From nobody Thu Jul 07 18:07:02 2022 X-Original-To: freebsd-current@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id BD1528D33D6 for ; Thu, 7 Jul 2022 18:07:10 +0000 (UTC) (envelope-from sgk@troutmask.apl.washington.edu) Received: from troutmask.apl.washington.edu (troutmask.apl.washington.edu [128.95.76.21]) (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 (2048 bits) client-digest SHA256) (Client CN "troutmask", Issuer "troutmask" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 4Lf4B12ZwKz3ncc; Thu, 7 Jul 2022 18:07:05 +0000 (UTC) (envelope-from sgk@troutmask.apl.washington.edu) Received: from troutmask.apl.washington.edu (localhost [127.0.0.1]) by troutmask.apl.washington.edu (8.16.1/8.16.1) with ESMTPS id 267I73Gt092554 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO); Thu, 7 Jul 2022 11:07:03 -0700 (PDT) (envelope-from sgk@troutmask.apl.washington.edu) Received: (from sgk@localhost) by troutmask.apl.washington.edu (8.16.1/8.16.1/Submit) id 267I73Ej092549; Thu, 7 Jul 2022 11:07:03 -0700 (PDT) (envelope-from sgk) Date: Thu, 7 Jul 2022 11:07:02 -0700 From: Steve Kargl To: Kristof Provost Cc: Warner Losh , Ryan Stone , FreeBSD Current Subject: Re: buildkernel is broken Message-ID: Reply-To: sgk@troutmask.apl.washington.edu References: <4FE3FF3B-9F2C-41BF-9F96-B8036055A9F6@FreeBSD.org> List-Id: Discussions about the use of FreeBSD-current List-Archive: https://lists.freebsd.org/archives/freebsd-current List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-current@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <4FE3FF3B-9F2C-41BF-9F96-B8036055A9F6@FreeBSD.org> X-Rspamd-Queue-Id: 4Lf4B12ZwKz3ncc X-Spamd-Bar: / Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=fail reason="No valid SPF, No valid DKIM" header.from=washington.edu (policy=none); spf=none (mx1.freebsd.org: domain of sgk@troutmask.apl.washington.edu has no SPF policy when checking 128.95.76.21) smtp.mailfrom=sgk@troutmask.apl.washington.edu X-Spamd-Result: default: False [-1.00 / 15.00]; NEURAL_HAM_SHORT(-1.00)[-0.998]; DMARC_POLICY_SOFTFAIL(0.10)[washington.edu : No valid SPF, No valid DKIM,none]; MIME_GOOD(-0.10)[text/plain]; MIME_TRACE(0.00)[0:+]; R_SPF_NA(0.00)[no SPF record]; MLMMJ_DEST(0.00)[freebsd-current]; ASN(0.00)[asn:73, ipnet:128.95.0.0/16, country:US]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; FREEMAIL_CC(0.00)[bsdimp.com,gmail.com,freebsd.org]; RCVD_TLS_LAST(0.00)[]; BLOCKLISTDE_FAIL(0.00)[128.95.76.21:query timed out]; TO_MATCH_ENVRCPT_SOME(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; ARC_NA(0.00)[]; TO_DN_ALL(0.00)[]; FROM_HAS_DN(0.00)[]; REPLYTO_ADDR_EQ_FROM(0.00)[]; RCPT_COUNT_THREE(0.00)[4]; RCVD_COUNT_THREE(0.00)[3]; HAS_REPLYTO(0.00)[sgk@troutmask.apl.washington.edu] X-ThisMailContainsUnwantedMimeParts: N On Thu, Jul 07, 2022 at 07:59:29PM +0200, Kristof Provost wrote: > On 7 Jul 2022, at 19:00, Steve Kargl wrote: > > > The fix in > > 37f604b49d4a seems rather questionable especially given > > that there is no comment about why the macro is expanded > > to a zero-trip loop. > > > I’m not sure how I could have been much more clear than this: > > VNET_FOREACH() is a LIST_FOREACH if VIMAGE is set, but empty if it's > not. This means that users of the macro couldn't use 'continue' or > 'break' as one would expect of a loop. Comments belong in the code. /* Kludge to prevent non-vimage kernels from choking to death. */ #define VNET_FOREACH(arg) for (int _vn = 0; _vn == 0; _vn++) -- Steve