/*
* Copyright (c) 2020 Red Hat, Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*
* $Id: //eng/vdo-releases/aluminum/src/c++/vdo/kernel/workQueueHandle.c#2 $
*/
#include "workQueueHandle.h"
WorkQueueStackHandleGlobals workQueueStackHandleGlobals;
/**********************************************************************/
void initializeWorkQueueStackHandle(WorkQueueStackHandle *handle,
SimpleWorkQueue *queue)
{
handle->nonce = workQueueStackHandleGlobals.nonce;
handle->queue = queue;
long offset = (char *) handle - (char *) task_stack_page(current);
spin_lock(&workQueueStackHandleGlobals.offsetLock);
if (workQueueStackHandleGlobals.offset == 0) {
workQueueStackHandleGlobals.offset = offset;
spin_unlock(&workQueueStackHandleGlobals.offsetLock);
} else {
long foundOffset = workQueueStackHandleGlobals.offset;
spin_unlock(&workQueueStackHandleGlobals.offsetLock);
BUG_ON(foundOffset != offset);
}
}
/**********************************************************************/
void initWorkQueueStackHandleOnce(void)
{
spin_lock_init(&workQueueStackHandleGlobals.offsetLock);
workQueueStackHandleGlobals.nonce = currentTime(CLOCK_MONOTONIC);
}