From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 B3C7E2036FD; Tue, 15 Oct 2024 18:46:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729017992; cv=none; b=P4oIWTNFRZZqSDN0JsaMC7/cj5hNHizjyIiOo4lBguT2PaOUxHuntn+q+jMPXKKzUk13yofGVuhTACywGUdOOiyNC+ki1bifui5PKYFk8AWljSmCrLQsPpQeMXMp+SfL0hurizCFEcuPmjZKOdXlivZQEaHJALGemgcd0qxXebU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729017992; c=relaxed/simple; bh=IcQWXDVp99Vj0zsLUJ8llRCrF3fgWdLU9cqR2tSgiFM=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=OpQHOuYG1zjBE7X0JNvXz8cir5jnYMnq5aQRJF5gmoOAs2NT2Crd1ReMOKIPHzJis+MJ/FraVjQ/7UdkEAHaEuzDR/W7YHLc2JZlhb60mcw6P0excTEHv7uHCbHB+mOg2/Ju2FvYlYLGI6M7sPdJSCUliRbkIuN/UYfVNddza8U= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=RKZFMhTO; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="RKZFMhTO" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3F8CCC4CEC6; Tue, 15 Oct 2024 18:46:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1729017991; bh=IcQWXDVp99Vj0zsLUJ8llRCrF3fgWdLU9cqR2tSgiFM=; h=Date:From:To:Cc:Subject:Reply-To:References:In-Reply-To:From; b=RKZFMhTOtrlyB5ROH54YzCYKyHj6fxNs7Ga+NIcnbAGqJujrMW+GCDxzWUivUH+8l ZvuPEr0ZPOjoxeNPe+pFqtkVVZ+iw9K0YCUGmhILF247HlTw08V/gS4idalvcgsgLG i+HnVNQc7Z/bF+3UaVRXXkkBNR06cT5luzRpAY1W8tl4R7hq1wWxb4f4eFYpn7WZ96 xvZNxnR78QhWT2cppvCBID/GWvWdUW+NgolrufSZ/5mNSby1vOiPmWsxSThj+wNtsA T7zrb/KxSPOv6z9X9qtFHYetyz7aulO3GEu8HgHN2/+pkrc1Vumq9lgZ1gk7RKNNJl caccCFyzpN6Tw== Received: by paulmck-ThinkPad-P17-Gen-1.home (Postfix, from userid 1000) id DD497CE098E; Tue, 15 Oct 2024 11:46:30 -0700 (PDT) Date: Tue, 15 Oct 2024 11:46:30 -0700 From: "Paul E. McKenney" To: Dmitry Torokhov Cc: bentiss@kernel.org, sfr@canb.auug.org.au, linux-kernel@vger.kernel.org, linux-next@vger.kernel.org, linux-toolchains@vger.kernel.org, jpoimboe@kernel.org Subject: Re: [BUG] -next objtool build failure (bisected) Message-ID: <3d0ae79c-ed26-414e-8594-c83c91040551@paulmck-laptop> Reply-To: paulmck@kernel.org References: Precedence: bulk X-Mailing-List: linux-toolchains@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 Tue, Oct 15, 2024 at 11:33:11AM -0700, Dmitry Torokhov wrote: > Hi Paul, > > On Tue, Oct 15, 2024 at 11:10:11AM -0700, Paul E. McKenney wrote: > > Hello! > > > > The next-20241011 release gets me build errors like the following: > > > > vmlinux.o: warning: objtool: fetch_item() falls through to next function > > > > Bisection leads me here: > > > > 61595012f280 ("HID: simplify code in fetch_item()") > > > > This diff looks inoffensive to me, but I get this error on this commit > > and not on its predecessor. > > > > This build failure happens on quite a few different kernel configurations. > > I bisected using this particular reproducer: > > > > tools/testing/selftests/rcutorture/bin/kvm.sh --allcpus --buildonly --configs SRCU-T > > > > Thoughts? > > I just added you to another thread where Nathan proposed a couple of > solutions: > > https://lore.kernel.org/r/20241010222451.GA3571761@thelio-3990X Thank you, Dmitry! Glad that it is not just me? ;-) Thanx, Paul