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authorJuergen Gross <jgross@suse.com>2022-05-24 13:46:30 +0200
committerJuergen Gross <jgross@suse.com>2022-05-27 11:05:29 +0200
commit49f8b459fc1de5e3712b57c8ccefae9ec45270f8 (patch)
treea94aa459860a3d82cae0933e922e1cbfaa980766 /net/9p
parent5b3353949e89d48b4faf54a9cc241ee5d70df615 (diff)
xen: switch gnttab_end_foreign_access() to take a struct page pointer
Instead of a virtual kernel address use a pointer of the associated struct page as second parameter of gnttab_end_foreign_access(). Most users have that pointer available already and are creating the virtual address from it, risking problems in case the memory is located in highmem. gnttab_end_foreign_access() itself won't need to get the struct page from the address again. Suggested-by: Jan Beulich <jbeulich@suse.com> Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Jan Beulich <jbeulich@suse.com> Signed-off-by: Juergen Gross <jgross@suse.com>
Diffstat (limited to 'net/9p')
-rw-r--r--net/9p/trans_xen.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/net/9p/trans_xen.c b/net/9p/trans_xen.c
index 77883b6788cd..833cd3792c51 100644
--- a/net/9p/trans_xen.c
+++ b/net/9p/trans_xen.c
@@ -279,13 +279,13 @@ static void xen_9pfs_front_free(struct xen_9pfs_front_priv *priv)
grant_ref_t ref;
ref = priv->rings[i].intf->ref[j];
- gnttab_end_foreign_access(ref, 0);
+ gnttab_end_foreign_access(ref, NULL);
}
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);
+ gnttab_end_foreign_access(priv->rings[i].ref, NULL);
free_page((unsigned long)priv->rings[i].intf);
}
kfree(priv->rings);
@@ -353,10 +353,10 @@ static int xen_9pfs_front_alloc_dataring(struct xenbus_device *dev,
out:
if (bytes) {
for (i--; i >= 0; i--)
- gnttab_end_foreign_access(ring->intf->ref[i], 0);
+ gnttab_end_foreign_access(ring->intf->ref[i], NULL);
free_pages_exact(bytes, 1UL << (order + XEN_PAGE_SHIFT));
}
- gnttab_end_foreign_access(ring->ref, 0);
+ gnttab_end_foreign_access(ring->ref, NULL);
free_page((unsigned long)ring->intf);
return ret;
}