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tcm_vhost: Introduce iov_num_pages

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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>
This commit is contained in:
Asias He 2013-01-22 11:20:25 +08:00 committed by Nicholas Bellinger
parent 9d6064a347
commit 765b34fdc1
1 changed files with 6 additions and 0 deletions
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6
drivers/vhost/tcm_vhost.c
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@ -77,6 +77,12 @@ static struct workqueue_struct *tcm_vhost_workqueue;
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;