#!/bin/sh

  # SPDX-License-Identifier: GPL-2.0

  FILES='

  include/uapi/linux/const.h

  include/uapi/drm/drm.h
  include/uapi/drm/i915_drm.h

  include/uapi/linux/fadvise.h

  include/uapi/linux/fcntl.h

  include/uapi/linux/fs.h

  include/uapi/linux/fscrypt.h

  include/uapi/linux/kcmp.h

  include/uapi/linux/kvm.h

  include/uapi/linux/in.h

  include/uapi/linux/mount.h

  include/uapi/linux/openat2.h

  include/uapi/linux/perf_event.h

  include/uapi/linux/prctl.h

  include/uapi/linux/sched.h

  include/uapi/linux/stat.h

  include/uapi/linux/usbdevice_fs.h

  include/uapi/linux/vhost.h

  include/uapi/sound/asound.h

  include/linux/bits.h

  include/linux/const.h

  include/linux/hash.h
  include/uapi/linux/hw_breakpoint.h
  arch/x86/include/asm/disabled-features.h
  arch/x86/include/asm/required-features.h
  arch/x86/include/asm/cpufeatures.h

  arch/x86/include/asm/inat_types.h

  arch/x86/include/asm/emulate_prefix.h

  arch/x86/include/asm/irq_vectors.h

  arch/x86/include/asm/msr-index.h

  arch/x86/include/uapi/asm/prctl.h

  arch/x86/lib/x86-opcode-map.txt
  arch/x86/tools/gen-insn-attr-x86.awk

  arch/arm/include/uapi/asm/perf_regs.h
  arch/arm64/include/uapi/asm/perf_regs.h
  arch/powerpc/include/uapi/asm/perf_regs.h

  arch/s390/include/uapi/asm/perf_regs.h

  arch/x86/include/uapi/asm/perf_regs.h
  arch/x86/include/uapi/asm/kvm.h
  arch/x86/include/uapi/asm/kvm_perf.h
  arch/x86/include/uapi/asm/svm.h

  arch/x86/include/uapi/asm/unistd.h

  arch/x86/include/uapi/asm/vmx.h
  arch/powerpc/include/uapi/asm/kvm.h
  arch/s390/include/uapi/asm/kvm.h
  arch/s390/include/uapi/asm/kvm_perf.h

  arch/s390/include/uapi/asm/ptrace.h

  arch/s390/include/uapi/asm/sie.h
  arch/arm/include/uapi/asm/kvm.h
  arch/arm64/include/uapi/asm/kvm.h

  arch/arm64/include/uapi/asm/unistd.h

  arch/alpha/include/uapi/asm/errno.h
  arch/mips/include/asm/errno.h
  arch/mips/include/uapi/asm/errno.h
  arch/parisc/include/uapi/asm/errno.h
  arch/powerpc/include/uapi/asm/errno.h
  arch/sparc/include/uapi/asm/errno.h
  arch/x86/include/uapi/asm/errno.h

  include/asm-generic/bitops/arch_hweight.h
  include/asm-generic/bitops/const_hweight.h
  include/asm-generic/bitops/__fls.h
  include/asm-generic/bitops/fls.h
  include/asm-generic/bitops/fls64.h
  include/linux/coresight-pmu.h

  include/uapi/asm-generic/errno.h
  include/uapi/asm-generic/errno-base.h

  include/uapi/asm-generic/ioctls.h

  include/uapi/asm-generic/mman-common.h

  include/uapi/asm-generic/unistd.h

  '

  check_2 () {
    file1=$1
    file2=$2

  
    shift

    shift

    cmd="diff $* $file1 $file2 > /dev/null"

    test -f $file2 && {
      eval $cmd || {

        echo "Warning: Kernel ABI header at '$file1' differs from latest version at '$file2'" >&2
        echo diff -u $file1 $file2

      }
    }

  }

  check () {
    file=$1
  
    shift

    check_2 tools/$file $file $*

  }

  # Check if we have the kernel headers (tools/perf/../../include), else
  # we're probably on a detached tarball, so no point in trying to check
  # differences.
  test -d ../../include || exit 0

  cd ../..

  # simple diff check

  for i in $FILES; do

    check $i -B
  done
  
  # diff with extra ignore lines

  check arch/x86/lib/memcpy_64.S        '-I "^EXPORT_SYMBOL" -I "^#include <asm/export.h>" -I"^SYM_FUNC_START\(_LOCAL\)*(memcpy_\(erms\|orig\))"'
  check arch/x86/lib/memset_64.S        '-I "^EXPORT_SYMBOL" -I "^#include <asm/export.h>" -I"^SYM_FUNC_START\(_LOCAL\)*(memset_\(erms\|orig\))"'

  check include/uapi/asm-generic/mman.h '-I "^#include <\(uapi/\)*asm-generic/mman-common\(-tools\)*.h>"'

  check include/uapi/linux/mman.h       '-I "^#include <\(uapi/\)*asm/mman.h>"'

  check include/linux/ctype.h	      '-I "isdigit("'
  check lib/ctype.c		      '-I "^EXPORT_SYMBOL" -I "^#include <linux/export.h>" -B'

  check arch/x86/include/asm/inat.h     '-I "^#include [\"<]\(asm/\)*inat_types.h[\">]"'
  check arch/x86/include/asm/insn.h     '-I "^#include [\"<]\(asm/\)*inat.h[\">]"'
  check arch/x86/lib/inat.c	      '-I "^#include [\"<]\(../include/\)*asm/insn.h[\">]"'

  check arch/x86/lib/insn.c             '-I "^#include [\"<]\(../include/\)*asm/in\(at\|sn\).h[\">]" -I "^#include [\"<]\(../include/\)*asm/emulate_prefix.h[\">]"'

  # diff non-symmetric files
  check_2 tools/perf/arch/x86/entry/syscalls/syscall_64.tbl arch/x86/entry/syscalls/syscall_64.tbl

  cd tools/perf