From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

This patch adds crc64 option entry in lib/Kconfig. This patch is part of
a patch originally written by Andy Shevchenko, Coly Li cherry-picks it
and compose the commit log for a re-written crc64 source code.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Coly Li <redacted>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Luis R. Rodriguez <redacted>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Thomas Gleixner <redacted>
Cc: Kate Stewart <redacted>
---
 lib/Kconfig | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/lib/Kconfig b/lib/Kconfig
index 706836ec314d..4059df9ec4c7 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig

@@ -170,6 +170,14 @@ config CRC32_BIT
 
 endchoice
 
+config CRC64
+	tristate "CRC64 functions"
+	help
+	  This option is provided for the case where no in-kernel-tree
+	  modules require CRC64 functions, but a module built outside
+	  the kernel tree does. Such modules that use library CRC64
+	  functions require M he