Changes in kernel/generic/src/mm/backend_anon.c [83b6ba9f:5df1963] in mainline

File:

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

kernel/generic/src/mm/backend_anon.c

@@ -76 +76 @@
         .page_fault = anon_page_fault,
         .frame_free = anon_frame_free,
-
-        .create_shared_data = NULL,
-        .destroy_shared_data = NULL
 };
 
@@ -193 +190 @@
                 return AS_PF_FAULT;
 
-        mutex_lock(&area->sh_info->lock);
-        if (area->sh_info->shared) {
+        if (area->sh_info) {
                 btree_node_t *leaf;
                 
@@ -204 +200 @@
                  * mapping, a new frame is allocated and the mapping is created.
                  */
+                mutex_lock(&area->sh_info->lock);
                 frame = (uintptr_t) btree_search(&area->sh_info->pagemap,
                     upage - area->base, &leaf);
@@ -235 +232 @@
                 }
                 frame_reference_add(ADDR2PFN(frame));
+                mutex_unlock(&area->sh_info->lock);
         } else {
 
@@ -256 +254 @@
                          * Reserve the memory for this page now.
                          */
-                        if (!reserve_try_alloc(1)) {
-                                mutex_unlock(&area->sh_info->lock);
+                        if (!reserve_try_alloc(1))
                                 return AS_PF_SILENT;
-                        }
                 }
 
@@ -266 +262 @@
                 km_temporary_page_put(kpage);
         }
-        mutex_unlock(&area->sh_info->lock);
         
         /*