Module Name: src
Committed By: reinoud
Date: Tue Aug 30 10:44:06 UTC 2011
Modified Files:
src/sys/arch/usermode/usermode: pmap.c
Log Message:
Implement pmap_destroy() following Ben Harris's template
To generate a diff of this commit:
cvs rdiff -u -r1.41 -r1.42 src/sys/arch/usermode/usermode/pmap.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/arch/usermode/usermode/pmap.c
diff -u src/sys/arch/usermode/usermode/pmap.c:1.41 src/sys/arch/usermode/usermode/pmap.c:1.42
--- src/sys/arch/usermode/usermode/pmap.c:1.41 Tue Aug 30 10:37:42 2011
+++ src/sys/arch/usermode/usermode/pmap.c Tue Aug 30 10:44:06 2011
@@ -1,4 +1,4 @@
-/* $NetBSD: pmap.c,v 1.41 2011/08/30 10:37:42 reinoud Exp $ */
+/* $NetBSD: pmap.c,v 1.42 2011/08/30 10:44:06 reinoud Exp $ */
/*-
* Copyright (c) 2011 Reinoud Zandijk <[email protected]>
@@ -27,7 +27,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.41 2011/08/30 10:37:42 reinoud Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.42 2011/08/30 10:44:06 reinoud Exp $");
#include "opt_memsize.h"
#include "opt_kmempages.h"
@@ -356,7 +356,24 @@
void
pmap_destroy(pmap_t pmap)
{
-aprint_debug("pmap_destroy not implemented!\n");
+ int i;
+
+ /* if multiple references exist just remove a reference */
+ aprint_debug("pmap_destroy %p\n", pmap);
+ if (--pmap->pm_count > 0)
+ return;
+
+ /* safe guard against silly errors */
+ KASSERT((pmap->pm_flags & PM_ACTIVE) == 0);
+ KASSERT(pmap->pm_stats.resident_count == 0);
+ KASSERT(pmap->pm_stats.wired_count == 0);
+#ifdef DIAGNOSTIC
+ for (i = 0; i < pm_nentries; i++)
+ if (pmap->pm_entries[i] != NULL)
+ panic("pmap_destroy: pmap isn't empty");
+#endif
+ free((void *)pmap->pm_entries, M_VMPMAP);
+ pool_put(&pmap_pool, pmap);
}
void
