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diff --git a/nuttx/mm/shm/shm_initialize.c b/nuttx/mm/shm/shm_initialize.c
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index 000000000..1da2d4e2e
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+++ b/nuttx/mm/shm/shm_initialize.c
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+/****************************************************************************
+ * mm/shm/shm_initialize.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include "shm/shm.h"
+
+#ifdef CONFIG_MM_SHM
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+/* State of the all shared memory */
+
+struct shm_info_s g_shminfo;
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: shm_initialize
+ *
+ * Description:
+ *   Perform one time, start-up initialization of the shared memor logic.
+ *
+ * Input Parameters:
+ *   None
+ *
+ * Returned Value:
+ *   None
+ *
+ ****************************************************************************/
+
+void shm_initialize(void)
+{
+#if SHM_INVALID_KEY != 0
+  FAR struct shm_region_s *region;
+  int i;
+#endif
+
+  /* Initialize the shared memory region list */
+
+  sem_init(&g_shminfo.si_sem, 0, 1);
+
+#if SHM_INVALID_KEY != 0
+  /* Initialize each shared memory region */
+
+  for (i = 0; i < CONFIG_ARCH_SHM_NPAGES; i++)
+    {
+      region = &g_shminfo.si_region[i];
+
+      /* Markk the key invalid for each region.  The invalid key is an
+       * indication that the region is not in use.
+       */
+
+      region->sr_key = SHM_INVALID_KEY;
+    }
+#endif
+}
+
+#endif /* CONFIG_MM_SHM */