Update stale comments. The alternate address space mapping was eliminated

when PAE support was added to i386.  The direct mapping exists on amd64.

2 files changed, 2 insertions, 9 deletions

diff --git a/sys/amd64/include/pmap.h b/sys/amd64/include/pmap.h
index b3f7d77..c95a9f9 100644
--- a/sys/amd64/include/pmap.h
+++ b/sys/amd64/include/pmap.h
@@ -160,13 +160,7 @@ typedef u_int64_t pml4_entry_t;
 #define	PDESHIFT	(3)
 
 /*
- * Address of current and alternate address space page table maps
- * and directories.
- * XXX it might be saner to just direct map all of physical memory
- * into the kernel using 2MB pages.  We have enough space to do
- * it (2^47 bits of KVM, while current max physical addressability
- * is 2^40 physical bits).  Then we can get rid of the evil hole
- * in the page tables and the evil overlapping.
+ * Address of current address space page table maps and directories.
  */
 #ifdef _KERNEL
 #define	addr_PTmap	(KVADDR(PML4PML4I, 0, 0, 0))
diff --git a/sys/i386/include/pmap.h b/sys/i386/include/pmap.h
index 00a3f7b..519ff6c 100644
--- a/sys/i386/include/pmap.h
+++ b/sys/i386/include/pmap.h
@@ -174,8 +174,7 @@ typedef uint32_t pt_entry_t;
 #endif
 
 /*
- * Address of current and alternate address space page table maps
- * and directories.
+ * Address of current address space page table maps and directories.
  */
 #ifdef _KERNEL
 extern pt_entry_t PTmap[];