first commit

1 files changed, 15 insertions, 0 deletions

diff --git a/include/linux/crc-ccitt.h b/include/linux/crc-ccitt.h
new file mode 100644
index 000000000..f52696a1f
--- /dev/null
+++ b/include/linux/crc-ccitt.h
@@ -0,0 +1,15 @@
+#ifndef _LINUX_CRC_CCITT_H
+#define _LINUX_CRC_CCITT_H
+
+#include <linux/types.h>
+
+extern u16 const crc_ccitt_table[256];
+
+extern u16 crc_ccitt(u16 crc, const u8 *buffer, size_t len);
+
+static inline u16 crc_ccitt_byte(u16 crc, const u8 c)
+{
+	return (crc >> 8) ^ crc_ccitt_table[(crc ^ c) & 0xff];
+}
+
+#endif /* _LINUX_CRC_CCITT_H */