[Bug libc/23915] [arm] __ASSUME_COPY_FILE_RANGE incorrect

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https://sourceware.org/bugzilla/show_bug.cgi?id=23915

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=1283c478aa0a9b3d84320db5745a61b7f61b360c

commit 1283c478aa0a9b3d84320db5745a61b7f61b360c
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Fri Nov 23 17:53:50 2018 +0000

    Fix Arm __ASSUME_COPY_FILE_RANGE (bug 23915).

    The generic kernel-features.h defines __ASSUME_COPY_FILE_RANGE for 4.5
    and later kernels.  However, for 32-bit Arm binaries running on 64-bit
    Arm kernels, the syscall was only wired up in the 4.7 kernel, although
    the 32-bit Arm kernel had the syscall from 4.5 onwards.  This patch
    corrects the Arm kernel-features.h to undefine the macro for
    configured minimum kernel versions before 4.7.

    Tested (compilation only) with a build-many-glibcs.py build for
    arm-linux-gnueabi.

        [BZ #23915]
        * sysdeps/unix/sysv/linux/arm/kernel-features.h
        [__LINUX_KERNEL_VERSION < 0x040700] (__ASSUME_COPY_FILE_RANGE):
        Undefine.

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog                                     |    7 +++++++
 sysdeps/unix/sysv/linux/arm/kernel-features.h |    7 ++++---
 2 files changed, 11 insertions(+), 3 deletions(-)

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