diff options
| author | Juergen Gross <jgross@suse.com> | 2022-05-24 14:46:30 +0300 |
|---|---|---|
| committer | Juergen Gross <jgross@suse.com> | 2022-05-27 12:05:29 +0300 |
| commit | 49f8b459fc1de5e3712b57c8ccefae9ec45270f8 (patch) | |
| tree | a94aa459860a3d82cae0933e922e1cbfaa980766 /net | |
| parent | 5b3353949e89d48b4faf54a9cc241ee5d70df615 (diff) | |
| download | linux-49f8b459fc1de5e3712b57c8ccefae9ec45270f8.tar.xz | |
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')
| -rw-r--r-- | net/9p/trans_xen.c | 8 |
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; } |