The rsm psr.dt in page_not_present, key_permission, iaccess_rights and daccess_right are not necessary. Since there is no data access between those points to page_fault, and page_fault will enable psr.dt at the beginning. Sign-off-by: Zou Nan hai <nanhai.zou@xxxxxxxxx> --- linux-2.6.18/arch/ia64/kernel/ivt.S 2006-10-18 00:15:11.000000000 +0800 +++ linux-2.6.18-fix/arch/ia64/kernel/ivt.S 2006-10-18 00:39:48.000000000 +0800 @@ -1201,7 +1201,6 @@ END(dispatch_to_fault_handler) ENTRY(page_not_present) DBG_FAULT(20) mov r16=cr.ifa - rsm psr.dt /* * The Linux page fault handler doesn't expect non-present pages to be in * the TLB. Flush the existing entry now, so we meet that expectation. @@ -1211,7 +1210,6 @@ ENTRY(page_not_present) ptc.l r16,r17 ;; mov r31=pr - srlz.d br.sptk.many page_fault END(page_not_present) @@ -1221,10 +1219,8 @@ END(page_not_present) ENTRY(key_permission) DBG_FAULT(21) mov r16=cr.ifa - rsm psr.dt mov r31=pr ;; - srlz.d br.sptk.many page_fault END(key_permission) @@ -1234,10 +1230,8 @@ END(key_permission) ENTRY(iaccess_rights) DBG_FAULT(22) mov r16=cr.ifa - rsm psr.dt mov r31=pr ;; - srlz.d br.sptk.many page_fault END(iaccess_rights) @@ -1247,10 +1241,8 @@ END(iaccess_rights) ENTRY(daccess_rights) DBG_FAULT(23) mov r16=cr.ifa - rsm psr.dt mov r31=pr ;; - srlz.d br.sptk.many page_fault END(daccess_rights) - To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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