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Arnaldo Carvalho de Melo 1f27a050fc tools arch: Update arch/x86/lib/memcpy_64.S copy used in 'perf bench mem memcpy' 
To cope with the changes in:

  12c89130a5 ("x86/asm/memcpy_mcsafe: Add write-protection-fault handling")
  60622d6822 ("x86/asm/memcpy_mcsafe: Return bytes remaining")
  bd131544aa ("x86/asm/memcpy_mcsafe: Add labels for __memcpy_mcsafe() write fault handling")
  da7bc9c57e ("x86/asm/memcpy_mcsafe: Remove loop unrolling")

This needed introducing a file with a copy of the mcsafe_handle_tail()
function, that is used in the new memcpy_64.S file, as well as a dummy
mcsafe_test.h header.

Testing it:

  $ nm ~/bin/perf | grep mcsafe
  0000000000484130 T mcsafe_handle_tail
  0000000000484300 T __memcpy_mcsafe
  $
  $ perf bench mem memcpy
  # Running 'mem/memcpy' benchmark:
  # function 'default' (Default memcpy() provided by glibc)
  # Copying 1MB bytes ...

      44.389205 GB/sec
  # function 'x86-64-unrolled' (unrolled memcpy() in arch/x86/lib/memcpy_64.S)
  # Copying 1MB bytes ...

      22.710756 GB/sec
  # function 'x86-64-movsq' (movsq-based memcpy() in arch/x86/lib/memcpy_64.S)
  # Copying 1MB bytes ...

      42.459239 GB/sec
  # function 'x86-64-movsb' (movsb-based memcpy() in arch/x86/lib/memcpy_64.S)
  # Copying 1MB bytes ...

      42.459239 GB/sec
  $

This silences this perf tools build warning:

  Warning: Kernel ABI header at 'tools/arch/x86/lib/memcpy_64.S' differs from latest version at 'arch/x86/lib/memcpy_64.S'

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mika Penttilä <mika.penttila@nextfour.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-igdpciheradk3gb3qqal52d0@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2018-07-30 12:36:51 -03:00
..
alpha/include tools include arch: Grab a copy of errno.h for arch's supported by perf 2018-01-23 09:51:37 -03:00
arc/include/uapi/asm License cleanup: add SPDX license identifier to uapi header files with no license 2017-11-02 11:19:54 +01:00
arm/include tools/headers: Pick up latest kernel ABIs 2018-06-26 08:43:14 +02:00
arm64/include tools/headers: Pick up latest kernel ABIs 2018-06-26 08:43:14 +02:00
h8300/include License cleanup: add SPDX license identifier to uapi header files with no license 2017-11-02 11:19:54 +01:00
hexagon/include/uapi/asm License cleanup: add SPDX license identifier to uapi header files with a license 2017-11-02 11:20:11 +01:00
ia64/include License cleanup: add SPDX license identifier to uapi header files with no license 2017-11-02 11:19:54 +01:00
microblaze/include/uapi/asm License cleanup: add SPDX license identifier to uapi header files with no license 2017-11-02 11:19:54 +01:00
mips/include tools include arch: Grab a copy of errno.h for arch's supported by perf 2018-01-23 09:51:37 -03:00
parisc/include/uapi/asm tools include arch: Grab a copy of errno.h for arch's supported by perf 2018-01-23 09:51:37 -03:00
powerpc/include tools headers powerpc: Update asm/unistd.h copy to pick new 2018-07-30 11:51:13 -03:00
s390/include Revert "tools include s390: Grab a copy of arch/s390/include/uapi/asm/unistd.h" 2018-02-15 10:06:15 -03:00
sh/include License cleanup: add SPDX license identifier to uapi header files with no license 2017-11-02 11:19:54 +01:00
sparc/include tools include arch: Grab a copy of errno.h for arch's supported by perf 2018-01-23 09:51:37 -03:00
x86 tools arch: Update arch/x86/lib/memcpy_64.S copy used in 'perf bench mem memcpy' 2018-07-30 12:36:51 -03:00
xtensa/include License cleanup: add SPDX license identifier to uapi header files with no license 2017-11-02 11:19:54 +01:00