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+/*
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
+ * Copyright (C) 2002-2018 Aleph One Ltd.
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 2.1 as
+ * published by the Free Software Foundation.
+ *
+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
+ */
+
+#ifndef __YPORTENV_H__
+#define __YPORTENV_H__
+
+/*
+ * Define the MTD version in terms of Linux Kernel versions
+ * This allows yaffs to be used independantly of the kernel
+ * as well as with it.
+ */
+
+#define MTD_VERSION(a, b, c) (((a) << 16) + ((b) << 8) + (c))
+
+#ifdef YAFFS_OUT_OF_TREE
+#include "moduleconfig.h"
+#endif
+
+#include <linux/version.h>
+#define MTD_VERSION_CODE LINUX_VERSION_CODE
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
+#include <linux/config.h>
+#endif
+#include <linux/version.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/xattr.h>
+#include <linux/list.h>
+#include <linux/types.h>
+#include <linux/fs.h>
+#include <linux/stat.h>
+#include <linux/sort.h>
+#include <linux/bitops.h>
+
+/* These type wrappings are used to support Unicode names in WinCE. */
+#define YCHAR char
+#define YUCHAR unsigned char
+#define _Y(x) x
+
+#define YAFFS_LOSTNFOUND_NAME "lost+found"
+#define YAFFS_LOSTNFOUND_PREFIX "obj"
+
+
+#define YAFFS_ROOT_MODE 0755
+#define YAFFS_LOSTNFOUND_MODE 0700
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(4,12,0))
+#define Y_CURRENT_TIME ktime_get_real_seconds()
+#else
+#define Y_CURRENT_TIME ktime_get_real_seconds()
+#endif
+#define Y_TIME_CONVERT(x) (x).tv_sec
+#else
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(4,12,0))
+#define Y_CURRENT_TIME CURRENT_TIME
+#else
+#define Y_CURRENT_TIME current_kernel_time()
+#endif
+#define Y_TIME_CONVERT(x) (x)
+#endif
+
+#define compile_time_assertion(assertion) \
+ ({ int x = __builtin_choose_expr(assertion, 0, (void)0); (void) x; })
+
+
+#define yaffs_printf(msk, fmt, ...) \
+ printk(KERN_DEBUG "yaffs: " fmt "\n", ##__VA_ARGS__)
+
+#define yaffs_trace(msk, fmt, ...) do { \
+ if (yaffs_trace_mask & (msk)) \
+ printk(KERN_DEBUG "yaffs: " fmt "\n", ##__VA_ARGS__); \
+} while (0)
+
+
+#endif