svn commit: r246596 - projects/amd64_xen_pv/sys/amd64/xen
Cherry G. Mathew
cherry at FreeBSD.org
Sat Feb 9 17:32:00 UTC 2013
Author: cherry
Date: Sat Feb 9 17:32:00 2013
New Revision: 246596
URL: http://svnweb.freebsd.org/changeset/base/246596
Log:
Remove misleading "Sign unmasking" from ma calculation.
Approved by: gibbs (implicit)
Modified:
projects/amd64_xen_pv/sys/amd64/xen/pmap.c
Modified: projects/amd64_xen_pv/sys/amd64/xen/pmap.c
==============================================================================
--- projects/amd64_xen_pv/sys/amd64/xen/pmap.c Sat Feb 9 17:26:14 2013 (r246595)
+++ projects/amd64_xen_pv/sys/amd64/xen/pmap.c Sat Feb 9 17:32:00 2013 (r246596)
@@ -957,9 +957,6 @@ pmap_kextract_ma(vm_offset_t va)
* effectively const.
*/
- const uint64_t SIGNMASK = (1UL << 48) - 1;
- va &= SIGNMASK; /* Remove sign extension */
-
mmu_map_t tptr = tbuf;
struct mmu_map_mbackend mb = {
@@ -980,7 +977,7 @@ pmap_kextract_ma(vm_offset_t va)
mmu_map_t_fini(tptr);
nomapping:
- return (ma & PG_FRAME) | (va & ~PG_FRAME);
+ return (ma & PG_FRAME) | (va & PAGE_MASK);
}
/***************************************************
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