list_del(&persistent_gnt->node);
if (persistent_gnt->gref != GRANT_INVALID_REF) {
gnttab_end_foreign_access(persistent_gnt->gref,
- 0, 0UL);
+ 0UL);
rinfo->persistent_gnts_c--;
}
if (info->feature_persistent)
rinfo->shadow[i].req.u.rw.nr_segments;
for (j = 0; j < segs; j++) {
persistent_gnt = rinfo->shadow[i].grants_used[j];
- gnttab_end_foreign_access(persistent_gnt->gref, 0, 0UL);
+ gnttab_end_foreign_access(persistent_gnt->gref, 0UL);
if (info->feature_persistent)
__free_page(persistent_gnt->page);
kfree(persistent_gnt);
for (j = 0; j < INDIRECT_GREFS(segs); j++) {
persistent_gnt = rinfo->shadow[i].indirect_grants[j];
- gnttab_end_foreign_access(persistent_gnt->gref, 0, 0UL);
+ gnttab_end_foreign_access(persistent_gnt->gref, 0UL);
__free_page(persistent_gnt->page);
kfree(persistent_gnt);
}
/* Free resources associated with old device channel. */
for (i = 0; i < info->nr_ring_pages; i++) {
if (rinfo->ring_ref[i] != GRANT_INVALID_REF) {
- gnttab_end_foreign_access(rinfo->ring_ref[i], 0, 0);
+ gnttab_end_foreign_access(rinfo->ring_ref[i], 0);
rinfo->ring_ref[i] = GRANT_INVALID_REF;
}
}
return;
if (priv->ring_ref)
- gnttab_end_foreign_access(priv->ring_ref, 0,
+ gnttab_end_foreign_access(priv->ring_ref,
(unsigned long)priv->shr);
else
free_page((unsigned long)priv->shr);
/* end access and free the page */
if (evtchnl->gref != GRANT_INVALID_REF)
- gnttab_end_foreign_access(evtchnl->gref, 0, page);
+ gnttab_end_foreign_access(evtchnl->gref, page);
memset(evtchnl, 0, sizeof(*evtchnl));
}
error_evtchan:
xenbus_free_evtchn(dev, evtchn);
error_grant:
- gnttab_end_foreign_access(info->gref, 0, 0UL);
+ gnttab_end_foreign_access(info->gref, 0UL);
info->gref = -1;
return ret;
}
unbind_from_irqhandler(info->irq, info);
info->irq = -1;
if (info->gref >= 0)
- gnttab_end_foreign_access(info->gref, 0, 0UL);
+ gnttab_end_foreign_access(info->gref, 0UL);
info->gref = -1;
}
skb = queue->tx_skbs[id];
queue->tx_skbs[id] = NULL;
if (unlikely(!gnttab_end_foreign_access_ref(
- queue->grant_tx_ref[id], GNTMAP_readonly))) {
+ queue->grant_tx_ref[id]))) {
dev_alert(dev,
"Grant still in use by backend domain\n");
goto err;
goto next;
}
- if (!gnttab_end_foreign_access_ref(ref, 0)) {
+ if (!gnttab_end_foreign_access_ref(ref)) {
dev_alert(dev,
"Grant still in use by backend domain\n");
queue->info->broken = true;
queue->tx_skbs[i] = NULL;
get_page(queue->grant_tx_page[i]);
gnttab_end_foreign_access(queue->grant_tx_ref[i],
- GNTMAP_readonly,
(unsigned long)page_address(queue->grant_tx_page[i]));
queue->grant_tx_page[i] = NULL;
queue->grant_tx_ref[i] = GRANT_INVALID_REF;
* foreign access is ended (which may be deferred).
*/
get_page(page);
- gnttab_end_foreign_access(ref, 0,
+ gnttab_end_foreign_access(ref,
(unsigned long)page_address(page));
queue->grant_rx_ref[id] = GRANT_INVALID_REF;
{
/* This frees the page as a side-effect */
if (ref != GRANT_INVALID_REF)
- gnttab_end_foreign_access(ref, 0, (unsigned long)page);
+ gnttab_end_foreign_access(ref, (unsigned long)page);
}
static void xennet_disconnect_backend(struct netfront_info *info)
*/
fail:
if (queue->rx_ring_ref != GRANT_INVALID_REF) {
- gnttab_end_foreign_access(queue->rx_ring_ref, 0,
+ gnttab_end_foreign_access(queue->rx_ring_ref,
(unsigned long)rxs);
queue->rx_ring_ref = GRANT_INVALID_REF;
} else {
free_page((unsigned long)rxs);
}
if (queue->tx_ring_ref != GRANT_INVALID_REF) {
- gnttab_end_foreign_access(queue->tx_ring_ref, 0,
+ gnttab_end_foreign_access(queue->tx_ring_ref,
(unsigned long)txs);
queue->tx_ring_ref = GRANT_INVALID_REF;
} else {
xenbus_free_evtchn(pdev->xdev, pdev->evtchn);
if (pdev->gnt_ref != INVALID_GRANT_REF)
- gnttab_end_foreign_access(pdev->gnt_ref, 0 /* r/w page */,
+ gnttab_end_foreign_access(pdev->gnt_ref,
(unsigned long)pdev->sh_info);
else
free_page((unsigned long)pdev->sh_info);
free_irq:
unbind_from_irqhandler(info->irq, info);
free_gnttab:
- gnttab_end_foreign_access(info->ring_ref, 0,
+ gnttab_end_foreign_access(info->ring_ref,
(unsigned long)info->ring.sring);
return err;
static void scsifront_free_ring(struct vscsifrnt_info *info)
{
unbind_from_irqhandler(info->irq, info);
- gnttab_end_foreign_access(info->ring_ref, 0,
+ gnttab_end_foreign_access(info->ring_ref,
(unsigned long)info->ring.sring);
}
info->irq = 0;
if (info->urb_ring_ref != GRANT_INVALID_REF) {
- gnttab_end_foreign_access(info->urb_ring_ref, 0,
+ gnttab_end_foreign_access(info->urb_ring_ref,
(unsigned long)info->urb_ring.sring);
info->urb_ring_ref = GRANT_INVALID_REF;
}
info->urb_ring.sring = NULL;
if (info->conn_ring_ref != GRANT_INVALID_REF) {
- gnttab_end_foreign_access(info->conn_ring_ref, 0,
+ gnttab_end_foreign_access(info->conn_ring_ref,
(unsigned long)info->conn_ring.sring);
info->conn_ring_ref = GRANT_INVALID_REF;
}
if (gref->gref_id) {
if (gref->page) {
addr = (unsigned long)page_to_virt(gref->page);
- gnttab_end_foreign_access(gref->gref_id, 0, addr);
+ gnttab_end_foreign_access(gref->gref_id, addr);
} else
gnttab_free_grant_reference(gref->gref_id);
}
for (i = 0; i < count; i++)
if (refs[i] != GRANT_INVALID_REF)
- gnttab_end_foreign_access(refs[i], 0, 0UL);
+ gnttab_end_foreign_access(refs[i], 0UL);
}
static void dmabuf_imp_free_storage(struct gntdev_dmabuf *gntdev_dmabuf)
unsigned long frame, unsigned flags);
/*
* Stop granting a grant entry to domain for accessing. Ref parameter is
- * reference of a grant entry whose grant access will be stopped,
- * readonly is not in use in this function. If the grant entry is
- * currently mapped for reading or writing, just return failure(==0)
- * directly and don't tear down the grant access. Otherwise, stop grant
- * access for this entry and return success(==1).
+ * reference of a grant entry whose grant access will be stopped.
+ * If the grant entry is currently mapped for reading or writing, just
+ * return failure(==0) directly and don't tear down the grant access.
+ * Otherwise, stop grant access for this entry and return success(==1).
*/
- int (*end_foreign_access_ref)(grant_ref_t ref, int readonly);
+ int (*end_foreign_access_ref)(grant_ref_t ref);
/*
* Read the frame number related to a given grant reference.
*/
}
EXPORT_SYMBOL_GPL(gnttab_grant_foreign_access);
-static int gnttab_end_foreign_access_ref_v1(grant_ref_t ref, int readonly)
+static int gnttab_end_foreign_access_ref_v1(grant_ref_t ref)
{
u16 flags, nflags;
u16 *pflags;
return 1;
}
-static int gnttab_end_foreign_access_ref_v2(grant_ref_t ref, int readonly)
+static int gnttab_end_foreign_access_ref_v2(grant_ref_t ref)
{
gnttab_shared.v2[ref].hdr.flags = 0;
mb(); /* Concurrent access by hypervisor. */
return 1;
}
-static inline int _gnttab_end_foreign_access_ref(grant_ref_t ref, int readonly)
+static inline int _gnttab_end_foreign_access_ref(grant_ref_t ref)
{
- return gnttab_interface->end_foreign_access_ref(ref, readonly);
+ return gnttab_interface->end_foreign_access_ref(ref);
}
-int gnttab_end_foreign_access_ref(grant_ref_t ref, int readonly)
+int gnttab_end_foreign_access_ref(grant_ref_t ref)
{
- if (_gnttab_end_foreign_access_ref(ref, readonly))
+ if (_gnttab_end_foreign_access_ref(ref))
return 1;
pr_warn("WARNING: g.e. %#x still in use!\n", ref);
return 0;
struct deferred_entry {
struct list_head list;
grant_ref_t ref;
- bool ro;
uint16_t warn_delay;
struct page *page;
};
break;
list_del(&entry->list);
spin_unlock_irqrestore(&gnttab_list_lock, flags);
- if (_gnttab_end_foreign_access_ref(entry->ref, entry->ro)) {
+ if (_gnttab_end_foreign_access_ref(entry->ref)) {
put_free_entry(entry->ref);
pr_debug("freeing g.e. %#x (pfn %#lx)\n",
entry->ref, page_to_pfn(entry->page));
spin_unlock_irqrestore(&gnttab_list_lock, flags);
}
-static void gnttab_add_deferred(grant_ref_t ref, bool readonly,
- struct page *page)
+static void gnttab_add_deferred(grant_ref_t ref, struct page *page)
{
struct deferred_entry *entry;
gfp_t gfp = (in_atomic() || irqs_disabled()) ? GFP_ATOMIC : GFP_KERNEL;
unsigned long flags;
entry->ref = ref;
- entry->ro = readonly;
entry->page = page;
entry->warn_delay = 60;
spin_lock_irqsave(&gnttab_list_lock, flags);
int gnttab_try_end_foreign_access(grant_ref_t ref)
{
- int ret = _gnttab_end_foreign_access_ref(ref, 0);
+ int ret = _gnttab_end_foreign_access_ref(ref);
if (ret)
put_free_entry(ref);
}
EXPORT_SYMBOL_GPL(gnttab_try_end_foreign_access);
-void gnttab_end_foreign_access(grant_ref_t ref, int readonly,
- unsigned long page)
+void gnttab_end_foreign_access(grant_ref_t ref, unsigned long page)
{
if (gnttab_try_end_foreign_access(ref)) {
if (page != 0)
put_page(virt_to_page(page));
} else
- gnttab_add_deferred(ref, readonly,
- page ? virt_to_page(page) : NULL);
+ gnttab_add_deferred(ref, page ? virt_to_page(page) : NULL);
}
EXPORT_SYMBOL_GPL(gnttab_end_foreign_access);
spin_unlock(&bedata->socket_lock);
for (i = 0; i < (1 << PVCALLS_RING_ORDER); i++)
- gnttab_end_foreign_access(map->active.ring->ref[i], 0, 0);
- gnttab_end_foreign_access(map->active.ref, 0, 0);
+ gnttab_end_foreign_access(map->active.ring->ref[i], 0);
+ gnttab_end_foreign_access(map->active.ref, 0);
free_page((unsigned long)map->active.ring);
kfree(map);
}
}
if (bedata->ref != -1)
- gnttab_end_foreign_access(bedata->ref, 0, 0);
+ gnttab_end_foreign_access(bedata->ref, 0);
kfree(bedata->ring.sring);
kfree(bedata);
xenbus_switch_state(dev, XenbusStateClosed);
for (i = 0; i < buf->num_grefs; i++)
if (buf->grefs[i] != GRANT_INVALID_REF)
- gnttab_end_foreign_access(buf->grefs[i],
- 0, 0UL);
+ gnttab_end_foreign_access(buf->grefs[i], 0UL);
}
kfree(buf->grefs);
kfree(buf->directory);
* longer in use. Return 1 if the grant entry was freed, 0 if it is still in
* use.
*/
-int gnttab_end_foreign_access_ref(grant_ref_t ref, int readonly);
+int gnttab_end_foreign_access_ref(grant_ref_t ref);
/*
* Eventually end access through the given grant reference, and once that
* gnttab_end_foreign_access() are done via alloc_pages_exact() (and freeing
* via free_pages_exact()) in order to avoid high order pages.
*/
-void gnttab_end_foreign_access(grant_ref_t ref, int readonly,
- unsigned long page);
+void gnttab_end_foreign_access(grant_ref_t ref, unsigned long page);
/*
* End access through the given grant reference, iff the grant entry is
grant_ref_t ref;
ref = priv->rings[i].intf->ref[j];
- gnttab_end_foreign_access(ref, 0, 0);
+ gnttab_end_foreign_access(ref, 0);
}
free_pages_exact(priv->rings[i].data.in,
1UL << (priv->rings[i].intf->ring_order +
XEN_PAGE_SHIFT));
}
- gnttab_end_foreign_access(priv->rings[i].ref, 0, 0);
+ gnttab_end_foreign_access(priv->rings[i].ref, 0);
free_page((unsigned long)priv->rings[i].intf);
}
kfree(priv->rings);
out:
if (bytes) {
for (i--; i >= 0; i--)
- gnttab_end_foreign_access(ring->intf->ref[i], 0, 0);
+ gnttab_end_foreign_access(ring->intf->ref[i], 0);
free_pages_exact(bytes, 1UL << (order + XEN_PAGE_SHIFT));
}
- gnttab_end_foreign_access(ring->ref, 0, 0);
+ gnttab_end_foreign_access(ring->ref, 0);
free_page((unsigned long)ring->intf);
return ret;
}
/* End access and free the page. */
if (channel->gref != GRANT_INVALID_REF)
- gnttab_end_foreign_access(channel->gref, 0, page);
+ gnttab_end_foreign_access(channel->gref, page);
else
free_page(page);