[Bug libc/21780] hppa: p{read,write}v2 does not set ENOSUP on invalid flag

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https://sourceware.org/bugzilla/show_bug.cgi?id=21780

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=82efa1ffd43bed1494d20a4b86f6b15ac6bb5545

commit 82efa1ffd43bed1494d20a4b86f6b15ac6bb5545
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date:   Mon Jul 17 10:59:59 2017 -0300

    posix: Set p{read,write}v2 to return ENOTSUP (BZ#21780)

    Different than other architectures hppa-linux-gnu define different values
    for ENOTSUP and EOPNOTSUPP, where the later is a Linux specific one.
    This leads to tst-preadwritev{64}v2 tests failures:

    $ ./testrun.sh misc/tst-preadvwritev2
    error: tst-preadvwritev2-common.c:35: preadv2 failure did not set errno to
ENOTSUP (223)
    error: 1 test failures

    The straightforward fix is to return the POSIX defined ENOTSUP on all
    p{read,write}v{64}v2 implementations instead of Linux specific one.

    Checked on x86_64-linux-gnu and the tst-preadwritev{64}v2 on
    hppa-linux-gnu (although due the installed kernel on my testing system
    the pwritev{64}v2 with an invalid flag still fails due a known kernel
    issue [1]).

        [BZ #21780]
        * sysdeps/posix/preadv2.c (preadv2): Use ENOTSUP instead of
        EOPNOTSUPP.
        * sysdeps/posix/preadv64v2.c (preadv64v2): Likewise.
        * sysdeps/posix/pwritev2.c (pwritev2): Likewise.
        * sysdeps/posix/pwritev64v2.c (pwritev64v2): Likewise.
        * sysdeps/unix/sysv/linux/preadv2.c (preadv2): Likewise.
        * sysdeps/unix/sysv/linux/preadv64v2.c (preadv64v2): Likewise.
        * sysdeps/unix/sysv/linux/pwritev2.c (pwritev2): Likewise.
        * sysdeps/unix/sysv/linux/pwritev64v2.c (pwritev64v2): Likewise.

    [1] https://sourceware.org/ml/libc-alpha/2017-06/msg00726.html

    Cherry-pick of 852d63120783fae5bf85a067320dc4ba1ed59f11

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

Summary of changes:
 ChangeLog                             |   13 +++++++++++++
 sysdeps/posix/preadv2.c               |    2 +-
 sysdeps/posix/preadv64v2.c            |    2 +-
 sysdeps/posix/pwritev2.c              |    2 +-
 sysdeps/posix/pwritev64v2.c           |    2 +-
 sysdeps/unix/sysv/linux/preadv2.c     |    4 ++--
 sysdeps/unix/sysv/linux/preadv64v2.c  |    4 ++--
 sysdeps/unix/sysv/linux/pwritev2.c    |    4 ++--
 sysdeps/unix/sysv/linux/pwritev64v2.c |    4 ++--
 9 files changed, 25 insertions(+), 12 deletions(-)

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