[PATCH RFC PKS/PMEM 44/58] drivers/xen: Utilize new kmap_thread()

[ira.weiny@xxxxxxxxx]

From: Ira Weiny <ira.weiny@xxxxxxxxx>

These kmap() calls are localized to a single thread.  To avoid the over
head of global PKRS updates use the new kmap_thread() call.

Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>
Signed-off-by: Ira Weiny <ira.weiny@xxxxxxxxx>
---
 drivers/xen/gntalloc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/xen/gntalloc.c b/drivers/xen/gntalloc.c
index 3fa40c723e8e..3b78e055feff 100644
--- a/drivers/xen/gntalloc.c
+++ b/drivers/xen/gntalloc.c
@@ -184,9 +184,9 @@ static int add_grefs(struct ioctl_gntalloc_alloc_gref *op,
 static void __del_gref(struct gntalloc_gref *gref)
 {
        if (gref->notify.flags & UNMAP_NOTIFY_CLEAR_BYTE) {
-               uint8_t *tmp = kmap(gref->page);
+               uint8_t *tmp = kmap_thread(gref->page);
                tmp[gref->notify.pgoff] = 0;
-               kunmap(gref->page);
+               kunmap_thread(gref->page);
        }
        if (gref->notify.flags & UNMAP_NOTIFY_SEND_EVENT) {
                notify_remote_via_evtchn(gref->notify.event);
-- 
2.28.0.rc0.12.gb6a658bd00c9