Import DPAA driver snapshot

Imported from Freescale Linux repository

git://git.freescale.com/ppc/upstream/linux.git

commit 2774c204cd8bfc56a200ff4dcdfc9cdf5b6fc161.

Linux compatibility layer is partly from FreeBSD.

rtemsbsd/powerpc/include/linux/err.h

@@ -0,0 +1,84 @@
+/*
+ * Copyright (c) 2015 embedded brains GmbH
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * 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.
+ */
+
+#ifndef _LINUX_ERR_H
+#define	_LINUX_ERR_H
+
+#include <linux/compiler.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+#define IS_ERR_VALUE(e) unlikely((e) >= (unsigned long)-4095)
+
+static inline void *
+__must_check ERR_PTR(long e)
+{
+
+	return ((void *)e);
+}
+
+static inline long __must_check
+PTR_ERR(__force const void *p)
+{
+
+	return ((long)p);
+}
+
+static inline bool __must_check
+IS_ERR(__force const void *p)
+{
+
+	return (IS_ERR_VALUE((unsigned long)p));
+}
+
+static inline bool __must_check
+IS_ERR_OR_NULL(__force const void *p)
+{
+
+	return (p == NULL || IS_ERR_VALUE((unsigned long)p));
+}
+
+static inline void * __must_check
+ERR_CAST(__force const void *p)
+{
+
+	return (__DECONST(void *, p));
+}
+
+static inline int __must_check
+PTR_ERR_OR_ZERO(__force const void *p)
+{
+
+	return (IS_ERR(p) ? (int)PTR_ERR(p) : 0);
+}
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* _LINUX_ERR_H */