1 files changed, 98 insertions, 0 deletions
diff --git a/lib/libspl/include/sys/sysmacros.h b/lib/libspl/include/sys/sysmacros.h
new file mode 100644
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+++ b/lib/libspl/include/sys/sysmacros.h
@@ -0,0 +1,98 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (the "License").  You may not use this file except in compliance
+ * with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef _LIBSPL_SYS_SYSMACROS_H
+#define _LIBSPL_SYS_SYSMACROS_H
+
+#include_next <sys/sysmacros.h>
+
+/* common macros */
+#ifndef MIN
+#define MIN(a, b)       ((a) < (b) ? (a) : (b))
+#endif
+#ifndef MAX
+#define MAX(a, b)       ((a) < (b) ? (b) : (a))
+#endif
+#ifndef ABS
+#define ABS(a)          ((a) < 0 ? -(a) : (a))
+#endif
+
+#define makedevice(maj,min)	makedev(maj,min)
+#define _sysconf(a)		sysconf(a)
+#define __NORETURN		__attribute__ ((noreturn))
+
+/*
+ * Compatibility macros/typedefs needed for Solaris -> Linux port
+ */
+#define P2ALIGN(x, align)	((x) & -(align))
+#define P2CROSS(x, y, align)	(((x) ^ (y)) > (align) - 1)
+#define P2ROUNDUP(x, align)	(-(-(x) & -(align)))
+#define P2ROUNDUP_TYPED(x, align, type) \
+				(-(-(type)(x) & -(type)(align)))
+#define P2BOUNDARY(off, len, align) \
+				(((off) ^ ((off) + (len) - 1)) > (align) - 1)
+#define P2PHASE(x, align)	((x) & ((align) - 1))
+#define P2NPHASE(x, align)	(-(x) & ((align) - 1))
+#define P2NPHASE_TYPED(x, align, type) \
+				(-(type)(x) & ((type)(align) - 1))
+#define ISP2(x)			(((x) & ((x) - 1)) == 0)
+#define IS_P2ALIGNED(v, a)	((((uintptr_t)(v)) & ((uintptr_t)(a) - 1)) == 0)
+
+/*
+ * Typed version of the P2* macros.  These macros should be used to ensure
+ * that the result is correctly calculated based on the data type of (x),
+ * which is passed in as the last argument, regardless of the data
+ * type of the alignment.  For example, if (x) is of type uint64_t,
+ * and we want to round it up to a page boundary using "PAGESIZE" as
+ * the alignment, we can do either
+ *      P2ROUNDUP(x, (uint64_t)PAGESIZE)
+ * or
+ *      P2ROUNDUP_TYPED(x, PAGESIZE, uint64_t)
+ */
+#define P2ALIGN_TYPED(x, align, type)   \
+        ((type)(x) & -(type)(align))
+#define P2PHASE_TYPED(x, align, type)   \
+        ((type)(x) & ((type)(align) - 1))
+#define P2NPHASE_TYPED(x, align, type)  \
+        (-(type)(x) & ((type)(align) - 1))
+#define P2ROUNDUP_TYPED(x, align, type) \
+        (-(-(type)(x) & -(type)(align)))
+#define P2END_TYPED(x, align, type)     \
+        (-(~(type)(x) & -(type)(align)))
+#define P2PHASEUP_TYPED(x, align, phase, type)  \
+        ((type)(phase) - (((type)(phase) - (type)(x)) & -(type)(align)))
+#define P2CROSS_TYPED(x, y, align, type)        \
+        (((type)(x) ^ (type)(y)) > (type)(align) - 1)
+#define P2SAMEHIGHBIT_TYPED(x, y, type) \
+        (((type)(x) ^ (type)(y)) < ((type)(x) & (type)(y)))
+
+
+/* avoid any possibility of clashing with <stddef.h> version */
+#if defined(_KERNEL) && !defined(_KMEMUSER) && !defined(offsetof)
+#define	offsetof(s, m)	((size_t)(&(((s *)0)->m)))
+#endif
+
+#endif /* _LIBSPL_SYS_SYSMACROS_H */