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MFi386 r1.369. Clear the PG_WRITEABLE flag in pmap_clear_write; return

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immediately if its already clear.

Suggested by:	alc
This commit is contained in:
Jake Burkholder 2002-11-17 01:17:07 +00:00
parent 84b427ce23
commit 7446769caf
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=106994
1 changed files with 3 additions and 1 deletions
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4
sys/sparc64/sparc64/pmap.c
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@ -1822,7 +1822,8 @@ pmap_clear_write(vm_page_t m)
{
struct tte *tp;
if ((m->flags & (PG_FICTITIOUS | PG_UNMANAGED)) != 0)
if ((m->flags & (PG_FICTITIOUS | PG_UNMANAGED)) != 0 ||
(m->flags & PG_WRITEABLE) == 0)
return;
STAILQ_FOREACH(tp, &m->md.tte_list, tte_link) {
if ((tp->tte_data & TD_PV) == 0)
@ -1836,6 +1837,7 @@ pmap_clear_write(vm_page_t m)
tlb_page_demap(TTE_GET_PMAP(tp), TTE_GET_VA(tp));
}
}
vm_page_flag_clear(m, PG_WRITEABLE);
}
int