net: move iov_pages() to net/core/iovec.c

To let it be reused and reduce code duplication.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 0 insertions, 23 deletions

diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 5dce262f538e..18527ef0cc75 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -1041,29 +1041,6 @@ static int zerocopy_sg_from_iovec(struct sk_buff *skb, const struct iovec *from,
         return 0;
 }
 
-static unsigned long iov_pages(const struct iovec *iv, int offset,
-                               unsigned long nr_segs)
-{
-        unsigned long seg, base;
-        int pages = 0, len, size;
-
-        while (nr_segs && (offset >= iv->iov_len)) {
-                offset -= iv->iov_len;
-                ++iv;
-                --nr_segs;
-        }
-
-        for (seg = 0; seg < nr_segs; seg++) {
-                base = (unsigned long)iv[seg].iov_base + offset;
-                len = iv[seg].iov_len - offset;
-                size = ((base & ~PAGE_MASK) + len + ~PAGE_MASK) >> PAGE_SHIFT;
-                pages += size;
-                offset = 0;
-        }
-
-        return pages;
-}
-
 /* Get packet from user space buffer */
 static ssize_t tun_get_user(struct tun_struct *tun, struct tun_file *tfile,
                             void *msg_control, const struct iovec *iv,