From c94b731da21f10086a9e52d63c21c730e3f6c939 Mon Sep 17 00:00:00 2001
From: Juergen Gross <jgross@suse.com>
Date: Fri, 11 Mar 2022 11:34:29 +0100
Subject: [PATCH] xen/grant-table: remove readonly parameter from functions
Git-commit: c94b731da21f10086a9e52d63c21c730e3f6c939
References: jsc#PED-531
Patch-mainline: v5.18-rc1
The gnttab_end_foreign_access() family of functions is taking a
"readonly" parameter, which isn't used. Remove it from the function
parameters.
Signed-off-by: Juergen Gross <jgross@suse.com>
Link: https://lore.kernel.org/r/20220311103429.12845-3-jgross@suse.com
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Christian Schoenebeck <qemu_oss@crudebyte.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Oliver Neukum <oneukum@suse.com>
---
drivers/block/xen-blkfront.c | 8 ++---
drivers/char/tpm/xen-tpmfront.c | 2 -
drivers/gpu/drm/xen/xen_drm_front_evtchnl.c | 2 -
drivers/input/misc/xen-kbdfront.c | 4 +-
drivers/net/xen-netfront.c | 13 ++++-----
drivers/pci/xen-pcifront.c | 2 -
drivers/scsi/xen-scsifront.c | 4 +-
drivers/usb/host/xen-hcd.c | 4 +-
drivers/xen/gntalloc.c | 2 -
drivers/xen/gntdev-dmabuf.c | 2 -
drivers/xen/grant-table.c | 38 +++++++++++-----------------
drivers/xen/pvcalls-front.c | 6 ++--
drivers/xen/xen-front-pgdir-shbuf.c | 3 --
include/xen/grant_table.h | 5 +--
net/9p/trans_xen.c | 8 ++---
sound/xen/xen_snd_front_evtchnl.c | 2 -
16 files changed, 48 insertions(+), 57 deletions(-)
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -1226,7 +1226,7 @@ static void blkif_free_ring(struct blkfr
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)
@@ -1249,7 +1249,7 @@ static void blkif_free_ring(struct blkfr
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);
@@ -1264,7 +1264,7 @@ static void blkif_free_ring(struct blkfr
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);
}
@@ -1287,7 +1287,7 @@ free_shadow:
/* 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;
}
}
--- a/drivers/char/tpm/xen-tpmfront.c
+++ b/drivers/char/tpm/xen-tpmfront.c
@@ -332,7 +332,7 @@ static void ring_free(struct tpm_private
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);
--- a/drivers/gpu/drm/xen/xen_drm_front_evtchnl.c
+++ b/drivers/gpu/drm/xen/xen_drm_front_evtchnl.c
@@ -148,7 +148,7 @@ static void evtchnl_free(struct xen_drm_
/* 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));
}
--- a/drivers/input/misc/xen-kbdfront.c
+++ b/drivers/input/misc/xen-kbdfront.c
@@ -481,7 +481,7 @@ static int xenkbd_connect_backend(struct
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;
}
@@ -492,7 +492,7 @@ static void xenkbd_disconnect_backend(st
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;
}
--- a/drivers/net/xen-netfront.c
+++ b/drivers/net/xen-netfront.c
@@ -425,7 +425,7 @@ static bool xennet_tx_buf_gc(struct netf
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;
@@ -1007,7 +1007,7 @@ static int xennet_get_responses(struct n
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;
@@ -1366,7 +1366,6 @@ static void xennet_release_tx_bufs(struc
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;
@@ -1399,7 +1398,7 @@ static void xennet_release_rx_bufs(struc
* 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;
@@ -1740,7 +1739,7 @@ static void xennet_end_access(int ref, v
{
/* 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)
@@ -1957,14 +1956,14 @@ static int setup_netfront(struct xenbus_
*/
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 {
--- a/drivers/pci/xen-pcifront.c
+++ b/drivers/pci/xen-pcifront.c
@@ -767,7 +767,7 @@ static void free_pdev(struct pcifront_de
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);
--- a/drivers/scsi/xen-scsifront.c
+++ b/drivers/scsi/xen-scsifront.c
@@ -757,7 +757,7 @@ static int scsifront_alloc_ring(struct v
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;
@@ -766,7 +766,7 @@ free_gnttab:
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);
}
--- a/drivers/usb/host/xen-hcd.c
+++ b/drivers/usb/host/xen-hcd.c
@@ -1073,14 +1073,14 @@ static void xenhcd_destroy_rings(struct
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;
}
--- a/drivers/xen/gntalloc.c
+++ b/drivers/xen/gntalloc.c
@@ -192,7 +192,7 @@ static void __del_gref(struct gntalloc_g
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);
}
--- a/drivers/xen/gntdev-dmabuf.c
+++ b/drivers/xen/gntdev-dmabuf.c
@@ -530,7 +530,7 @@ static void dmabuf_imp_end_foreign_acces
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)
--- a/drivers/xen/grant-table.c
+++ b/drivers/xen/grant-table.c
@@ -118,13 +118,12 @@ struct gnttab_ops {
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);
/*
* Stop granting a grant entry to domain for transfer. Ref parameter is
* reference of a grant entry whose grant transfer will be stopped. If
@@ -304,7 +303,7 @@ int gnttab_query_foreign_access(grant_re
}
EXPORT_SYMBOL_GPL(gnttab_query_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;
@@ -320,7 +319,7 @@ static int gnttab_end_foreign_access_ref
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. */
@@ -343,14 +342,14 @@ static int gnttab_end_foreign_access_ref
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;
@@ -370,7 +369,6 @@ static unsigned long gnttab_read_frame_v
struct deferred_entry {
struct list_head list;
grant_ref_t ref;
- bool ro;
uint16_t warn_delay;
struct page *page;
};
@@ -394,7 +392,7 @@ static void gnttab_handle_deferred(struc
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));
@@ -420,8 +418,7 @@ static void gnttab_handle_deferred(struc
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;
@@ -439,7 +436,6 @@ static void gnttab_add_deferred(grant_re
unsigned long flags;
entry->ref = ref;
- entry->ro = readonly;
entry->page = page;
entry->warn_delay = 60;
spin_lock_irqsave(&gnttab_list_lock, flags);
@@ -457,7 +453,7 @@ static void gnttab_add_deferred(grant_re
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);
@@ -466,15 +462,13 @@ int gnttab_try_end_foreign_access(grant_
}
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);
--- a/drivers/xen/pvcalls-front.c
+++ b/drivers/xen/pvcalls-front.c
@@ -238,8 +238,8 @@ static void pvcalls_front_free_map(struc
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);
@@ -1117,7 +1117,7 @@ static int pvcalls_front_remove(struct x
}
}
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);
--- a/drivers/xen/xen-front-pgdir-shbuf.c
+++ b/drivers/xen/xen-front-pgdir-shbuf.c
@@ -143,8 +143,7 @@ void xen_front_pgdir_shbuf_free(struct x
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);
--- a/include/xen/grant_table.h
+++ b/include/xen/grant_table.h
@@ -97,7 +97,7 @@ int gnttab_grant_foreign_access(domid_t
* 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
@@ -114,8 +114,7 @@ int gnttab_end_foreign_access_ref(grant_
* 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
--- a/net/9p/trans_xen.c
+++ b/net/9p/trans_xen.c
@@ -302,13 +302,13 @@ static void xen_9pfs_front_free(struct x
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);
@@ -376,10 +376,10 @@ static int xen_9pfs_front_alloc_dataring
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;
}
--- a/sound/xen/xen_snd_front_evtchnl.c
+++ b/sound/xen/xen_snd_front_evtchnl.c
@@ -168,7 +168,7 @@ static void evtchnl_free(struct xen_snd_
/* 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);