commit 673659263d956f45f1ce0c66900fa7f1129db74a

Author: Stefan Liebler <stli@linux.vnet.ibm.com>

Date:   Mon May 26 11:14:25 2014 +0200

    Disable lock elision for PTHREAD_MUTEX_NORMAL.

Index: glibc-2.17-c758a686/nptl/pthread_mutexattr_settype.c

===================================================================

--- glibc-2.17-c758a686.orig/nptl/pthread_mutexattr_settype.c

+++ glibc-2.17-c758a686/nptl/pthread_mutexattr_settype.c

@@ -32,7 +32,7 @@ __pthread_mutexattr_settype (attr, kind)

   /* Cannot distinguish between DEFAULT and NORMAL. So any settype

      call disables elision for now.  */

-  if (kind == PTHREAD_MUTEX_DEFAULT)

+  if (kind == PTHREAD_MUTEX_NORMAL)

     kind |= PTHREAD_MUTEX_NO_ELISION_NP;

   iattr = (struct pthread_mutexattr *) attr;