# HG changeset patch
# User redestad
# Date 1571148156 -7200
#      Tue Oct 15 16:02:36 2019 +0200
# Node ID 8d2589f12322009c0d20651deb26406a4b7086f9
# Parent  cd9c4e6aa6310ce32b26bd2584b0b6b461743d2b
8232211: Remove dead code from os.hpp|cpp
Reviewed-by: TBD

diff --git a/src/hotspot/os/aix/os_aix.cpp b/src/hotspot/os/aix/os_aix.cpp
--- a/src/hotspot/os/aix/os_aix.cpp
+++ b/src/hotspot/os/aix/os_aix.cpp
@@ -1034,8 +1034,6 @@
 }
 
 bool os::supports_vtime() { return true; }
-bool os::enable_vtime()   { return false; }
-bool os::vtime_enabled()  { return false; }
 
 double os::elapsedVTime() {
   struct rusage usage;
@@ -3606,11 +3604,6 @@
   return;
 }
 
-bool os::distribute_processes(uint length, uint* distribution) {
-  // Not yet implemented.
-  return false;
-}
-
 bool os::bind_to_processor(uint processor_id) {
   // Not yet implemented.
   return false;
diff --git a/src/hotspot/os/aix/os_aix.inline.hpp b/src/hotspot/os/aix/os_aix.inline.hpp
--- a/src/hotspot/os/aix/os_aix.inline.hpp
+++ b/src/hotspot/os/aix/os_aix.inline.hpp
@@ -64,8 +64,6 @@
   ::dlclose(lib);
 }
 
-inline const int os::default_file_open_flags() { return 0;}
-
 inline jlong os::lseek(int fd, jlong offset, int whence) {
   return (jlong) ::lseek64(fd, offset, whence);
 }
diff --git a/src/hotspot/os/bsd/os_bsd.cpp b/src/hotspot/os/bsd/os_bsd.cpp
--- a/src/hotspot/os/bsd/os_bsd.cpp
+++ b/src/hotspot/os/bsd/os_bsd.cpp
@@ -877,8 +877,6 @@
 }
 
 bool os::supports_vtime() { return true; }
-bool os::enable_vtime()   { return false; }
-bool os::vtime_enabled()  { return false; }
 
 double os::elapsedVTime() {
   // better than nothing, but not much
@@ -3282,11 +3280,6 @@
 #endif
 }
 
-bool os::distribute_processes(uint length, uint* distribution) {
-  // Not yet implemented.
-  return false;
-}
-
 bool os::bind_to_processor(uint processor_id) {
   // Not yet implemented.
   return false;
diff --git a/src/hotspot/os/bsd/os_bsd.inline.hpp b/src/hotspot/os/bsd/os_bsd.inline.hpp
--- a/src/hotspot/os/bsd/os_bsd.inline.hpp
+++ b/src/hotspot/os/bsd/os_bsd.inline.hpp
@@ -67,8 +67,6 @@
   ::dlclose(lib);
 }
 
-inline const int os::default_file_open_flags() { return 0;}
-
 inline jlong os::lseek(int fd, jlong offset, int whence) {
   return (jlong) ::lseek(fd, offset, whence);
 }
diff --git a/src/hotspot/os/linux/os_linux.cpp b/src/hotspot/os/linux/os_linux.cpp
--- a/src/hotspot/os/linux/os_linux.cpp
+++ b/src/hotspot/os/linux/os_linux.cpp
@@ -1364,8 +1364,6 @@
 }
 
 bool os::supports_vtime() { return true; }
-bool os::enable_vtime()   { return false; }
-bool os::vtime_enabled()  { return false; }
 
 double os::elapsedVTime() {
   struct rusage usage;
@@ -4860,11 +4858,6 @@
   return _os_version & 0x00FFFFFF;
 }
 
-bool os::Linux::os_version_is_known() {
-  assert(_os_version != 0, "not initialized");
-  return _os_version & 0x01000000 ? false : true;
-}
-
 /////
 // glibc on Linux platform uses non-documented flag
 // to indicate, that some special sort of signal
@@ -5465,11 +5458,6 @@
   }
 }
 
-bool os::distribute_processes(uint length, uint* distribution) {
-  // Not yet implemented.
-  return false;
-}
-
 bool os::bind_to_processor(uint processor_id) {
   // Not yet implemented.
   return false;
diff --git a/src/hotspot/os/linux/os_linux.hpp b/src/hotspot/os/linux/os_linux.hpp
--- a/src/hotspot/os/linux/os_linux.hpp
+++ b/src/hotspot/os/linux/os_linux.hpp
@@ -196,7 +196,6 @@
 
   // Stack overflow handling
   static bool manually_expand_stack(JavaThread * t, address addr);
-  static int max_register_window_saves_before_flushing();
 
   // fast POSIX clocks support
   static void fast_thread_clock_init(void);
@@ -212,7 +211,6 @@
   static jlong fast_thread_cpu_time(clockid_t clockid);
 
   static void initialize_os_info();
-  static bool os_version_is_known();
   static uint32_t os_version();
 
   // Stack repair handling
diff --git a/src/hotspot/os/linux/os_linux.inline.hpp b/src/hotspot/os/linux/os_linux.inline.hpp
--- a/src/hotspot/os/linux/os_linux.inline.hpp
+++ b/src/hotspot/os/linux/os_linux.inline.hpp
@@ -59,8 +59,6 @@
   ::dlclose(lib);
 }
 
-inline const int os::default_file_open_flags() { return 0;}
-
 inline jlong os::lseek(int fd, jlong offset, int whence) {
   return (jlong) ::lseek64(fd, offset, whence);
 }
diff --git a/src/hotspot/os/posix/os_posix.cpp b/src/hotspot/os/posix/os_posix.cpp
--- a/src/hotspot/os/posix/os_posix.cpp
+++ b/src/hotspot/os/posix/os_posix.cpp
@@ -167,11 +167,6 @@
   return n;
 }
 
-bool os::is_debugger_attached() {
-  // not implemented
-  return false;
-}
-
 void os::wait_for_keypress_at_exit(void) {
   // don't do anything on posix platforms
   return;
diff --git a/src/hotspot/os/solaris/os_solaris.cpp b/src/hotspot/os/solaris/os_solaris.cpp
--- a/src/hotspot/os/solaris/os_solaris.cpp
+++ b/src/hotspot/os/solaris/os_solaris.cpp
@@ -265,8 +265,6 @@
   }
 }
 
-static int _processors_online = 0;
-
 jint os::Solaris::_os_thread_limit = 0;
 volatile jint os::Solaris::_os_thread_count = 0;
 
@@ -291,7 +289,6 @@
 
 void os::Solaris::initialize_system_info() {
   set_processor_count(sysconf(_SC_NPROCESSORS_CONF));
-  _processors_online = sysconf(_SC_NPROCESSORS_ONLN);
   _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) *
                                      (julong)sysconf(_SC_PAGESIZE);
 }
@@ -320,7 +317,6 @@
     // Query the number of cpus available to us.
     if (pset_info(pset, NULL, &pset_cpus, NULL) == 0) {
       assert(pset_cpus > 0 && pset_cpus <= online_cpus, "sanity check");
-      _processors_online = pset_cpus;
       return pset_cpus;
     }
   }
@@ -328,136 +324,6 @@
   return online_cpus;
 }
 
-static bool find_processors_in_pset(psetid_t        pset,
-                                    processorid_t** id_array,
-                                    uint_t*         id_length) {
-  bool result = false;
-  // Find the number of processors in the processor set.
-  if (pset_info(pset, NULL, id_length, NULL) == 0) {
-    // Make up an array to hold their ids.
-    *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal);
-    // Fill in the array with their processor ids.
-    if (pset_info(pset, NULL, id_length, *id_array) == 0) {
-      result = true;
-    }
-  }
-  return result;
-}
-
-// Callers of find_processors_online() must tolerate imprecise results --
-// the system configuration can change asynchronously because of DR
-// or explicit psradm operations.
-//
-// We also need to take care that the loop (below) terminates as the
-// number of processors online can change between the _SC_NPROCESSORS_ONLN
-// request and the loop that builds the list of processor ids.   Unfortunately
-// there's no reliable way to determine the maximum valid processor id,
-// so we use a manifest constant, MAX_PROCESSOR_ID, instead.  See p_online
-// man pages, which claim the processor id set is "sparse, but
-// not too sparse".  MAX_PROCESSOR_ID is used to ensure that we eventually
-// exit the loop.
-//
-// In the future we'll be able to use sysconf(_SC_CPUID_MAX), but that's
-// not available on S8.0.
-
-static bool find_processors_online(processorid_t** id_array,
-                                   uint*           id_length) {
-  const processorid_t MAX_PROCESSOR_ID = 100000;
-  // Find the number of processors online.
-  *id_length = sysconf(_SC_NPROCESSORS_ONLN);
-  // Make up an array to hold their ids.
-  *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal);
-  // Processors need not be numbered consecutively.
-  long found = 0;
-  processorid_t next = 0;
-  while (found < *id_length && next < MAX_PROCESSOR_ID) {
-    processor_info_t info;
-    if (processor_info(next, &info) == 0) {
-      // NB, PI_NOINTR processors are effectively online ...
-      if (info.pi_state == P_ONLINE || info.pi_state == P_NOINTR) {
-        (*id_array)[found] = next;
-        found += 1;
-      }
-    }
-    next += 1;
-  }
-  if (found < *id_length) {
-    // The loop above didn't identify the expected number of processors.
-    // We could always retry the operation, calling sysconf(_SC_NPROCESSORS_ONLN)
-    // and re-running the loop, above, but there's no guarantee of progress
-    // if the system configuration is in flux.  Instead, we just return what
-    // we've got.  Note that in the worst case find_processors_online() could
-    // return an empty set.  (As a fall-back in the case of the empty set we
-    // could just return the ID of the current processor).
-    *id_length = found;
-  }
-
-  return true;
-}
-
-static bool assign_distribution(processorid_t* id_array,
-                                uint           id_length,
-                                uint*          distribution,
-                                uint           distribution_length) {
-  // We assume we can assign processorid_t's to uint's.
-  assert(sizeof(processorid_t) == sizeof(uint),
-         "can't convert processorid_t to uint");
-  // Quick check to see if we won't succeed.
-  if (id_length < distribution_length) {
-    return false;
-  }
-  // Assign processor ids to the distribution.
-  // Try to shuffle processors to distribute work across boards,
-  // assuming 4 processors per board.
-  const uint processors_per_board = ProcessDistributionStride;
-  // Find the maximum processor id.
-  processorid_t max_id = 0;
-  for (uint m = 0; m < id_length; m += 1) {
-    max_id = MAX2(max_id, id_array[m]);
-  }
-  // The next id, to limit loops.
-  const processorid_t limit_id = max_id + 1;
-  // Make up markers for available processors.
-  bool* available_id = NEW_C_HEAP_ARRAY(bool, limit_id, mtInternal);
-  for (uint c = 0; c < limit_id; c += 1) {
-    available_id[c] = false;
-  }
-  for (uint a = 0; a < id_length; a += 1) {
-    available_id[id_array[a]] = true;
-  }
-  // Step by "boards", then by "slot", copying to "assigned".
-  // NEEDS_CLEANUP: The assignment of processors should be stateful,
-  //                remembering which processors have been assigned by
-  //                previous calls, etc., so as to distribute several
-  //                independent calls of this method.  What we'd like is
-  //                It would be nice to have an API that let us ask
-  //                how many processes are bound to a processor,
-  //                but we don't have that, either.
-  //                In the short term, "board" is static so that
-  //                subsequent distributions don't all start at board 0.
-  static uint board = 0;
-  uint assigned = 0;
-  // Until we've found enough processors ....
-  while (assigned < distribution_length) {
-    // ... find the next available processor in the board.
-    for (uint slot = 0; slot < processors_per_board; slot += 1) {
-      uint try_id = board * processors_per_board + slot;
-      if ((try_id < limit_id) && (available_id[try_id] == true)) {
-        distribution[assigned] = try_id;
-        available_id[try_id] = false;
-        assigned += 1;
-        break;
-      }
-    }
-    board += 1;
-    if (board * processors_per_board + 0 >= limit_id) {
-      board = 0;
-    }
-  }
-  FREE_C_HEAP_ARRAY(bool, available_id);
-  return true;
-}
-
 void os::set_native_thread_name(const char *name) {
   if (Solaris::_pthread_setname_np != NULL) {
     // Only the first 31 bytes of 'name' are processed by pthread_setname_np
@@ -470,31 +336,6 @@
   }
 }
 
-bool os::distribute_processes(uint length, uint* distribution) {
-  bool result = false;
-  // Find the processor id's of all the available CPUs.
-  processorid_t* id_array  = NULL;
-  uint           id_length = 0;
-  // There are some races between querying information and using it,
-  // since processor sets can change dynamically.
-  psetid_t pset = PS_NONE;
-  // Are we running in a processor set?
-  if ((pset_bind(PS_QUERY, P_PID, P_MYID, &pset) == 0) && pset != PS_NONE) {
-    result = find_processors_in_pset(pset, &id_array, &id_length);
-  } else {
-    result = find_processors_online(&id_array, &id_length);
-  }
-  if (result == true) {
-    if (id_length >= length) {
-      result = assign_distribution(id_array, id_length, distribution, length);
-    } else {
-      result = false;
-    }
-  }
-  FREE_C_HEAP_ARRAY(processorid_t, id_array);
-  return result;
-}
-
 bool os::bind_to_processor(uint processor_id) {
   // We assume that a processorid_t can be stored in a uint.
   assert(sizeof(uint) == sizeof(processorid_t),
@@ -1237,8 +1078,6 @@
 }
 
 bool os::supports_vtime() { return true; }
-bool os::enable_vtime() { return false; }
-bool os::vtime_enabled() { return false; }
 
 double os::elapsedVTime() {
   return (double)gethrvtime() / (double)hrtime_hz;
diff --git a/src/hotspot/os/solaris/os_solaris.hpp b/src/hotspot/os/solaris/os_solaris.hpp
--- a/src/hotspot/os/solaris/os_solaris.hpp
+++ b/src/hotspot/os/solaris/os_solaris.hpp
@@ -271,10 +271,6 @@
 
   static void correct_stack_boundaries_for_primordial_thread(Thread* thr);
 
-  // Stack overflow handling
-
-  static int max_register_window_saves_before_flushing();
-
   // Stack repair handling
 
   // none present
diff --git a/src/hotspot/os/solaris/os_solaris.inline.hpp b/src/hotspot/os/solaris/os_solaris.inline.hpp
--- a/src/hotspot/os/solaris/os_solaris.inline.hpp
+++ b/src/hotspot/os/solaris/os_solaris.inline.hpp
@@ -61,8 +61,6 @@
 
 inline void os::dll_unload(void *lib) { ::dlclose(lib); }
 
-inline const int os::default_file_open_flags() { return 0;}
-
 //////////////////////////////////////////////////////////////////////////////
 ////////////////////////////////////////////////////////////////////////////////
 
diff --git a/src/hotspot/os/windows/os_windows.cpp b/src/hotspot/os/windows/os_windows.cpp
--- a/src/hotspot/os/windows/os_windows.cpp
+++ b/src/hotspot/os/windows/os_windows.cpp
@@ -826,11 +826,6 @@
   } __except(EXCEPTION_EXECUTE_HANDLER) {}
 }
 
-bool os::distribute_processes(uint length, uint* distribution) {
-  // Not yet implemented.
-  return false;
-}
-
 bool os::bind_to_processor(uint processor_id) {
   // Not yet implemented.
   return false;
@@ -911,8 +906,6 @@
 }
 
 bool os::supports_vtime() { return true; }
-bool os::enable_vtime() { return false; }
-bool os::vtime_enabled() { return false; }
 
 double os::elapsedVTime() {
   FILETIME created;
@@ -3904,12 +3897,6 @@
   _setmode(_fileno(stderr), _O_BINARY);
 }
 
-
-bool os::is_debugger_attached() {
-  return IsDebuggerPresent() ? true : false;
-}
-
-
 void os::wait_for_keypress_at_exit(void) {
   if (PauseAtExit) {
     fprintf(stderr, "Press any key to continue...\n");
diff --git a/src/hotspot/os/windows/os_windows.inline.hpp b/src/hotspot/os/windows/os_windows.inline.hpp
--- a/src/hotspot/os/windows/os_windows.inline.hpp
+++ b/src/hotspot/os/windows/os_windows.inline.hpp
@@ -30,8 +30,6 @@
 
 inline const char* os::dll_file_extension()            { return ".dll"; }
 
-inline const int os::default_file_open_flags() { return O_BINARY | O_NOINHERIT;}
-
 inline void  os::dll_unload(void *lib) {
   ::FreeLibrary((HMODULE)lib);
 }
diff --git a/src/hotspot/os_cpu/solaris_sparc/os_solaris_sparc.cpp b/src/hotspot/os_cpu/solaris_sparc/os_solaris_sparc.cpp
--- a/src/hotspot/os_cpu/solaris_sparc/os_solaris_sparc.cpp
+++ b/src/hotspot/os_cpu/solaris_sparc/os_solaris_sparc.cpp
@@ -86,12 +86,6 @@
 size_t os::Posix::_java_thread_min_stack_allowed = 86 * K;
 size_t os::Posix::_vm_internal_thread_min_stack_allowed = 128 * K;
 
-int os::Solaris::max_register_window_saves_before_flushing() {
-  // We should detect this at run time. For now, filling
-  // in with a constant.
-  return 8;
-}
-
 static void handle_unflushed_register_windows(gwindows_t *win) {
   int restore_count = win->wbcnt;
   int i;
diff --git a/src/hotspot/share/gc/g1/g1CollectedHeap.cpp b/src/hotspot/share/gc/g1/g1CollectedHeap.cpp
--- a/src/hotspot/share/gc/g1/g1CollectedHeap.cpp
+++ b/src/hotspot/share/gc/g1/g1CollectedHeap.cpp
@@ -1630,7 +1630,6 @@
 }
 
 jint G1CollectedHeap::initialize() {
-  os::enable_vtime();
 
   // Necessary to satisfy locking discipline assertions.
 
diff --git a/src/hotspot/share/runtime/os.hpp b/src/hotspot/share/runtime/os.hpp
--- a/src/hotspot/share/runtime/os.hpp
+++ b/src/hotspot/share/runtime/os.hpp
@@ -47,8 +47,6 @@
 // OS services (time, I/O) as well as other functionality with system-
 // dependent code.
 
-typedef void (*dll_func)(...);
-
 class Thread;
 class JavaThread;
 class NativeCallStack;
@@ -195,14 +193,9 @@
 
   // The "virtual time" of a thread is the amount of time a thread has
   // actually run.  The first function indicates whether the OS supports
-  // this functionality for the current thread, and if so:
-  //   * the second enables vtime tracking (if that is required).
-  //   * the third tells whether vtime is enabled.
-  //   * the fourth returns the elapsed virtual time for the current
-  //     thread.
+  // this functionality for the current thread, and if so the second
+  // returns the elapsed virtual time for the current thread.
   static bool supports_vtime();
-  static bool enable_vtime();
-  static bool vtime_enabled();
   static double elapsedVTime();
 
   // Return current local time in a string (YYYY-MM-DD HH:MM:SS).
@@ -254,14 +247,6 @@
     return _initial_active_processor_count;
   }
 
-  // Bind processes to processors.
-  //     This is a two step procedure:
-  //     first you generate a distribution of processes to processors,
-  //     then you bind processes according to that distribution.
-  // Compute a distribution for number of processes to processors.
-  //    Stores the processor id's into the distribution array argument.
-  //    Returns true if it worked, false if it didn't.
-  static bool distribute_processes(uint length, uint* distribution);
   // Binds the current process to a processor.
   //    Returns true if it worked, false if it didn't.
   static bool bind_to_processor(uint processor_id);
@@ -496,7 +481,6 @@
   static void verify_stack_alignment() PRODUCT_RETURN;
 
   static bool message_box(const char* title, const char* message);
-  static char* do_you_want_to_debug(const char* message);
 
   // run cmd in a separate process and return its exit code; or -1 on failures
   static int fork_and_exec(char *cmd, bool use_vfork_if_available = false);
@@ -520,7 +504,6 @@
   static void die();
 
   // File i/o operations
-  static const int default_file_open_flags();
   static int open(const char *path, int oflag, int mode);
   static FILE* open(int fd, const char* mode);
   static FILE* fopen(const char* path, const char* mode);
@@ -668,9 +651,6 @@
   // Will not change the value of errno.
   static const char* errno_name(int e);
 
-  // Determines whether the calling process is being debugged by a user-mode debugger.
-  static bool is_debugger_attached();
-
   // wait for a key press if PauseAtExit is set
   static void wait_for_keypress_at_exit(void);
 
@@ -966,10 +946,6 @@
       return _state == SR_RUNNING;
     }
 
-    bool is_suspend_request() const {
-      return _state == SR_SUSPEND_REQUEST;
-    }
-
     bool is_suspended() const {
       return _state == SR_SUSPENDED;
     }
# HG changeset patch
# User redestad
# Date 1571148178 -7200
#      Tue Oct 15 16:02:58 2019 +0200
# Node ID 85c613588d1e71c9f2258737d6e45a1a012f66ea
# Parent  8d2589f12322009c0d20651deb26406a4b7086f9
imported patch dead_os2

diff --git a/src/hotspot/os/aix/os_aix.hpp b/src/hotspot/os/aix/os_aix.hpp
--- a/src/hotspot/os/aix/os_aix.hpp
+++ b/src/hotspot/os/aix/os_aix.hpp
@@ -44,7 +44,6 @@
 
   static julong _physical_memory;
   static pthread_t _main_thread;
-  static Mutex* _createThread_lock;
   static int _page_size;
 
   // -1 = uninitialized, 0 = AIX, 1 = OS/400 (PASE)
@@ -90,8 +89,6 @@
  public:
   static void init_thread_fpu_state();
   static pthread_t main_thread(void)                                { return _main_thread; }
-  static void set_createThread_lock(Mutex* lk)                      { _createThread_lock = lk; }
-  static Mutex* createThread_lock(void)                             { return _createThread_lock; }
   static void hotspot_sigmask(Thread* thread);
 
   // Given an address, returns the size of the page backing that address
diff --git a/src/hotspot/os/linux/os_linux.cpp b/src/hotspot/os/linux/os_linux.cpp
--- a/src/hotspot/os/linux/os_linux.cpp
+++ b/src/hotspot/os/linux/os_linux.cpp
@@ -148,11 +148,9 @@
 
 int (*os::Linux::_pthread_getcpuclockid)(pthread_t, clockid_t *) = NULL;
 int (*os::Linux::_pthread_setname_np)(pthread_t, const char*) = NULL;
-Mutex* os::Linux::_createThread_lock = NULL;
 pthread_t os::Linux::_main_thread;
 int os::Linux::_page_size = -1;
 bool os::Linux::_supports_fast_thread_cpu_time = false;
-uint32_t os::Linux::_os_version = 0;
 const char * os::Linux::_glibc_version = NULL;
 const char * os::Linux::_libpthread_version = NULL;
 
@@ -4821,43 +4819,6 @@
   return (tp.tv_sec * NANOSECS_PER_SEC) + tp.tv_nsec;
 }
 
-void os::Linux::initialize_os_info() {
-  assert(_os_version == 0, "OS info already initialized");
-
-  struct utsname _uname;
-
-  uint32_t major;
-  uint32_t minor;
-  uint32_t fix;
-
-  int rc;
-
-  // Kernel version is unknown if
-  // verification below fails.
-  _os_version = 0x01000000;
-
-  rc = uname(&_uname);
-  if (rc != -1) {
-
-    rc = sscanf(_uname.release,"%d.%d.%d", &major, &minor, &fix);
-    if (rc == 3) {
-
-      if (major < 256 && minor < 256 && fix < 256) {
-        // Kernel version format is as expected,
-        // set it overriding unknown state.
-        _os_version = (major << 16) |
-                      (minor << 8 ) |
-                      (fix   << 0 ) ;
-      }
-    }
-  }
-}
-
-uint32_t os::Linux::os_version() {
-  assert(_os_version != 0, "not initialized");
-  return _os_version & 0x00FFFFFF;
-}
-
 /////
 // glibc on Linux platform uses non-documented flag
 // to indicate, that some special sort of signal
@@ -5077,8 +5038,6 @@
 
   Linux::initialize_system_info();
 
-  Linux::initialize_os_info();
-
   os::Linux::CPUPerfTicks pticks;
   bool res = os::Linux::get_tick_information(&pticks, -1);
 
@@ -5255,9 +5214,6 @@
     }
   }
 
-  // Initialize lock used to serialize thread creation (see os::create_thread)
-  Linux::set_createThread_lock(new Mutex(Mutex::leaf, "createThread_lock", false));
-
   // at-exit methods are called in the reverse order of their registration.
   // atexit functions are called on return from main or as a result of a
   // call to exit(3C). There can be only 32 of these functions registered
diff --git a/src/hotspot/os/linux/os_linux.hpp b/src/hotspot/os/linux/os_linux.hpp
--- a/src/hotspot/os/linux/os_linux.hpp
+++ b/src/hotspot/os/linux/os_linux.hpp
@@ -55,20 +55,10 @@
   static GrowableArray<int>* _cpu_to_node;
   static GrowableArray<int>* _nindex_to_node;
 
-  // 0x00000000 = uninitialized,
-  // 0x01000000 = kernel version unknown,
-  // otherwise a 32-bit number:
-  // Ox00AABBCC
-  // AA, Major Version
-  // BB, Minor Version
-  // CC, Fix   Version
-  static uint32_t _os_version;
-
  protected:
 
   static julong _physical_memory;
   static pthread_t _main_thread;
-  static Mutex* _createThread_lock;
   static int _page_size;
 
   static julong available_memory();
@@ -136,8 +126,6 @@
   // returns kernel thread id (similar to LWP id on Solaris), which can be
   // used to access /proc
   static pid_t gettid();
-  static void set_createThread_lock(Mutex* lk)                      { _createThread_lock = lk; }
-  static Mutex* createThread_lock(void)                             { return _createThread_lock; }
   static void hotspot_sigmask(Thread* thread);
 
   static address   initial_thread_stack_bottom(void)                { return _initial_thread_stack_bottom; }
@@ -210,9 +198,6 @@
 
   static jlong fast_thread_cpu_time(clockid_t clockid);
 
-  static void initialize_os_info();
-  static uint32_t os_version();
-
   // Stack repair handling
 
   // none present