[TUN]: Use iov_length()

Use iov_length() instead of tun's homemade iov_total().

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index f8b8c71..5db4df4 100644 (file)
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -292,17 +292,6 @@ static __inline__ ssize_t tun_get_user(struct tun_struct *tun, struct iovec *iv,
        return count;
 }
 
-static inline size_t iov_total(const struct iovec *iv, unsigned long count)
-{
-       unsigned long i;
-       size_t len;
-
-       for (i = 0, len = 0; i < count; i++)
-               len += iv[i].iov_len;
-
-       return len;
-}
-
 static ssize_t tun_chr_aio_write(struct kiocb *iocb, const struct iovec *iv,
                              unsigned long count, loff_t pos)
 {
@@ -313,7 +302,7 @@ static ssize_t tun_chr_aio_write(struct kiocb *iocb, const struct iovec *iv,
 
        DBG(KERN_INFO "%s: tun_chr_write %ld\n", tun->dev->name, count);
 
-       return tun_get_user(tun, (struct iovec *) iv, iov_total(iv, count));
+       return tun_get_user(tun, (struct iovec *) iv, iov_length(iv, count));
 }
 
 /* Put packet to the user space buffer */
@@ -364,7 +353,7 @@ static ssize_t tun_chr_aio_read(struct kiocb *iocb, const struct iovec *iv,
 
        DBG(KERN_INFO "%s: tun_chr_read\n", tun->dev->name);
 
-       len = iov_total(iv, count);
+       len = iov_length(iv, count);
        if (len < 0)
                return -EINVAL;