tcm_vhost: Introduce iov_num_pages
Add a helper to calculate the number of pages needed for a iov entry.
(nab: Drop unnecessary inline)
Signed-off-by: Asias He <asias@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
diff --git a/drivers/vhost/tcm_vhost.c b/drivers/vhost/tcm_vhost.c
index 77d760b..defc285 100644
--- a/drivers/vhost/tcm_vhost.c
+++ b/drivers/vhost/tcm_vhost.c
@@ -77,6 +77,12 @@
static DEFINE_MUTEX(tcm_vhost_mutex);
static LIST_HEAD(tcm_vhost_list);
+static int iov_num_pages(struct iovec *iov)
+{
+ return (PAGE_ALIGN((unsigned long)iov->iov_base + iov->iov_len) -
+ ((unsigned long)iov->iov_base & PAGE_MASK)) >> PAGE_SHIFT;
+}
+
static int tcm_vhost_check_true(struct se_portal_group *se_tpg)
{
return 1;