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Code Issues Releases Activity

Add some lock assertions. Lock a small part of pmap_enter().

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This commit is contained in:
Alan Cox 2004-06-16 07:51:19 +00:00
parent 65d476e0e0
commit d7c3bd4918
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=130577
1 changed files with 4 additions and 0 deletions
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4
sys/amd64/amd64/pmap.c
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@ -1438,6 +1438,7 @@ pmap_remove_entry(pmap_t pmap, vm_page_t m, vm_offset_t va)
pv_entry_t pv;
int rtval;
PMAP_LOCK_ASSERT(pmap, MA_OWNED);
mtx_assert(&vm_page_queue_mtx, MA_OWNED);
if (m->md.pv_list_count < pmap->pm_stats.resident_count) {
TAILQ_FOREACH(pv, &m->md.pv_list, pv_list) {
@ -1498,6 +1499,7 @@ pmap_remove_pte(pmap_t pmap, pt_entry_t *ptq, vm_offset_t va)
pt_entry_t oldpte;
vm_page_t m, mpte;
PMAP_LOCK_ASSERT(pmap, MA_OWNED);
oldpte = pte_load_clear(ptq);
if (oldpte & PG_W)
pmap->pm_stats.wired_count -= 1;
@ -1943,7 +1945,9 @@ pmap_enter(pmap_t pmap, vm_offset_t va, vm_page_t m, vm_prot_t prot,
if (opa) {
int err;
vm_page_lock_queues();
PMAP_LOCK(pmap);
err = pmap_remove_pte(pmap, pte, va);
PMAP_UNLOCK(pmap);
vm_page_unlock_queues();
if (err)
panic("pmap_enter: pte vanished, va: 0x%lx", va);