svn commit: r355991 - head/sys/amd64/amd64

[Alan Cox]

Author: alc
Date: Sat Dec 21 22:32:24 2019
New Revision: 355991
URL: https://svnweb.freebsd.org/changeset/base/355991

Log:
  Micro-optimize the control flow in _pmap_unwire_ptp(), and eliminate
  unnecessary parentheses.
  
  Reviewed by:	kib, markj
  MFC after:	1 week
  Differential Revision:	https://reviews.freebsd.org/D22893

Modified:
  head/sys/amd64/amd64/pmap.c

Modified: head/sys/amd64/amd64/pmap.c
==============================================================================
--- head/sys/amd64/amd64/pmap.c	Sat Dec 21 21:05:53 2019	(r355990)
+++ head/sys/amd64/amd64/pmap.c	Sat Dec 21 22:32:24 2019	(r355991)
@@ -3542,7 +3542,7 @@ _pmap_unwire_ptp(pmap_t pmap, vm_offset_t va, vm_page_
 	/*
 	 * unmap the page table page
 	 */
-	if (m->pindex >= (NUPDE + NUPDPE)) {
+	if (m->pindex >= NUPDE + NUPDPE) {
 		/* PDP page */
 		pml4_entry_t *pml4;
 		pml4 = pmap_pml4e(pmap, va);
@@ -3569,8 +3569,7 @@ _pmap_unwire_ptp(pmap_t pmap, vm_offset_t va, vm_page_
 
 		pdpg = PHYS_TO_VM_PAGE(*pmap_pdpe(pmap, va) & PG_FRAME);
 		pmap_unwire_ptp(pmap, va, pdpg, free);
-	}
-	if (m->pindex >= NUPDE && m->pindex < (NUPDE + NUPDPE)) {
+	} else if (m->pindex < NUPDE + NUPDPE) {
 		/* We just released a PD, unhold the matching PDP */
 		vm_page_t pdppg;