diff options
| -rw-r--r-- | sys/ia64/ia64/pmap.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/sys/ia64/ia64/pmap.c b/sys/ia64/ia64/pmap.c index cc271c6..3dea505 100644 --- a/sys/ia64/ia64/pmap.c +++ b/sys/ia64/ia64/pmap.c @@ -2213,6 +2213,8 @@ pmap_page_protect(vm_page_t m, vm_prot_t prot) if ((prot & VM_PROT_WRITE) != 0) return; if (prot & (VM_PROT_READ | VM_PROT_EXECUTE)) { + if ((m->flags & PG_WRITEABLE) == 0) + return; TAILQ_FOREACH(pv, &m->md.pv_list, pv_list) { int newprot = pte_prot(pv->pv_pmap, prot); pmap_t oldpmap = pmap_install(pv->pv_pmap); @@ -2223,6 +2225,7 @@ pmap_page_protect(vm_page_t m, vm_prot_t prot) pmap_invalidate_page(pv->pv_pmap, pv->pv_va); pmap_install(oldpmap); } + vm_page_flag_clear(m, PG_WRITEABLE); } else { pmap_remove_all(m); } |
