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Avoid recomputing PHYS_TO_VM_PAGE() unnecessarily in pmap_protect().
This commit is contained in:
Alan Cox 2004-09-19 05:34:49 +00:00
parent 346763649a
commit 6134d96917
1 changed files with 2 additions and 1 deletions
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sys/alpha/alpha/pmap.c
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@ -1629,6 +1629,7 @@ pmap_protect(pmap_t pmap, vm_offset_t sva, vm_offset_t eva, vm_prot_t prot)
oldpte |= (PG_FOR | PG_FOE);
}
if ((oldpte & PG_FOW) == 0) {
if (m == NULL)
m = PHYS_TO_VM_PAGE(pmap_pte_pa(pte));
if (pmap_track_modified(sva))
vm_page_dirty(m);