h         |   1 -
>  xen/include/asm-x86/hvm/hvm.h    |   6 -
>  xen/include/asm-x86/mem_access.h |  39 ---
>  xen/include/asm-x86/mem_event.h  |  82 -----
>  xen/include/asm-x86/mm.h         |   2 -
>  xen/include/xen/mem_access.h     |  58 ++++
>  xen/include/xen/mem_event.h      | 141 ++++++++
>  xen/include/xen/mm.h             |   6 +
>  27 files changed, 1128 insertions(+), 1041 deletions(-)

This changes maintainership of a couple of files without also
adjusting ./MAINTAINERS.

>  delete mode 100644 xen/arch/x86/mm/mem_access.c
>  delete mode 100644 xen/arch/x86/mm/mem_event.c
>  create mode 100644 xen/common/mem_access.c
>  create mode 100644 xen/common/mem_event.c
>  delete mode 100644 xen/include/asm-x86/mem_access.h
>  delete mode 100644 xen/include/asm-x86/mem_event.h
>  create mode 100644 xen/include/xen/mem_access.h
>  create mode 100644 xen/include/xen/mem_event.h

Doesn't git have a mode where moves can be reflected as ordinary
diffs rather than as deletes/creates? While I'm not sure my scripts
would cope with applying such a patch, it surely would make review
easier (and perhaps even eliminate the question raised at the top).

Jan