From owner-dev-commits-src-branches@freebsd.org Tue Aug 31 19:09:42 2021 Return-Path: Delivered-To: dev-commits-src-branches@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 8FBAE67390F; Tue, 31 Aug 2021 19:09:42 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4GzcFL3XPzz4sfq; Tue, 31 Aug 2021 19:09:42 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 58BD917489; Tue, 31 Aug 2021 19:09:42 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org ([127.0.1.44]) by gitrepo.freebsd.org (8.16.1/8.16.1) with ESMTP id 17VJ9gus074121; Tue, 31 Aug 2021 19:09:42 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.16.1/8.16.1/Submit) id 17VJ9gQh074120; Tue, 31 Aug 2021 19:09:42 GMT (envelope-from git) Date: Tue, 31 Aug 2021 19:09:42 GMT Message-Id: <202108311909.17VJ9gQh074120@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org From: Mark Johnston Subject: git: 52d50956b826 - stable/13 - arm64: remove an unneeded test from pmap_clear_modify() MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: markj X-Git-Repository: src X-Git-Refname: refs/heads/stable/13 X-Git-Reftype: branch X-Git-Commit: 52d50956b826d602b2fcf5d97cd587d4d0ded942 Auto-Submitted: auto-generated X-BeenThere: dev-commits-src-branches@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Commits to the stable branches of the FreeBSD src repository List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 31 Aug 2021 19:09:42 -0000 The branch stable/13 has been updated by markj: URL: https://cgit.FreeBSD.org/src/commit/?id=52d50956b826d602b2fcf5d97cd587d4d0ded942 commit 52d50956b826d602b2fcf5d97cd587d4d0ded942 Author: Alan Cox AuthorDate: 2021-06-23 05:10:20 +0000 Commit: Mark Johnston CommitDate: 2021-08-31 19:09:22 +0000 arm64: remove an unneeded test from pmap_clear_modify() The page table entry for a 4KB page mapping must be valid if a PV entry for the mapping exists, so there is no point in testing each page table entry's validity when iterating over a PV list. Reviewed by: kib, markj (cherry picked from commit 62ea198e95f139e6b8041ec44f75d65aa26970d0) --- sys/arm64/arm64/pmap.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/sys/arm64/arm64/pmap.c b/sys/arm64/arm64/pmap.c index 8670056e81f5..0df53a60bcea 100644 --- a/sys/arm64/arm64/pmap.c +++ b/sys/arm64/arm64/pmap.c @@ -5873,8 +5873,7 @@ restart: l2 = pmap_l2(pmap, pv->pv_va); l3 = pmap_l2_to_l3(l2, pv->pv_va); oldl3 = pmap_load(l3); - if (pmap_l3_valid(oldl3) && - (oldl3 & (ATTR_S1_AP_RW_BIT | ATTR_SW_DBM)) == ATTR_SW_DBM){ + if ((oldl3 & (ATTR_S1_AP_RW_BIT | ATTR_SW_DBM)) == ATTR_SW_DBM){ pmap_set_bits(l3, ATTR_S1_AP(ATTR_S1_AP_RO)); pmap_invalidate_page(pmap, pv->pv_va); }