crypto: algif - fix warn: unsigned 'used' is never less than zero

Change type from unsigned long to int to fix an issue reported by kbuild robot:
crypto/algif_skcipher.c:596 skcipher_recvmsg_async() warn: unsigned 'used' is
never less than zero.

Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/crypto/algif_skcipher.c b/crypto/algif_skcipher.c
index 8276f21..60496d4 100644 (file)
--- a/crypto/algif_skcipher.c
+++ b/crypto/algif_skcipher.c
@@ -537,7 +537,7 @@ static int skcipher_recvmsg_async(struct socket *sock, struct msghdr *msg,
 
        while (iov_iter_count(&msg->msg_iter)) {
                struct skcipher_async_rsgl *rsgl;
-               unsigned long used;
+               int used;
 
                if (!ctx->used) {
                        err = skcipher_wait_for_data(sk, flags);