From owner-svn-src-all@freebsd.org Wed Jun 27 22:00:51 2018 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 7EEBB101538D; Wed, 27 Jun 2018 22:00:51 +0000 (UTC) (envelope-from glebius@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 2E67475A15; Wed, 27 Jun 2018 22:00:51 +0000 (UTC) (envelope-from glebius@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 1001FD59; Wed, 27 Jun 2018 22:00:51 +0000 (UTC) (envelope-from glebius@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id w5RM0oUg029239; Wed, 27 Jun 2018 22:00:50 GMT (envelope-from glebius@FreeBSD.org) Received: (from glebius@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id w5RM0oED029238; Wed, 27 Jun 2018 22:00:50 GMT (envelope-from glebius@FreeBSD.org) Message-Id: <201806272200.w5RM0oED029238@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: glebius set sender to glebius@FreeBSD.org using -f From: Gleb Smirnoff Date: Wed, 27 Jun 2018 22:00:50 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r335748 - head/sys/kern X-SVN-Group: head X-SVN-Commit-Author: glebius X-SVN-Commit-Paths: head/sys/kern X-SVN-Commit-Revision: 335748 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.26 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: Wed, 27 Jun 2018 22:00:51 -0000 Author: glebius Date: Wed Jun 27 22:00:50 2018 New Revision: 335748 URL: https://svnweb.freebsd.org/changeset/base/335748 Log: Correct r335242. Use unsigned cast instead of abs(). Using abs() gives incorrect result when ticks has already wrapped, and are about to reach the cr_ticks value (cr_ticks - ticks < hz). Submitted by: bde Modified: head/sys/kern/subr_counter.c Modified: head/sys/kern/subr_counter.c ============================================================================== --- head/sys/kern/subr_counter.c Wed Jun 27 21:36:57 2018 (r335747) +++ head/sys/kern/subr_counter.c Wed Jun 27 22:00:50 2018 (r335748) @@ -140,7 +140,7 @@ counter_ratecheck(struct counter_rate *cr, int64_t lim val = cr->cr_over; now = ticks; - if (abs(now - cr->cr_ticks) >= hz) { + if ((u_int)(now - cr->cr_ticks) >= hz) { /* * Time to clear the structure, we are in the next second. * First try unlocked read, and then proceed with atomic. @@ -151,7 +151,7 @@ counter_ratecheck(struct counter_rate *cr, int64_t lim * Check if other thread has just went through the * reset sequence before us. */ - if (abs(now - cr->cr_ticks) >= hz) { + if ((u_int)(now - cr->cr_ticks) >= hz) { val = counter_u64_fetch(cr->cr_rate); counter_u64_zero(cr->cr_rate); cr->cr_over = 0;