Re: [PATCH 1/3] tools include: Add uapi mman.h for each architecture

[Arnaldo Carvalho de Melo]

Em Mon, Sep 12, 2016 at 04:07:42PM -0300, Arnaldo Carvalho de Melo escreveu:
> Em Mon, Sep 12, 2016 at 12:54:29PM +0000, Wang Nan escreveu:
> > Some mmap related macros have different values for different
> > architectures. This patch introduces uapi mman.h for each
> > architectures.
> > 
> > Three headers are cloned from kernel include to tools/include:
> > 
> >  tools/include/uapi/asm-generic/mman-common.h
> >  tools/include/uapi/asm-generic/mman.h
> >  tools/include/uapi/linux/mman.h
> 
> Cool, the above was done as copies, why not the rest? IIRC you mentioned
> some reasoning behind that decision, but we need it spelled out here.
> 
> For instance, I went on and look at arch/xtensa/include/uapi/asm/mman.h,
> and couldn't find why we shouldn't copy it just like the three files
> above.
> 
> I'm looking now at why the build breaks in so many systems, first hunch
> is that bits/ part (the ones without the failure details probably have
> the same errors), alpine uses musl libc, but some that broke are glibc
> based.

So, please take a look at my perf/core branch, I applied 1/3 and 3/3,
but took a different path for 2/3, now it builds for all systems I have
containers for:

  # time dm
   1 67.700 alpine:3.4: Ok
   2 23.565 android-ndk:r12b-arm: Ok
   3 67.823 archlinux:latest: Ok
   4 37.277 centos:5: Ok
   5 57.621 centos:6: Ok
   6 68.348 centos:7: Ok
   7 61.971 debian:7: Ok
   8 65.711 debian:8: Ok
   9 36.894 debian:experimental: Ok
  10 66.274 fedora:20: Ok
  11 70.054 fedora:21: Ok
  12 68.310 fedora:22: Ok
  13 68.033 fedora:23: Ok
  14 72.322 fedora:24: Ok
  15 29.529 fedora:24-x-ARC-uClibc: Ok
  16 77.458 fedora:rawhide: Ok
  17 80.110 mageia:5: Ok
  18 72.664 opensuse:13.2: Ok
  19 70.878 opensuse:42.1: Ok
  20 80.322 opensuse:tumbleweed: Ok
  21 62.237 ubuntu:12.04.5: Ok
  22 39.998 ubuntu:14.04: Ok
  23 69.383 ubuntu:14.04.4: Ok
  24 76.120 ubuntu:15.10: Ok
  25 69.668 ubuntu:16.04: Ok
  26 69.061 ubuntu:16.04-x-arm: Ok
  27 73.337 ubuntu:16.04-x-arm64: Ok
  28 77.061 ubuntu:16.04-x-powerpc64: Ok
  29 55.340 ubuntu:16.04-x-powerpc64el: Ok
  30 85.579 ubuntu:16.10: Ok
  31 59.645 ubuntu:16.10-x-s390: Ok

  real	32m59.385s
  user	0m1.856s
  sys	0m2.077s
  #