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diff --git a/nuttx/sched/sched_removeblocked.c b/nuttx/sched/sched_removeblocked.c
new file mode 100644
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+++ b/nuttx/sched/sched_removeblocked.c
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+/************************************************************************
+ * sched/sched_removeblocked.c
+ *
+ *   Copyright (C) 2007, 2009 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 <queue.h>
+#include <assert.h>
+
+#include "os_internal.h"
+
+/************************************************************************
+ * Definitions
+ ************************************************************************/
+
+/************************************************************************
+ * Private Type Declarations
+ ************************************************************************/
+
+/************************************************************************
+ * Global Variables
+ ************************************************************************/
+
+/************************************************************************
+ * Private Variables
+ ************************************************************************/
+
+/************************************************************************
+ * Private Function Prototypes
+ ************************************************************************/
+
+/************************************************************************
+ * Public Functions
+ ************************************************************************/
+
+/************************************************************************
+ * Name: sched_removeblocked
+ *
+ * Description:
+ *   This function removes a TCB from one of the blocked state task
+ *   lists as inferred from the task_state inside the TCB.
+ *
+ * Inputs:
+ *   btcb - Points to the TCB that is blocked
+ *
+ * Return Value:
+ *   None
+ *
+ * Assumptions:
+ * - The caller has established a critical section before
+ *   calling this function.
+ *
+ ************************************************************************/
+
+void sched_removeblocked(FAR _TCB *btcb)
+{
+  tstate_t task_state = btcb->task_state;
+
+  /* Make sure the TCB is in a valid blocked state */
+
+  ASSERT(task_state >= FIRST_BLOCKED_STATE &&
+         task_state <= LAST_BLOCKED_STATE);
+
+  /* Remove the TCB from the blocked task list associated
+   * with this state
+   */
+
+  dq_rem((FAR dq_entry_t*)btcb, (dq_queue_t*)g_tasklisttable[task_state].list);
+
+  /* Make sure the TCB's state corresponds to not being in
+   * any list
+   */
+
+  btcb->task_state = TSTATE_TASK_INVALID;
+}
+