Changeset 6461d286 in mainline for kernel/generic/src/mm/backend_anon.c

Timestamp:

2008-09-01T21:25:21Z (16 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

ae7f6fb

Parents:

82b72e40

Message:

Fix the rare case when the anon or ELF backend uses PFN 0 for mapping.

File:

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

kernel/generic/src/mm/backend_anon.c

@@ -79 +79 @@
 {
         uintptr_t frame;
-        bool dirty = false;
 
         if (!as_area_check_access(area, access))
@@ -107 +106 @@
                         for (i = 0; i < leaf->keys; i++) {
                                 if (leaf->key[i] ==
-                                    ALIGN_DOWN(addr, PAGE_SIZE)) {
+                                    ALIGN_DOWN(addr, PAGE_SIZE) - area->base) {
                                         allocate = false;
                                         break;
@@ -115 +114 @@
                                 frame = (uintptr_t) frame_alloc(ONE_FRAME, 0);
                                 memsetb((void *) PA2KA(frame), FRAME_SIZE, 0);
-                                dirty = true;
                                 
                                 /*
@@ -146 +144 @@
                 frame = (uintptr_t) frame_alloc(ONE_FRAME, 0);
                 memsetb((void *) PA2KA(frame), FRAME_SIZE, 0);
-                dirty = true;
         }