[Bug libstdc++/54861] std::atomic_signal_fence(std::memory_order_seq_cst) issues unnecessary mfence

[amacleod at redhat dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54861

--- Comment #4 from Andrew Macleod <amacleod at redhat dot com> 2012-10-10 20:47:48 UTC ---
Author: amacleod
Date: Wed Oct 10 20:47:39 2012
New Revision: 192332

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=192332
Log:

2012-10-10  Andrew MacLeod  <amacleod@redhat.com>

    PR libstdc++/54861
    * include/bits/atomic_base.h (atomic_signal_fence): Call
    __atomic_signal_fence instead of __atomic_thread_fence.


Modified:
    branches/gcc-4_7-branch/libstdc++-v3/ChangeLog
    branches/gcc-4_7-branch/libstdc++-v3/include/bits/atomic_base.h