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| author | Jason Wang <jasowang@redhat.com> | 2013-08-06 17:45:03 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-08-07 16:52:33 -0700 |
| commit | b4bf07771faaf959b0a916d35b1b930c030e30a8 (patch) | |
| tree | 9292ea7010fc74fb5c3f5039ee3886b1f42702f3 /drivers/net/tun.c | |
| parent | 6261d983f226f0a6a8d4d32b57a032bc23a5ebb6 (diff) | |
| download | kernel-common-b4bf07771faaf959b0a916d35b1b930c030e30a8.tar.gz kernel-common-b4bf07771faaf959b0a916d35b1b930c030e30a8.tar.bz2 kernel-common-b4bf07771faaf959b0a916d35b1b930c030e30a8.zip | |
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>
Diffstat (limited to 'drivers/net/tun.c')
| -rw-r--r-- | drivers/net/tun.c | 23 |
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, |