X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=include%2Fcrypto%2Fscatterwalk.h;h=4fd95a323beb295ddf9efbe1dfb8a63db15c3a09;hb=afe997a183ecc0be72652c7a5ce2152bdf91724e;hp=833d208c25d64194525e8b1ff09d8ddaf261251d;hpb=6aa5fc434958d15a4d66d922d0416dfb03c07def;p=karo-tx-linux.git

diff --git a/include/crypto/scatterwalk.h b/include/crypto/scatterwalk.h
index 833d208c25d6..4fd95a323beb 100644
--- a/include/crypto/scatterwalk.h
+++ b/include/crypto/scatterwalk.h
@@ -68,6 +68,21 @@ static inline struct scatterlist *scatterwalk_sg_next(struct scatterlist *sg)
 	return (++sg)->length ? sg : (void *)sg_page(sg);
 }
 
+static inline void scatterwalk_crypto_chain(struct scatterlist *head,
+					    struct scatterlist *sg,
+					    int chain, int num)
+{
+	if (chain) {
+		head->length += sg->length;
+		sg = scatterwalk_sg_next(sg);
+	}
+
+	if (sg)
+		scatterwalk_sg_chain(head, num, sg);
+	else
+		sg_mark_end(head);
+}
+
 static inline unsigned long scatterwalk_samebuf(struct scatter_walk *walk_in,
 						struct scatter_walk *walk_out)
 {