From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.ozlabs.org (gandalf.ozlabs.org [150.107.74.76]) (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 0493B32572A; Mon, 17 Nov 2025 09:22:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=150.107.74.76 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763371344; cv=none; b=rD1YUReqMrbRF6y3iOS9/64PD/iMQT6wUdoDC0ITYiXMV/fFsI5RzBqpCiPiyMWs0HTYRuv2fvVYxsg60GGKYZ4iEqhUAvAKaTREUuU0b5WnEHL6kqzqDNBCdauawrCe+DFAZWqOF+ThQZm3eDIRLprsVG/x0+R5flqbBp8XTIc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763371344; c=relaxed/simple; bh=DIi/0XmquKzNKYXRwqwtS7+fB3TdyqKLarsmkNkw4EM=; h=Date:From:To:Cc:Subject:Message-ID:MIME-Version:Content-Type; b=I3GQsKW3i7g3Ylt5CDGvD+qo2VLgnDndqacRgA/PLyWGnYfH92reiAY1dOME+5DzmHivxhJJjYbDvIymlOpOQCCUJPpp+svG3QLc0LPVK9HZWIR9CE5YNUJ/PZsdS7EkEoQ96NgNJOd0dGmjYmLaiaTRn5y9Zrqjr8sByIyOaiI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=canb.auug.org.au; spf=pass smtp.mailfrom=canb.auug.org.au; dkim=pass (2048-bit key) header.d=canb.auug.org.au header.i=@canb.auug.org.au header.b=IHxN8YRD; arc=none smtp.client-ip=150.107.74.76 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=canb.auug.org.au Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=canb.auug.org.au Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=canb.auug.org.au header.i=@canb.auug.org.au header.b="IHxN8YRD" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=canb.auug.org.au; s=202503; t=1763371335; bh=9x8kYp7Jpw/lx1rAisDUm2/p5CHtb2B/pj8kJnLJIk0=; h=Date:From:To:Cc:Subject:From; b=IHxN8YRDHajY3U/sTTerfwq0n5xE/burKR3bGqvdtjcIlOoP5EIl4s5ApV8xNRVnF /5HbmnWGr1DMd9ktpr+CywhXjfENB1J++r1Z6OZQvxDvxLjcjNCigvC8XSkvahbgc9 0mkxLnkPuyYAoKi3D91HbsPV+zN8ebZ485uWJUYtqRuqe4RxwRs8/i1N71UQpO137S CpOWNjBSTznENi5h3SNzDCpIKjrNVZlSBvk6pGSy4dPjzHzeaKto93YxvQRSmxKIn7 /vH44qsl2b+inOzGpmZFg4n805cu8e9VrWESF090P1ZrzC2fXvQugkpE45gm4qvV2M iN+DBp2gNhgpA== Received: from authenticated.ozlabs.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange secp256r1 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mail.ozlabs.org (Postfix) with ESMTPSA id 4d92MC1jTSz4w1j; Mon, 17 Nov 2025 20:22:15 +1100 (AEDT) Date: Mon, 17 Nov 2025 20:22:14 +1100 From: Stephen Rothwell To: Andrew Morton Cc: Linux Kernel Mailing List , Linux Next Mailing List Subject: linux-next: boot warning from the final tree Message-ID: <20251117202214.4f710f02@canb.auug.org.au> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: multipart/signed; boundary="Sig_/VuvFhKsCczBNVzGvvUyuc=Y"; protocol="application/pgp-signature"; micalg=pgp-sha256 --Sig_/VuvFhKsCczBNVzGvvUyuc=Y Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable Hi all, Today's linux-next qemu boot (powerpc pseries_le_defconfig) produced this warning: ftrace: allocating 48915 entries in 288 pages ftrace: allocated 287 pages with 6 groups ------------[ cut here ]------------ DEBUG_LOCKS_WARN_ON(lock->magic !=3D lock) WARNING: kernel/locking/mutex.c:156 at mutex_lock+0xcc/0x100, CPU#0: swap= per/0/0 Modules linked in: CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.18.0-rc6-09359-g921087= e37218 #1 VOLUNTARY=20 Hardware name: IBM pSeries (emulated by qemu) POWER9 (architected) 0x4e12= 02 0xf000005 of:SLOF,HEAD hv:linux,kvm pSeries NIP: c00000000148041c LR: c000000001480418 CTR: 0000000000000000 REGS: c000000002957a10 TRAP: 0700 Not tainted (6.18.0-rc6-09359-g92108= 7e37218) MSR: 8000000002021033 CR: 24022240 XER: 000000= 00 CFAR: c00000000021123c IRQMASK: 3=20 GPR00: c000000001480418 c000000002957cb0 c000000001a3a100 000000000000002= 8=20 GPR04: 00000000ffffe04a c0000000026abe88 0000000000000001 000000000000004= b=20 GPR08: c0000000026abd28 0000000000000000 0000000000000000 000000004402224= 0=20 GPR12: 0000000000000000 c000000002ae9000 0000000000000000 0000000001bff43= 0=20 GPR16: 000000007e68f070 c00000007f79c480 c000000002969160 c000000002a0f5d= 8=20 GPR20: c0000000026a1138 c0000000026a1120 0000000000000000 c0000000019541b= 8=20 GPR24: c00000000218a480 c00000000296e1d0 000000007d612000 c00000000380be1= 0=20 GPR28: c00000000380be20 c00000000380be00 c000000002640100 c00000000380be2= 0=20 NIP [c00000000148041c] mutex_lock+0xcc/0x100 LR [c000000001480418] mutex_lock+0xc8/0x100 Call Trace: [c000000002957cb0] [c000000001480418] mutex_lock+0xc8/0x100 (unreliable) [c000000002957d20] [c00000000024a60c] alloc_workqueue_noprof+0x38c/0x8ec [c000000002957e00] [c00000000203018c] workqueue_init_early+0x4d8/0x6ec [c000000002957f30] [c000000002004448] start_kernel+0x74c/0xa4c [c000000002957fe0] [c00000000000e99c] start_here_common+0x1c/0x20 Code: 4182ffb4 3d2200f3 392971e4 81290000 2c090000 4082ffa0 3c82ffe0 3c62= ffe0 3884bfe0 3863bf68 4ad90d45 60000000 <0fe00000> 4bffff80 60000000 60000= 000=20 ---[ end trace 0000000000000000 ]--- rcu: Hierarchical RCU implementation. I have no idea what caused this. --=20 Cheers, Stephen Rothwell --Sig_/VuvFhKsCczBNVzGvvUyuc=Y Content-Type: application/pgp-signature Content-Description: OpenPGP digital signature -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEENIC96giZ81tWdLgKAVBC80lX0GwFAmka6UYACgkQAVBC80lX 0GzgbwgAnFk6uj+IW+qJoc+pgO4V5bGupdRFqdzt7QVciUOwny+sIIXwr5IR1quR dw14hpdfi03oL0jK8VTX1fhGo2Tf64ubdyPWXBcd/2S8FAl/skB/rjOCS9ThLiWn DqnJuP4Igc6IgSUXdUj2Berx10zNMug7gWXv7xyN/le+94LHaIMVCymcweiMvRlp SU+mUtWBwETseA1+nPufnh4fk967Tj8xwkJHwcHZ6Swt3JXQaxv47w/ANnU8RtkL 7FqL+6qQmoVXNuTJDccxscRSk0bJ2bIIyuqaNKT67tMHn+E4JKzghnB7PaCTxtXM o7lThBvmbPUfKB/oNBMohZj9WLanNw== =zRc/ -----END PGP SIGNATURE----- --Sig_/VuvFhKsCczBNVzGvvUyuc=Y--