Author: markj
Date: Tue Jun 4 17:25:45 2019
New Revision: 348639
URL: https://svnweb.freebsd.org/changeset/base/348639
Log:
MFC r342765:
Fix dirty bit handling in pmap_remove_write().
Modified:
stable/12/sys/riscv/riscv/pmap.c
Directory Properties:
stable/12/ (props changed)
Modified: stable/12/sys/riscv/riscv/pmap.c
==============================================================================
--- stable/12/sys/riscv/riscv/pmap.c Tue Jun 4 17:25:22 2019
(r348638)
+++ stable/12/sys/riscv/riscv/pmap.c Tue Jun 4 17:25:45 2019
(r348639)
@@ -2938,15 +2938,13 @@ retry_pv_loop:
}
}
l3 = pmap_l3(pmap, pv->pv_va);
-retry:
oldl3 = pmap_load(l3);
-
+retry:
if ((oldl3 & PTE_W) != 0) {
- newl3 = oldl3 & ~PTE_W;
- if (!atomic_cmpset_long(l3, oldl3, newl3))
+ newl3 = oldl3 & ~(PTE_D | PTE_W);
+ if (!atomic_fcmpset_long(l3, &oldl3, newl3))
goto retry;
- /* TODO: check for PTE_D? */
- if ((oldl3 & PTE_A) != 0)
+ if ((oldl3 & PTE_D) != 0)
vm_page_dirty(m);
pmap_invalidate_page(pmap, pv->pv_va);
}
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