[Bug libc/22742] [aarch64] mcontext_t __reserved field got renamed

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https://sourceware.org/bugzilla/show_bug.cgi?id=22742

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=c739e191d0697e29110d4eb446e537ff336324c6

commit c739e191d0697e29110d4eb446e537ff336324c6
Author: Szabolcs Nagy <szabolcs.nagy@arm.com>
Date:   Mon Jan 22 11:13:31 2018 +0000

    aarch64: Revert the change of the __reserved member of mcontext_t

    The uc_mcontext.__reserved member of ucontext_t is a user visible API,
    that should not be changed, because this is the only way to access cpu
    states of various extensions of linux asm/sigcontext.h, it does not
    violate namespace rules either, so revert this part of the commit

    commit 4fa9b3bfe6759c82beb4b043a54a3598ca467289
    Commit:     Joseph Myers <joseph@codesourcery.com>

        Fix mcontext_t sigcontext namespace (bug 21457).

    (In principle the user can type cast &uc_mcontext to struct sigcontext*
    to use the linux sigcontext fields, but that's not the existing practice
    since mcontext_t used to be a typedef of struct sigcontext.)

        [BZ #22742]
        * sysdeps/unix/sysv/linux/aarch64/sys/ucontext.h (__glibc_reserved1):
        Rename to __reserved and add comment.
        * sysdeps/unix/sysv/linux/aarch64/ucontext_i.sym (__glibc_reserved1):
        Rename to __reserved.

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

Summary of changes:
 ChangeLog                                      |    8 ++++++++
 sysdeps/unix/sysv/linux/aarch64/sys/ucontext.h |    6 +++++-
 sysdeps/unix/sysv/linux/aarch64/ucontext_i.sym |    2 +-
 3 files changed, 14 insertions(+), 2 deletions(-)

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