[RFC 01/10] mtd: move is_power_of_2() to a public place

[Wolfram Sang]

Will need this later for ubiformat.

Signed-off-by: Wolfram Sang <w.sang at pengutronix.de>
---
 drivers/mtd/ubi/ubi-barebox.h |    5 +----
 include/mtd/utils.h           |   25 +++++++++++++++++++++++++
 2 files changed, 26 insertions(+), 4 deletions(-)
 create mode 100644 include/mtd/utils.h

diff --git a/drivers/mtd/ubi/ubi-barebox.h b/drivers/mtd/ubi/ubi-barebox.h
index 72f29a6..919dc50 100644
--- a/drivers/mtd/ubi/ubi-barebox.h
+++ b/drivers/mtd/ubi/ubi-barebox.h
@@ -25,6 +25,7 @@
 #include <linux/string.h>
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/ubi.h>
+#include <mtd/utils.h>
 
 #define crc32(seed, data, length)  crc32_no_comp(seed, (unsigned char const *)data, length)
 
@@ -53,10 +54,6 @@ do {									\
 #define put_device(...)
 #define ubi_sysfs_init(...)		0
 #define ubi_sysfs_close(...)		do { } while (0)
-static inline int is_power_of_2(unsigned long n)
-{
-	return (n != 0 && ((n & (n - 1)) == 0));
-}
 
 /* FIXME */
 #define MKDEV(...)			0
diff --git a/include/mtd/utils.h b/include/mtd/utils.h
new file mode 100644
index 0000000..229fb34
--- /dev/null
+++ b/include/mtd/utils.h
@@ -0,0 +1,25 @@
+/*
+ * mtd/utils.h - helper functions for various MTD utilities
+ *
+ * Copyright (C) 2012 by Wolfram Sang <w.sang at pengutronix.de>
+ *
+ * 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.
+ */
+
+#ifndef INCLUDE_MTD_UTILS_H
+# define INCLUDE_MTD_UTILS_H
+
+static inline int is_power_of_2(unsigned long n)
+{
+	return (n != 0 && ((n & (n - 1)) == 0));
+}
+
+#endif /* INCLUDE_MTD_UTILS_H */
-- 
1.7.10.4