+ if (likely(walk.nbytes == nbytes))
+ {
+ salsa20_encrypt_bytes(ctx, walk.dst.virt.addr,
+ walk.src.virt.addr, nbytes);
+ return blkcipher_walk_done(desc, &walk, 0);
+ }
+
+ while (walk.nbytes >= 64) {
+ salsa20_encrypt_bytes(ctx, walk.dst.virt.addr,
+ walk.src.virt.addr,
+ walk.nbytes - (walk.nbytes % 64));
+ err = blkcipher_walk_done(desc, &walk, walk.nbytes % 64);
+ }
+
+ if (walk.nbytes) {
+ salsa20_encrypt_bytes(ctx, walk.dst.virt.addr,
+ walk.src.virt.addr, walk.nbytes);
+ err = blkcipher_walk_done(desc, &walk, 0);
+ }
+