Minor cleanup in __kmp_atfork_child()

This change removes the unnecessary lock operation on __kmp_initz_lock inside
the __kmp_atfork_child() function for Linux; the lock variable is initialized
in the same function later.

Patch by Hansang Bae

Differential Revision: https://reviews.llvm.org/D44949

llvm-svn: 328900

openmp/runtime/src/z_Linux_util.cpp

@@ -1267,7 +1267,6 @@ static void __kmp_atfork_parent(void) {
    clean data structures in initial states.  Don't worry about freeing memory
    allocated by parent, just abandon it to be safe. */
 static void __kmp_atfork_child(void) {
-  __kmp_release_bootstrap_lock(&__kmp_initz_lock);
   __kmp_release_bootstrap_lock(&__kmp_forkjoin_lock);
   /* TODO make sure this is done right for nested/sibling */
   // ATT:  Memory leaks are here? TODO: Check it and fix.