diff options
| -rw-r--r-- | sys/alpha/alpha/pmap.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/sys/alpha/alpha/pmap.c b/sys/alpha/alpha/pmap.c index 24d6a0a..5da92e53 100644 --- a/sys/alpha/alpha/pmap.c +++ b/sys/alpha/alpha/pmap.c @@ -2734,7 +2734,9 @@ pmap_changebit(vm_page_t m, int bit, boolean_t setem) int changed; int s; - if (!pmap_initialized || (m->flags & PG_FICTITIOUS)) + if (!pmap_initialized || (m->flags & PG_FICTITIOUS) || + (!setem && bit == (PG_UWE|PG_KWE) && + (m->flags & PG_WRITEABLE) == 0)) return; s = splvm(); @@ -2776,6 +2778,8 @@ pmap_changebit(vm_page_t m, int bit, boolean_t setem) if (changed) pmap_invalidate_page(pv->pv_pmap, pv->pv_va); } + if (!setem && bit == (PG_UWE|PG_KWE)) + vm_page_flag_clear(m, PG_WRITEABLE); splx(s); } |
