Changes in / [4c3602c4:2c2d54a] in mainline

File:

• kernel/generic/src/mm/backend_user.c (modified) (6 diffs)

kernel/generic/src/mm/backend_user.c

@@ -39 +39 @@
 #include <mm/as.h>
 #include <mm/page.h>
-#include <mm/frame.h>
 #include <abi/mm/as.h>
 #include <abi/ipc/methods.h>
@@ -51 +50 @@
 
 static bool user_create(as_area_t *);
+static bool user_resize(as_area_t *, size_t);
+static void user_share(as_area_t *);
 static void user_destroy(as_area_t *);
 
@@ -61 +62 @@
 mem_backend_t user_backend = {
         .create = user_create,
-        .resize = NULL,
-        .share = NULL,
+        .resize = user_resize,
+        .share = user_share,
         .destroy = user_destroy,
 
@@ -80 +81 @@
 }
 
+bool user_resize(as_area_t *area, size_t new_pages)
+{
+        return true;
+}
+
+/** Share the user-paged address space area.
+ *
+ * The address space and address space area must be already locked.
+ *
+ * @param area Address space area to be shared.
+ */
+void user_share(as_area_t *area)
+{
+        ASSERT(mutex_locked(&area->as->lock));
+        ASSERT(mutex_locked(&area->lock));
+}
+
 void user_destroy(as_area_t *area)
 {
@@ -87 +105 @@
 bool user_is_resizable(as_area_t *area)
 {
-        return false;
+        return true;
 }
 
 bool user_is_shareable(as_area_t *area)
 {
-        return false;
+        return true;
 }
 
@@ -164 +182 @@
         ASSERT(page_table_locked(area->as));
         ASSERT(mutex_locked(&area->lock));
-
-        pfn_t pfn = ADDR2PFN(frame);
-        if (find_zone(pfn, 1, 0) != (size_t) -1) {
-                frame_free(frame, 1);
-        } else {
-                /* Nothing to do */
-        }
-                
 }