diff options
Diffstat (limited to 'libpager/lock-object.c')
| -rw-r--r-- | libpager/lock-object.c | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/libpager/lock-object.c b/libpager/lock-object.c index d2f6da6d..5182eff8 100644 --- a/libpager/lock-object.c +++ b/libpager/lock-object.c @@ -1,5 +1,5 @@ /* Synchronous wrapper for memory_object_lock_request - Copyright (C) 1993, 1994, 1996 Free Software Foundation + Copyright (C) 1993, 1994, 1996, 1997 Free Software Foundation This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as @@ -30,9 +30,8 @@ _pager_lock_object (struct pager *p, vm_prot_t lock_value, int sync) { - struct lock_request *lr = 0; - char *pm_entries; int i; + struct lock_request *lr = 0; mutex_lock (&p->interlock); if (p->pager_state != NORMAL) @@ -85,10 +84,20 @@ _pager_lock_object (struct pager *p, if (should_flush) { + vm_offset_t pm_offs = offset / __vm_page_size; + _pager_pagemap_resize (p, offset + size); - pm_entries = &p->pagemap[offset / __vm_page_size]; - for (i = 0; i < size / vm_page_size; i++) - pm_entries[i] &= ~PM_INCORE; + if (p->pagemapsize > pm_offs) + { + char *pm_entries = &p->pagemap[pm_offs]; + vm_offset_t bound = size / vm_page_size; + + if (bound > p->pagemapsize) + bound = p->pagemapsize; + + for (i = 0; i < bound; i++) + pm_entries[i] &= ~PM_INCORE; + } } } |