Changes in kernel/generic/src/mm/as.c [315b7e3:75b139f] in mainline

File:

• kernel/generic/src/mm/as.c (modified) (4 diffs)

kernel/generic/src/mm/as.c

@@ -574 +574 @@
  * @param backend_data NULL or a pointer to custom backend data.
  * @param base         Starting virtual address of the area.
- *                     If set to -1, a suitable mappable area is found.
- * @param bound        Lowest address bound if base is set to -1.
+ *                     If set to AS_AREA_ANY, a suitable mappable area is
+ *                     found.
+ * @param bound        Lowest address bound if base is set to AS_AREA_ANY.
  *                     Otherwise ignored.
  *
@@ -585 +586 @@
     mem_backend_data_t *backend_data, uintptr_t *base, uintptr_t bound)
 {
-        if ((*base != (uintptr_t) -1) && !IS_ALIGNED(*base, PAGE_SIZE))
+        if ((*base != (uintptr_t) AS_AREA_ANY) && !IS_ALIGNED(*base, PAGE_SIZE))
                 return NULL;
         
@@ -601 +602 @@
         mutex_lock(&as->lock);
         
-        if (*base == (uintptr_t) -1) {
+        if (*base == (uintptr_t) AS_AREA_ANY) {
                 *base = as_get_unmapped_area(as, bound, size, guarded);
                 if (*base == (uintptr_t) -1) {
@@ -2182 +2183 @@
 
 sysarg_t sys_as_area_create(uintptr_t base, size_t size, unsigned int flags,
-    uintptr_t bound)
+    uintptr_t bound, int pager)
 {
         uintptr_t virt = base;
+        mem_backend_t *backend;
+        mem_backend_data_t backend_data;
+
+        if (pager == AS_AREA_UNPAGED)
+                backend = &anon_backend;
+        else {
+                backend = &user_backend;
+                backend_data.pager = pager;
+        }
         as_area_t *area = as_area_create(AS, flags, size,
-            AS_AREA_ATTR_NONE, &anon_backend, NULL, &virt, bound);
+            AS_AREA_ATTR_NONE, backend, &backend_data, &virt, bound);
         if (area == NULL)
-                return (sysarg_t) -1;
+                return (sysarg_t) AS_MAP_FAILED;
         
         return (sysarg_t) virt;