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[Bug nptl/16892] Invalid futex demotion in __lll_timedlock


https://sourceware.org/bugzilla/show_bug.cgi?id=16892

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=4e75751cbbd47242946f817111066f511dbba739

commit 4e75751cbbd47242946f817111066f511dbba739
Author: Bernard Ogden <bernie.ogden@linaro.org>
Date:   Mon Aug 11 15:26:48 2014 +0100

    Check value of futex before updating in __lll_timedlock

    2014-08-12  Bernard Ogden  <bernie.ogden@linaro.org>

        [BZ #16892]
        * sysdeps/nptl/lowlevellock.h (__lll_timedlock): Use
        atomic_compare_and_exchange_bool_acq rather than atomic_exchange_acq.

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

Summary of changes:
 ChangeLog                   |    6 ++++++
 sysdeps/nptl/lowlevellock.h |    5 ++++-
 2 files changed, 10 insertions(+), 1 deletions(-)

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