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diff --git a/nuttx/sched/pg_miss.c b/nuttx/sched/pg_miss.c
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-/****************************************************************************
- * sched/pg_miss.c
- *
- *   Copyright (C) 2010 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 <errno.h>
-#include <debug.h>
-
-#include <nuttx/arch.h>
-#include <nuttx/sched.h>
-#include <nuttx/page.h>
-
-#ifdef CONFIG_PAGING
-
-#include "os_internal.h"
-#include "pg_internal.h"
-
-/****************************************************************************
- * Global Functions
- ****************************************************************************/
-
-/****************************************************************************
- * Name: pg_miss
- *
- * Description:
- *   This function is called from architecture-specific memory segmentation
- *   fault handling logic.  This function will perform the following
- *   operations:
- *
- *   1) Sanity checking.
- *      - ASSERT if the currently executing task is the page fill worker
- *        thread.  The page fill worker thread is how the the page fault
- *        is resolved and all logic associated with the page fill worker
- *        must be "locked" and always present in memory.
- *      - ASSERT if an interrupt was executing at the time of the exception.
- *   2) Block the currently executing task.
- *      - Call up_block_task() to block the task at the head of the ready-
- *        to-run list.  This should cause an interrupt level context switch
- *        to the next highest priority task.
- *      - The blocked task will be marked with state TSTATE_WAIT_PAGEFILL
- *        and will be retained in the g_waitingforfill prioritized task
- *        list.
- *   3) Boost the page fill worker thread priority.
- *      - Check the priority of the task at the head of the g_waitingforfill
- *        list.  If the priority of that task is higher than the current
- *        priority of the page fill worker thread, then boost the priority
- *        of the page fill worker thread to that priority.
- *   4) Signal the page fill worker thread.
- *      - Is there a page fill pending?  If not then signal the worker
- *        thread to start working on the queued page fill requests.
- *
- * Input Parameters:
- *   None - The head of the ready-to-run list is assumed to be task that
- *   caused the exception.
- *
- * Returned Value:
- *   None - Either this function function succeeds or an assertion occurs.
- *
- * Assumptions:
- *   - It is assumed that this function is called from the level of an
- *     exception handler and that all interrupts are disabled.
- *   - It is assumed that currently executing task (the one at the head of
- *     the ready-to-run list) is the one that cause the fault.  This will
- *     always be true unless the page fault occurred in an interrupt handler.
- *     Interrupt handling logic must always be present and "locked" into
- *     memory.
- *   - As mentioned above, the task causing the page fault must not be the
- *     page fill worker thread because that is the only way to complete the
- *     page fill.
- *
- * NOTES:
- *   1. One way to accomplish this would be a two pass link phase:
- *      - In the first phase, create a partially linked objected containing
- *        all interrupt/exception handling logic, the page fill worker thread
- *        plus all parts of the IDLE thread (which must always be available
- *        for execution).
- *      - All of the .text and .rodata sections of this partial link should
- *        be collected into a single section.
- *      - The second link would link the partially linked object along with
- *        the remaining object to produce the final binary.  The linker
- *        script should position the "special" section so that it lies
- *        in a reserved, "non-swappable" region.
- *
- ****************************************************************************/
-
-void pg_miss(void)
-{
-  FAR _TCB *ftcb = (FAR _TCB*)g_readytorun.head;
-  FAR _TCB *wtcb;
-
-  /* Sanity checking
-   *
-   * ASSERT if the currently executing task is the page fill worker thread.
-   * The page fill worker thread is how the the page fault is resolved and
-   * all logic associated with the page fill worker must be "locked" and
-   * always present in memory.
-   */
-
-  pglldbg("Blocking TCB: %p PID: %d\n", ftcb, ftcb->pid);
-  DEBUGASSERT(g_pgworker != ftcb->pid);
-
-  /* Block the currently executing task
-   * - Call up_block_task() to block the task at the head of the ready-
-   *   to-run list.  This should cause an interrupt level context switch
-   *   to the next highest priority task.
-   * - The blocked task will be marked with state TSTATE_WAIT_PAGEFILL
-   *   and will be retained in the g_waitingforfill prioritized task list.
-   */
-
-  up_block_task(ftcb, TSTATE_WAIT_PAGEFILL);
-
-  /* Boost the page fill worker thread priority.
-   * - Check the priority of the task at the head of the g_waitingforfill
-   *   list.  If the priority of that task is higher than the current
-   *   priority of the page fill worker thread, then boost the priority
-   *   of the page fill worker thread to that priority.
-   */
-
-  wtcb = sched_gettcb(g_pgworker);
-  DEBUGASSERT(wtcb != NULL);
-
-  if (wtcb->sched_priority < ftcb->sched_priority)
-    {
-      /* Reprioritize the page fill worker thread */
-
-      pgllvdbg("New worker priority. %d->%d\n",
-               wtcb->sched_priority, ftcb->sched_priority);
-      sched_setpriority(wtcb, ftcb->sched_priority);
-    }
-
-  /* Signal the page fill worker thread.
-   * - Is there a page fill pending?  If not then signal the worker
-   *   thread to start working on the queued page fill requests.
-   */
-
-  if (!g_pftcb)
-    {
-      pglldbg("Signaling worker. PID: %d\n", g_pgworker);
-      kill(g_pgworker, SIGWORK);
-    }
-}
-
-#endif /* CONFIG_PAGING */