From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BBD3925A2A2; Mon, 24 Nov 2025 14:47:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.155.92.199 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763995643; cv=none; b=S6lFswagiqNCQRTDxFAAaNhraGg/+yXhb8m4VC5MOoj0ZXTmcNIqrvj7yeD0REMU6Jq6V6tHgKZbzrw2dJuHiz8xv7NrW5ZaqJvYEwOtr8+NIyv/19h4ZMIVOhxbN2040wP311PJ9E7VlwLkewxZJ4Ah+BvrEKvp4Mx8OLOSCV8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763995643; c=relaxed/simple; bh=yiFifTml1Lx3zfibWU9AALhA3/mXEh2DUuMMtTWyEUA=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=pmG3vEiIjznH6S/o1ExUb0oCFcCBB5rCltpaMPnpFE/Pz9ek/lAhLy9MDrYxlMullmTgXG5kItUlyFpguUQZZ7UXGdy6kVGVzQo5dSuqcDOhwF1La1vSeH0VuUjO9zdWpAt1II+DFMf0Z68Ckp0zdPSdTQD2cOvmax+cpzdztvc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=ddni10RE; arc=none smtp.client-ip=90.155.92.199 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="ddni10RE" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=WU+lbaw/scOXoisuB+QcmbXcf1mK6vqPPMnwMcleZEg=; b=ddni10REQYzK7+n8GqRUnAST8k n+KDfkq8MNO/RjjuOANonbTg948BGgw8Zq68u9O49QLIP71noItn2WVoUs3Oiy0Wi0VggX8cuYkix 2oTcVkad45dvgHUqG1BUD082lLKA9xcz02HQDMRAQES38YX8NCXjgc46c9qv/vH2OTDJzP+iVUEAG BsDVa6FI3drBUzRaOt6l0jXF7cWOkLbmflz7dg00bRQYjC1XABwu6aj+WCy4gKomQKZPf1JLkGhOF zT1n+QN2prVlwCadmv4WBHNy3cYYNy/9nugNYNrGHq2OY3TCB5WwIod9jr3MM4p06Q9MZLcVJezXv nRlpT2Qw==; Received: from 77-249-17-252.cable.dynamic.v4.ziggo.nl ([77.249.17.252] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.98.2 #2 (Red Hat Linux)) id 1vNWyu-00000003tu5-1RUo; Mon, 24 Nov 2025 13:51:52 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id 67EA83002A6; Mon, 24 Nov 2025 15:47:14 +0100 (CET) Date: Mon, 24 Nov 2025 15:47:14 +0100 From: Peter Zijlstra To: Boqun Feng Cc: Stephen Rothwell , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , Linux Kernel Mailing List , Linux Next Mailing List , ojeda@kernel.org, Danilo Krummrich , Alexandre Courbot , nouveau@lists.freedesktop.org, Alice Ryhl Subject: Re: linux-next: build failure after merge of the tip tree Message-ID: <20251124144714.GT3245006@noisy.programming.kicks-ass.net> References: <20251124231644.38d0303b@canb.auug.org.au> <20251124123249.GP4067720@noisy.programming.kicks-ass.net> Precedence: bulk X-Mailing-List: linux-next@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Mon, Nov 24, 2025 at 06:00:52AM -0800, Boqun Feng wrote: > On Mon, Nov 24, 2025 at 01:32:49PM +0100, Peter Zijlstra wrote: > > On Mon, Nov 24, 2025 at 11:16:44PM +1100, Stephen Rothwell wrote: > > > Hi all, > > > > > > After merging the tip tree, today's linux-next build (x86_64 allmodconfig) > > > failed like this: > > > > > > ERROR: modpost: "NULL" [drivers/gpu/nova-core/nova_core.ko] undefined! > > > > > > > Rust :/ > > > > So I have: > > > > $ make O=tmp-build LLVM=-22 allmodconfig > > $ make O=tmp-build LLVM=-22 rustavailable > > Rust is available! > > $ grep -e CONFIG_RUST= -e CONFIG_NOVA= tmp-build/.config > > $ > > > > Help ?!? > > > > [CC nova] > > On my system it seems that RANDSTRUCT=y prevents the enabling of RUST, > but I'm sure Danilo and Alexandre have better ideas about how to enable > nova-core. Ah, indeed, RANDSTRUCT seems to be messing things up. I tried disabling that, but then I need to manually enable random crap to get Nova happy and menuconfig isn't very nice. I really don't think rustavailable is doing a good job here. Strictly speaking yes, its available, but figuring out why things don't work is a giant pain in the arse. Now, lets see if frobbing Kconfig to disqualify RANDSTRUCT will let allmodconfig work better.