From owner-svn-src-all@freebsd.org Fri Jun 14 03:15:55 2019 Return-Path: Delivered-To: svn-src-all@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 5299215C4282; Fri, 14 Jun 2019 03:15:55 +0000 (UTC) (envelope-from dougm@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) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id E75C680BC3; Fri, 14 Jun 2019 03:15:54 +0000 (UTC) (envelope-from dougm@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id B95E59E6A; Fri, 14 Jun 2019 03:15:54 +0000 (UTC) (envelope-from dougm@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id x5E3Fs8L055751; Fri, 14 Jun 2019 03:15:54 GMT (envelope-from dougm@FreeBSD.org) Received: (from dougm@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x5E3FsGg055750; Fri, 14 Jun 2019 03:15:54 GMT (envelope-from dougm@FreeBSD.org) Message-Id: <201906140315.x5E3FsGg055750@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: dougm set sender to dougm@FreeBSD.org using -f From: Doug Moore Date: Fri, 14 Jun 2019 03:15:54 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r349030 - head/sys/vm X-SVN-Group: head X-SVN-Commit-Author: dougm X-SVN-Commit-Paths: head/sys/vm X-SVN-Commit-Revision: 349030 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: E75C680BC3 X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.95 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_HAM_MEDIUM(-1.00)[-0.998,0]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; NEURAL_HAM_SHORT(-0.95)[-0.954,0]; ASN(0.00)[asn:11403, ipnet:2610:1c1:1::/48, country:US] X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 14 Jun 2019 03:15:55 -0000 Author: dougm Date: Fri Jun 14 03:15:54 2019 New Revision: 349030 URL: https://svnweb.freebsd.org/changeset/base/349030 Log: Avoid using the prev field of vm_map_entry_t in two functions that iterate over consecutive vm_map entries, and that can easily just 'remember' the prev value instead of looking it up. Approved by: kib (mentor) Differential Revision: https://reviews.freebsd.org/D20628 Modified: head/sys/vm/vm_map.c Modified: head/sys/vm/vm_map.c ============================================================================== --- head/sys/vm/vm_map.c Fri Jun 14 01:09:10 2019 (r349029) +++ head/sys/vm/vm_map.c Fri Jun 14 03:15:54 2019 (r349030) @@ -734,18 +734,17 @@ SYSCTL_INT(_debug, OID_AUTO, vmmap_check, CTLFLAG_RWTU static void _vm_map_assert_consistent(vm_map_t map) { - vm_map_entry_t entry; - vm_map_entry_t child; + vm_map_entry_t child, entry, prev; vm_size_t max_left, max_right; if (!enable_vmmap_check) return; - for (entry = map->header.next; entry != &map->header; - entry = entry->next) { - KASSERT(entry->prev->end <= entry->start, + for (prev = &map->header; (entry = prev->next) != &map->header; + prev = entry) { + KASSERT(prev->end <= entry->start, ("map %p prev->end = %jx, start = %jx", map, - (uintmax_t)entry->prev->end, (uintmax_t)entry->start)); + (uintmax_t)prev->end, (uintmax_t)entry->start)); KASSERT(entry->start < entry->end, ("map %p start = %jx, end = %jx", map, (uintmax_t)entry->start, (uintmax_t)entry->end)); @@ -762,7 +761,7 @@ _vm_map_assert_consistent(vm_map_t map) (uintmax_t)entry->start, (uintmax_t)entry->right->start)); child = entry->left; max_left = (child != NULL) ? child->max_free : - entry->start - entry->prev->end; + entry->start - prev->end; child = entry->right; max_right = (child != NULL) ? child->max_free : entry->next->start - entry->end; @@ -4811,15 +4810,15 @@ vm_map_pmap_KBI(vm_map_t map) static void vm_map_print(vm_map_t map) { - vm_map_entry_t entry; + vm_map_entry_t entry, prev; db_iprintf("Task map %p: pmap=%p, nentries=%d, version=%u\n", (void *)map, (void *)map->pmap, map->nentries, map->timestamp); db_indent += 2; - for (entry = map->header.next; entry != &map->header; - entry = entry->next) { + for (prev = &map->header; (entry = prev->next) != &map->header; + prev = entry) { db_iprintf("map entry %p: start=%p, end=%p, eflags=%#x, \n", (void *)entry, (void *)entry->start, (void *)entry->end, entry->eflags); @@ -4830,7 +4829,8 @@ vm_map_print(vm_map_t map) db_iprintf(" prot=%x/%x/%s", entry->protection, entry->max_protection, - inheritance_name[(int)(unsigned char)entry->inheritance]); + inheritance_name[(int)(unsigned char) + entry->inheritance]); if (entry->wired_count != 0) db_printf(", wired"); } @@ -4838,9 +4838,9 @@ vm_map_print(vm_map_t map) db_printf(", share=%p, offset=0x%jx\n", (void *)entry->object.sub_map, (uintmax_t)entry->offset); - if ((entry->prev == &map->header) || - (entry->prev->object.sub_map != - entry->object.sub_map)) { + if (prev == &map->header || + prev->object.sub_map != + entry->object.sub_map) { db_indent += 2; vm_map_print((vm_map_t)entry->object.sub_map); db_indent -= 2; @@ -4860,9 +4860,9 @@ vm_map_print(vm_map_t map) (entry->eflags & MAP_ENTRY_NEEDS_COPY) ? "needed" : "done"); db_printf("\n"); - if ((entry->prev == &map->header) || - (entry->prev->object.vm_object != - entry->object.vm_object)) { + if (prev == &map->header || + prev->object.vm_object != + entry->object.vm_object) { db_indent += 2; vm_object_print((db_expr_t)(intptr_t) entry->object.vm_object,