Author: alc
Date: Wed Jan 21 06:32:32 2009
New Revision: 187520
URL: http://svn.freebsd.org/changeset/base/187520
Log:
MFC rev 177851
Optimize pmap_pml4e() and pmap_pdpe() based upon two observations: The
given pmap is never NULL, and therefore pmap_pml4e() can never return
NULL. The pervasive use of these inline functions throughout the pmap
makes these simple changes worthwhile.
Modified:
stable/7/sys/ (props changed)
stable/7/sys/amd64/amd64/pmap.c
stable/7/sys/contrib/pf/ (props changed)
stable/7/sys/dev/ath/ath_hal/ (props changed)
stable/7/sys/dev/cxgb/ (props changed)
Modified: stable/7/sys/amd64/amd64/pmap.c
==============================================================================
--- stable/7/sys/amd64/amd64/pmap.c Wed Jan 21 06:30:53 2009
(r187519)
+++ stable/7/sys/amd64/amd64/pmap.c Wed Jan 21 06:32:32 2009
(r187520)
@@ -290,8 +290,6 @@ static __inline pml4_entry_t *
pmap_pml4e(pmap_t pmap, vm_offset_t va)
{
- if (!pmap)
- return NULL;
return (&pmap->pm_pml4[pmap_pml4e_index(va)]);
}
@@ -312,7 +310,7 @@ pmap_pdpe(pmap_t pmap, vm_offset_t va)
pml4_entry_t *pml4e;
pml4e = pmap_pml4e(pmap, va);
- if (pml4e == NULL || (*pml4e & PG_V) == 0)
+ if ((*pml4e & PG_V) == 0)
return NULL;
return (pmap_pml4e_to_pdpe(pml4e, va));
}
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