4 files changed, 26 insertions, 46 deletions

diff --git a/drivers/net/macvtap.c b/drivers/net/macvtap.c
index a98fb0ed6aef..dfec20df17ba 100644
--- a/drivers/net/macvtap.c
+++ b/drivers/net/macvtap.c
@@ -698,29 +698,6 @@ static int macvtap_skb_to_vnet_hdr(const struct sk_buff *skb,
         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 macvtap_get_user(struct macvtap_queue *q, struct msghdr *m,
                                 const struct iovec *iv, unsigned long total_len,
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,
diff --git a/include/linux/socket.h b/include/linux/socket.h
index 230c04bda3e2..445ef7519dc2 100644
--- a/include/linux/socket.h
+++ b/include/linux/socket.h
@@ -313,6 +313,8 @@ extern int csum_partial_copy_fromiovecend(unsigned char *kdata,
                                           struct iovec *iov, 
                                           int offset, 
                                           unsigned int len, __wsum *csump);
+extern unsigned long iov_pages(const struct iovec *iov, int offset,
+                               unsigned long nr_segs);
 
 extern int verify_iovec(struct msghdr *m, struct iovec *iov, struct sockaddr_storage *address, int mode);
 extern int memcpy_toiovecend(const struct iovec *v, unsigned char *kdata,
diff --git a/net/core/iovec.c b/net/core/iovec.c
index de178e462682..b77eeecc0011 100644
--- a/net/core/iovec.c
+++ b/net/core/iovec.c
@@ -212,3 +212,27 @@ out_fault:
         goto out;
 }
 EXPORT_SYMBOL(csum_partial_copy_fromiovecend);
+
+unsigned long iov_pages(const struct iovec *iov, int offset,
+                        unsigned long nr_segs)
+{
+        unsigned long seg, base;
+        int pages = 0, len, size;
+
+        while (nr_segs && (offset >= iov->iov_len)) {
+                offset -= iov->iov_len;
+                ++iov;
+                --nr_segs;
+        }
+
+        for (seg = 0; seg < nr_segs; seg++) {
+                base = (unsigned long)iov[seg].iov_base + offset;
+                len = iov[seg].iov_len - offset;
+                size = ((base & ~PAGE_MASK) + len + ~PAGE_MASK) >> PAGE_SHIFT;
+                pages += size;
+                offset = 0;
+        }
+
+        return pages;
+}
+EXPORT_SYMBOL(iov_pages);