[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  <amacl...@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