Merge branch 'ipv6_stable_privacy_address'

[firefly-linux-kernel-4.4.55.git] / include / net / checksum.h

diff --git a/include/net/checksum.h b/include/net/checksum.h
index e339a9513e2963ea9f5bfbf77a2851836d36cddc..0a55ac715077d0aad820916f9daf979ae3dfd0fd 100644 (file)
--- a/include/net/checksum.h
+++ b/include/net/checksum.h
@@ -167,4 +167,9 @@ static inline __wsum remcsum_adjust(void *ptr, __wsum csum,
        return delta;
 }
 
+static inline void remcsum_unadjust(__sum16 *psum, __wsum delta)
+{
+       *psum = csum_fold(csum_sub(delta, *psum));
+}
+
 #endif