Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6:
[IA64] Fix race in the accessed/dirty bit handlers
diff --git a/arch/ia64/kernel/ivt.S b/arch/ia64/kernel/ivt.S
index 9f80569..dcd906f 100644
--- a/arch/ia64/kernel/ivt.S
+++ b/arch/ia64/kernel/ivt.S
@@ -561,11 +561,12 @@
;; // avoid RAW on r18
mov ar.ccv=r18 // set compare value for cmpxchg
or r25=_PAGE_D|_PAGE_A,r18 // set the dirty and accessed bits
+ tbit.z p7,p6 = r18,_PAGE_P_BIT // Check present bit
;;
- cmpxchg8.acq r26=[r17],r25,ar.ccv
+(p6) cmpxchg8.acq r26=[r17],r25,ar.ccv // Only update if page is present
mov r24=PAGE_SHIFT<<2
;;
- cmp.eq p6,p7=r26,r18
+(p6) cmp.eq p6,p7=r26,r18 // Only compare if page is present
;;
(p6) itc.d r25 // install updated PTE
;;
@@ -626,11 +627,12 @@
;;
mov ar.ccv=r18 // set compare value for cmpxchg
or r25=_PAGE_A,r18 // set the accessed bit
+ tbit.z p7,p6 = r18,_PAGE_P_BIT // Check present bit
;;
- cmpxchg8.acq r26=[r17],r25,ar.ccv
+(p6) cmpxchg8.acq r26=[r17],r25,ar.ccv // Only if page present
mov r24=PAGE_SHIFT<<2
;;
- cmp.eq p6,p7=r26,r18
+(p6) cmp.eq p6,p7=r26,r18 // Only if page present
;;
(p6) itc.i r25 // install updated PTE
;;
@@ -680,11 +682,12 @@
;; // avoid RAW on r18
mov ar.ccv=r18 // set compare value for cmpxchg
or r25=_PAGE_A,r18 // set the dirty bit
+ tbit.z p7,p6 = r18,_PAGE_P_BIT // Check present bit
;;
- cmpxchg8.acq r26=[r17],r25,ar.ccv
+(p6) cmpxchg8.acq r26=[r17],r25,ar.ccv // Only if page is present
mov r24=PAGE_SHIFT<<2
;;
- cmp.eq p6,p7=r26,r18
+(p6) cmp.eq p6,p7=r26,r18 // Only if page is present
;;
(p6) itc.d r25 // install updated PTE
/*