--- a/hotspot/src/os/linux/vm/os_linux.cpp	Tue May 12 13:17:54 2015 -0700
+++ b/hotspot/src/os/linux/vm/os_linux.cpp	Tue May 12 20:55:40 2015 -0400
@@ -5878,14 +5878,6 @@
 
 extern char** environ;
 
-#ifndef __NR_fork
-  #define __NR_fork IA32_ONLY(2) IA64_ONLY(not defined) AMD64_ONLY(57) AARCH64_ONLY(1079)
-#endif
-
-#ifndef __NR_execve
-  #define __NR_execve IA32_ONLY(11) IA64_ONLY(1033) AMD64_ONLY(59) AARCH64_ONLY(221)
-#endif
-
 // Run the specified command in a separate process. Return its exit value,
 // or -1 on failure (e.g. can't fork a new process).
 // Unlike system(), this function can be called from signal handler. It
@@ -5893,13 +5885,7 @@
 int os::fork_and_exec(char* cmd) {
   const char * argv[4] = {"sh", "-c", cmd, NULL};
 
-  // fork() in LinuxThreads/NPTL is not async-safe. It needs to run
-  // pthread_atfork handlers and reset pthread library. All we need is a
-  // separate process to execve. Make a direct syscall to fork process.
-  // On IA64 there's no fork syscall, we have to use fork() and hope for
-  // the best...
-  pid_t pid = NOT_IA64(syscall(__NR_fork);)
-  IA64_ONLY(fork();)
+  pid_t pid = fork();
 
   if (pid < 0) {
     // fork failed
@@ -5908,15 +5894,7 @@
   } else if (pid == 0) {
     // child process
 
-    // execve() in LinuxThreads will call pthread_kill_other_threads_np()
-    // first to kill every thread on the thread list. Because this list is
-    // not reset by fork() (see notes above), execve() will instead kill
-    // every thread in the parent process. We know this is the only thread
-    // in the new process, so make a system call directly.
-    // IA64 should use normal execve() from glibc to match the glibc fork()
-    // above.
-    NOT_IA64(syscall(__NR_execve, "/bin/sh", argv, environ);)
-    IA64_ONLY(execve("/bin/sh", (char* const*)argv, environ);)
+    execve("/bin/sh", (char* const*)argv, environ);
 
     // execve failed
     _exit(-1);