1 files changed, 60 insertions, 0 deletions
diff --git a/sys/ofed/include/linux/log2.h b/sys/ofed/include/linux/log2.h
new file mode 100644
index 0000000..0a8315a
--- /dev/null
+++ b/sys/ofed/include/linux/log2.h
@@ -0,0 +1,60 @@
+/*-
+ * Copyright (c) 2010 Isilon Systems, Inc.
+ * Copyright (c) 2010 iX Systems, Inc.
+ * Copyright (c) 2010 Panasas, Inc.
+ * 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 unmodified, 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 AUTHOR ``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 AUTHOR 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_LOG2_H_
+#define	_LINUX_LOG2_H_
+
+#include <linux/types.h>
+
+#include <sys/libkern.h>
+
+static inline unsigned long
+roundup_pow_of_two(unsigned long x)
+{
+	return (1UL << flsl(x - 1));
+}
+
+static inline int
+is_power_of_2(unsigned long n)
+{
+	return (n == roundup_pow_of_two(n));
+}
+
+static inline unsigned long
+rounddown_pow_of_two(unsigned long x)
+{
+        return (1UL << (flsl(x) - 1));
+}
+
+static inline unsigned long
+ilog2(unsigned long x)
+{
+	return (flsl(x) - 1);
+}
+
+#endif	/* _LINUX_LOG2_H_ */