kernel_5.10 no rt

hc

2023-12-11 6778948f9de86c3cfaf36725a7c87dcff9ba247f

 kernel/drivers/xen/gntalloc.c
..
..
@@ -169,20 +169,14 @@
169
169
 		__del_gref(gref);
170
170
 	}
171
171
 
172
-	/* It's possible for the target domain to map the just-allocated grant
173
-	 * references by blindly guessing their IDs; if this is done, then
174
-	 * __del_gref will leave them in the queue_gref list. They need to be
175
-	 * added to the global list so that we can free them when they are no
176
-	 * longer referenced.
177
-	 */
178
-	if (unlikely(!list_empty(&queue_gref)))
179
-		list_splice_tail(&queue_gref, &gref_list);
180
172
 	mutex_unlock(&gref_mutex);
181
173
 	return rc;
182
174
 }
183
175
 
184
176
 static void __del_gref(struct gntalloc_gref *gref)
185
177
 {
178
+	unsigned long addr;
179
+
186
180
 	if (gref->notify.flags & UNMAP_NOTIFY_CLEAR_BYTE) {
187
181
 		uint8_t *tmp = kmap(gref->page);
188
182
 		tmp[gref->notify.pgoff] = 0;
..
..
@@ -196,20 +190,15 @@
196
190
 	gref->notify.flags = 0;
197
191
 
198
192
 	if (gref->gref_id) {
199
-		if (gnttab_query_foreign_access(gref->gref_id))
200
-			return;
201
-
202
-		if (!gnttab_end_foreign_access_ref(gref->gref_id, 0))
203
-			return;
204
-
205
-		gnttab_free_grant_reference(gref->gref_id);
193
+		if (gref->page) {
194
+			addr = (unsigned long)page_to_virt(gref->page);
195
+			gnttab_end_foreign_access(gref->gref_id, 0, addr);
196
+		} else
197
+			gnttab_free_grant_reference(gref->gref_id);
206
198
 	}
207
199
 
208
200
 	gref_size--;
209
201
 	list_del(&gref->next_gref);
210
-
211
-	if (gref->page)
212
-		__free_page(gref->page);
213
202
 
214
203
 	kfree(gref);
215
204
 }