Changeset 76fca31 in mainline for kernel/generic/src/mm/as.c

Timestamp:

2008-12-16T19:02:07Z (16 years ago)

Author:

Martin Decky <martin@…>

Branches:

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

Children:

5ae4443

Parents:

8fe5980

Message:

kconsole is optional
kernel & uspace framebuffer rewrite with speedups (some things are slightly broken yet)

File:

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

kernel/generic/src/mm/as.c

@@ -147 +147 @@
         AS_KERNEL = as_create(FLAG_AS_KERNEL);
         if (!AS_KERNEL)
-                panic("can't create kernel address space\n");
-        
+                panic("Cannot create kernel address space\n");
+        
+        /* Make sure the kernel address space
+         * reference count never drops to zero.
+         */
+        atomic_set(&AS_KERNEL->refcount, 1);
 }
 
@@ -177 +181 @@
         page_table_create(flags);
 #endif
-
+        
         return as;
 }
@@ -770 +774 @@
  * into private anonymous memory (unless it's already there).
  *
- * @param as            Address space.
- * @param flags         Flags of the area memory.
- * @param address       Address withing the area to be changed.
- *
- * @return              Zero on success or a value from @ref errno.h on failure.
+ * @param as      Address space.
+ * @param flags   Flags of the area memory.
+ * @param address Address within the area to be changed.
+ *
+ * @return Zero on success or a value from @ref errno.h on failure.
+ *
  */
 int as_area_change_flags(as_t *as, int flags, uintptr_t address)
@@ -786 +791 @@
         index_t frame_idx;
         count_t used_pages;
-
+        
         /* Flags for the new memory mapping */
         page_flags = area_flags_to_page_flags(flags);
@@ -800 +805 @@
         }
 
-        if (area->sh_info || area->backend != &anon_backend) {
+        if ((area->sh_info) || (area->backend != &anon_backend)) {
                 /* Copying shared areas not supported yet */
                 /* Copying non-anonymous memory not supported yet */
@@ -871 +876 @@
 
         tlb_invalidate_pages(as->asid, area->base, area->pages);
+        
         /*
          * Invalidate potential software translation caches (e.g. TSB on