Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 654F3C61DA4 for ; Mon, 6 Mar 2023 22:02:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229736AbjCFWCg (ORCPT ); Mon, 6 Mar 2023 17:02:36 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56264 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229628AbjCFWCe (ORCPT ); Mon, 6 Mar 2023 17:02:34 -0500 Received: from mail-ot1-x329.google.com (mail-ot1-x329.google.com [IPv6:2607:f8b0:4864:20::329]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4B1793D0AD for ; Mon, 6 Mar 2023 14:02:32 -0800 (PST) Received: by mail-ot1-x329.google.com with SMTP id p13-20020a9d744d000000b0069438f0db7eso6185891otk.3 for ; Mon, 06 Mar 2023 14:02:32 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; t=1678140151; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:sender:from:to:cc:subject:date:message-id :reply-to; bh=nuEAEFI5EQD7K+3QFd4pszSCuERvF7RMogtP8Z6GRIE=; b=Uv8oG0kvRYVuVqnyOptf8iadNwp1lDkJGwtBrgvZffzDxi15vYJByaJB9wqPrgxYIJ jCGBYl27PxJRPs3ZAN/p8yLTJ9FHa2kmazUtg4TfonyYDGiwMx8RvZvFFLxcSGiy9SJq k8wb9OFqbQFx2sl+HJOaZWKWBVIoWKpZrPDUfMOvQtS+b2Gd2rgiJtyBtLi6ARkIMwvG PQNWd+IP6SPxaackScmMv173BPSO5evtbEZwG9aTzcrKGs4KBWDgUdZSMrYLGzK0mWwZ DFFuOm9upul/4vZLUabDyO3Y8kTjxLPWn+gSc3HbQG76qqiCCFlyAe/DyHnmDNreQtd2 B7fQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1678140151; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:sender:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=nuEAEFI5EQD7K+3QFd4pszSCuERvF7RMogtP8Z6GRIE=; b=J0OtI4xocFWBVuavIEWegfGACcdmAjZJOHciJEjXkabptp5XEvCMoeEqtQT95MXKKZ vTruoUexzAs4Swe6jOi3UA3LhrHcL2HrJVFssVb4C4Q8LE1t0NlAKvTA0ZQmD/iaKkS8 jk90I82S3s3r3DfMjVW0BFkOiH/ieWuJN7g4bdWXWapjUhzReAkj2aQ2w9j8WjPPpwwe PqeIapvzcizmfFnLHJ2Ophnjq74alPc/CoMMFxmA6PqPa+gK97C6D5aUtAR82iOFJWlR zAnlAXID2yFeIVtccZ25B7IB+0ZXtcYP0GPcjTrDtukGM0DjRwSVs3VgUnL+RKSCBtZC eKRQ== X-Gm-Message-State: AO0yUKX99h+YnW3TZCTJpcHypGv+vct0CA+P+8JXyp34t9jmPCqvX3wk I58vWcfbTwXArqK9HFBT/KM= X-Google-Smtp-Source: AK7set/n6YiwWtMQOUsgRbNX3Lxj3bAs6mzDJD/K0aMKTPrikcspn8Vj3bK+NAwEM4YqLMgJHo5+8A== X-Received: by 2002:a05:6830:928:b0:68b:d61c:168f with SMTP id v40-20020a056830092800b0068bd61c168fmr5647683ott.11.1678140151443; Mon, 06 Mar 2023 14:02:31 -0800 (PST) Received: from server.roeck-us.net ([2600:1700:e321:62f0:329c:23ff:fee3:9d7c]) by smtp.gmail.com with ESMTPSA id n25-20020a9d7119000000b0068bd922a244sm4685280otj.20.2023.03.06.14.02.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 06 Mar 2023 14:02:30 -0800 (PST) Sender: Guenter Roeck Date: Mon, 6 Mar 2023 14:02:29 -0800 From: Guenter Roeck To: Linus Torvalds Cc: Linux Kernel Mailing List , Laurent Pinchart , Sakari Ailus , Arnd Bergmann , Josef Bacik , David Sterba Subject: Re: Linux 6.3-rc1 Message-ID: <42ace531-3a34-4dda-b253-89b1a8d9935c@roeck-us.net> References: <481b19b5-83a0-4793-b4fd-194ad7b978c3@roeck-us.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <481b19b5-83a0-4793-b4fd-194ad7b978c3@roeck-us.net> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > On Mon, Mar 06, 2023 at 08:52:38AM -0800, Guenter Roeck wrote: I forgot to actually copy the people I had planned to copy. Sorry for that; the unexpected crashes distracted me. Copied now. For those who have not seen this e-mail before: You are copied because you either submitted a patch causing a build failure in v6.3-rc1, or a fix for it. Guenter > On Sun, Mar 05, 2023 at 03:24:41PM -0800, Linus Torvalds wrote: > > So after several releases where the merge windows had something odd > > going on, we finally had just a regular "two weeks of just merge > > window". It was quite nice. > > > > In fact, it was quite nice in a couple of ways: not only didn't I have > > a hugely compressed merge window where I felt I had to cram as much as > > possible into the first few days, but the fact that we _have_ had a > > couple of merge windows where I really asked for people to have > > everything ready when the merge window opened seems to have set a > > pattern: the bulk of everything really did come in early. > > > > And again, that just makes the merge window work nicer for me, when I > > don't sit there waiting, knowing that there's stuff pending that just > > hasn't had a pull request done yet. > > > > So it all felt rather good. Of course, the fact that I had no machine > > issues, no holidays, and no travel coming up, then meant that I may > > have noticed a few more of the "people, please write good commit > > messages for merges" issues, so there's a possible downside to me not > > being as hurried as the last few merge windows have been. > > > > And of course, smooth or not, now that the merge window is closed, we > > need to make sure it all *works*. We had a couple of exciting merges > > already, and I think the fallout from that got sorted out, but I'm > > sure there's more to come. Let's hope the calming-down period of 6.3 > > works as well as the merge window did... Knock wood. > > > > Anyway, as always, the shortlog is much too large to post, since we > > had 12500+ commits (and that's not counting the merges - closer to a > > thousand of those). So below is just my usual merge log which gives > > only a very high-level view of what I merged and from who. It all > > looks fairly normal, with ~55% of the patch being drivers, ~20% being > > architecture updates. and the rest being the usual random mix > > (documentation, tooling, networking, filesystem, and just core kernel > > stuff). > > > > Please do test, > > > > Build results: > total: 153 pass: 146 fail: 7 > Failed builds: > alpha:allmodconfig > csky:allmodconfig > m68k:allmodconfig > openrisc:allmodconfig > parisc:allmodconfig > s390:allmodconfig > sparc64:allmodconfig > Qemu test results: > total: 511 pass: 459 fail: 52 > Failed tests: > arm:smdkc210:exynos_defconfig:cpuidle:nocrypto:mem128:exynos4210-smdkv310:initrd > arm:smdkc210:exynos_defconfig:cpuidle:nocrypto:sd2:mem128:exynos4210-smdkv310:rootfs > arm:realview-eb:realview_defconfig:realview_eb:mem512:net,default:arm-realview-eb:initrd > arm:mcimx6ul-evk:imx_v6_v7_defconfig:nodrm:mem256:net,nic:net,nic:imx6ul-14x14-evk:initrd > arm:mcimx6ul-evk:imx_v6_v7_defconfig:nodrm:sd:mem256:net,nic:net,nic:imx6ul-14x14-evk:rootfs > arm:mcimx6ul-evk:imx_v6_v7_defconfig:nodrm:usb0:mem256:net,nic:net,nic:imx6ul-14x14-evk:rootfs > arm:mcimx6ul-evk:imx_v6_v7_defconfig:nodrm:usb1:mem256:net,nic:net,nic:imx6ul-14x14-evk:rootfs > arm:mcimx7d-sabre:imx_v6_v7_defconfig:nodrm:mem256:net,nic:imx7d-sdb:initrd > arm:mcimx7d-sabre:imx_v6_v7_defconfig:nodrm:usb1:mem256:net,nic:imx7d-sdb:rootfs > arm:mcimx7d-sabre:imx_v6_v7_defconfig:nodrm:sd:mem256:net,nic:imx7d-sdb:rootfs > arm:vexpress-a9:multi_v7_defconfig:nolocktests:flash64:mem128:net,default:vexpress-v2p-ca9:rootfs > arm:sabrelite:multi_v7_defconfig:mem256:net,default:imx6dl-sabrelite:initrd > arm:sabrelite:multi_v7_defconfig:mmc1:mem256:net,default:imx6dl-sabrelite:rootfs > arm:sabrelite:multi_v7_defconfig:usb0:mem256:net,default:imx6dl-sabrelite:rootfs > arm:sabrelite:multi_v7_defconfig:usb1:mem256:net,default:imx6dl-sabrelite:rootfs > arm:xilinx-zynq-a9:multi_v7_defconfig:mem128:net,default:zynq-zc702:initrd > arm:xilinx-zynq-a9:multi_v7_defconfig:usb0:mem128:net,default:zynq-zc702:rootfs > arm:xilinx-zynq-a9:multi_v7_defconfig:sd:mem128:net,default:zynq-zc702:rootfs > arm:xilinx-zynq-a9:multi_v7_defconfig:sd:mem128:net,default:zynq-zc706:rootfs > arm:xilinx-zynq-a9:multi_v7_defconfig:usb0:mem128:zynq-zed:rootfs > arm:cubieboard:multi_v7_defconfig:mem512:net,default:sun4i-a10-cubieboard:initrd > arm:cubieboard:multi_v7_defconfig:usb:mem512:net,default:sun4i-a10-cubieboard:rootfs > arm:cubieboard:multi_v7_defconfig:sata:mem512:net,default:sun4i-a10-cubieboard:rootfs > arm:orangepi-pc:multi_v7_defconfig:net,nic:sun8i-h3-orangepi-pc:initrd > arm:orangepi-pc:multi_v7_defconfig:sd:net,nic:sun8i-h3-orangepi-pc:rootfs > arm:orangepi-pc:multi_v7_defconfig:usb0:net,nic:sun8i-h3-orangepi-pc:rootfs > arm:orangepi-pc:multi_v7_defconfig:usb1:net,nic:sun8i-h3-orangepi-pc:rootfs > ppc:mac99:ppc_book3s_defconfig:smp:ide:net,e1000:rootfs > ppc64:mac99:ppc64_book3s_defconfig:smp:net,ne2k_pci:initrd > ppc64:mac99:ppc64_book3s_defconfig:smp:net,pcnet:ide:rootfs > ppc64:mac99:ppc64_book3s_defconfig:smp:net,e1000:sdhci:mmc:rootfs > ppc64:mac99:ppc64_book3s_defconfig:smp:net,e1000e:nvme:rootfs > ppc64:mac99:ppc64_book3s_defconfig:smp:net,virtio-net:scsi[DC395]:rootfs > riscv:sifive_u:defconfig:net,default:initrd > riscv:sifive_u:defconfig:sd:net,default:rootfs > riscv:sifive_u:defconfig:mtd32:net,default:rootfs > sparc32:SS-4:nodebugobj:smp:scsi:net,default:hd > sparc32:SS-5:nodebugobj:smp:scsi:net,default:cd > sparc32:SS-10:nodebugobj:smp:scsi:net,default:hd > sparc32:SS-20:nodebugobj:smp:scsi:net,default:hd > sparc32:SS-600MP:nodebugobj:smp:scsi:net,default:hd > sparc32:Voyager:nodebugobj:smp:noapc:scsi:net,default:hd > i386:q35:Westmere-IBRS:defconfig:smp:efi32:scsi[53C810]:net,virtio-net-pci:hd > i386:q35:Opteron_G1:defconfig:smp:efi32:net,i82558a:initrd > i386:q35:core2duo:defconfig:smp:efi32:usb:net,i82559er:hd > i386:pc:Westmere:defconfig:pae:smp:efi32:usb:net,pcnet:hd > x86_64:q35:Conroe:defconfig:smp4:net,tulip:efi32:mem256:scsi[DC395]:hd > x86_64:q35:Opteron_G5:defconfig:smp4:net,i82559c:efi32:mem256:scsi[MEGASAS2]:hd > x86_64:q35:Opteron_G1:defconfig:smp2:net,i82562:efi:mem1G:initrd > x86_64:pc:Opteron_G2:defconfig:smp:net,usb:efi32:mem2G:scsi[virtio-pci]:hd > x86_64:pc:Opteron_G2:defconfig:smp:net,usb:efi32:mem2G:scsi[virtio-pci-old]:hd > x86_64:q35:Nehalem:defconfig:smp2:net,i82558a:efi32:mem1G:virtio:hd > > Guenter > > --- > Build failures: > > alpha:allmodconfig > arm:allmodconfig > csky:allmodconfig > m68k:allmodconfig > mips:allmodconfig > openrisc:allmodconfig > parisc:ppc32_allmodconfig > powerpc:ppc32_allmodconfig > s390:allmodconfig > xtensa:allmodconfig > > drivers/media/i2c/imx290.c:1090:12: error: 'imx290_runtime_suspend' defined but not used [-Werror=unused-function] > 1090 | static int imx290_runtime_suspend(struct device *dev) > | ^~~~~~~~~~~~~~~~~~~~~~ > drivers/media/i2c/imx290.c:1082:12: error: 'imx290_runtime_resume' defined but not used [-Werror=unused-function] > 1082 | static int imx290_runtime_resume(struct device *dev) > > Seen whenever CONFIG_PM_SLEEP is not enabled. Introduced by commit 02852c01f654 > ("media: i2c: imx290: Initialize runtime PM before subdev"); > > Caused by commit 02852c01f654 ("media: i2c: imx290: Initialize runtime PM before subdev"). > > Fix: https://patchwork.kernel.org/project/linux-media/patch/20230207161316.293923-1-arnd@kernel.org/ > > Cc: Laurent Pinchart > Cc: Sakari Ailus > Cc: Arnd Bergmann > --- > > sparc64:allmodconfig > parisc:allmodconfig > > fs/btrfs/inode.c: In function 'btrfs_lookup_dentry': > fs/btrfs/inode.c:5730:21: error: 'location.type' may be used uninitialized [-Werror=maybe-uninitialized] > 5730 | if (location.type == BTRFS_INODE_ITEM_KEY) { > | ~~~~~~~~^~~~~ > fs/btrfs/inode.c:5719:26: note: 'location' declared here > 5719 | struct btrfs_key location; > | ^~~~~~~~ > > Seen with gcc 11.x and later when trying to build sparc64 or parisc images. > Not observed with other architectures. > Caused (exposed) by commit 1ec49744ba83 ("btrfs: turn on -Wmaybe-uninitialized"). > The failing code is > > ret = btrfs_inode_by_name(BTRFS_I(dir), dentry, &location, &di_type); > if (ret < 0) > return ERR_PTR(ret); > > if (location.type == BTRFS_INODE_ITEM_KEY) { > > and in btrfs_inode_by_name(): > > ret = fscrypt_setup_filename(&dir->vfs_inode, &dentry->d_name, 1, &fname); > if (ret) > goto out; > > It appears that gcc believes that fscrypt_setup_filename() may return > a positive value. If that happens, location.type would indeed be > uninitialized. Changing the above code to > > ret = fscrypt_setup_filename(&dir->vfs_inode, &dentry->d_name, 1, &fname); > if (ret < 0) > goto out; > > or, alternatively, > > ret = btrfs_inode_by_name(BTRFS_I(dir), dentry, &location, &di_type); > if (ret) > return ERR_PTR(ret); > > would fix the problem. > > Side note: gcc on other architectures (e.g., x86) does _not_ report an error > even if btrfs_inode_by_name() is made to return a positive value without > initializing location.type. > > Fix: Not available as far as I know. > > Cc: Josef Bacik > Cc: David Sterba > > === > Runtime failures: > > Various crashes, affecting several architectures. > > [ 11.664666] BUG: unable to handle page fault for address: 000000000002d3db > [ 11.664827] #PF: supervisor read access in kernel mode > [ 11.664891] #PF: error_code(0x0000) - not-present page > [ 11.664983] PGD 800000000430d067 P4D 800000000430d067 PUD 41a2067 PMD 0 > [ 11.665179] Oops: 0000 [#1] PREEMPT SMP PTI > [ 11.665319] CPU: 0 PID: 273 Comm: dd Tainted: G N 6.3.0-rc1 #1 > [ 11.665463] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015 > [ 11.665602] RIP: 0010:__lock_acquire+0x5c6/0x2740 > [ 11.665819] Code: 00 83 f8 2f 0f 87 7c 08 00 00 3b 05 cc 62 a2 02 41 bd 01 00 00 00 0f 86 f6 00 00 00 89 05 ba 62 a2 02 e9 eb 00 00 00 45 31 ed <48> 81 3f a0 a8 52 b4 45 0f 45 e8 83 fe 01 0f 87 85 fa ff ff 89 f0 > [ 11.666011] RSP: 0018:ffffb0038039fbf8 EFLAGS: 00000046 > [ 11.666088] RAX: 0000000000000000 RBX: ffff8f1304238040 RCX: 0000000000000000 > [ 11.666163] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000002d3db > [ 11.666235] RBP: 000000000002d3db R08: 0000000000000001 R09: 0000000000000001 > [ 11.666315] R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000 > [ 11.666408] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 > [ 11.666504] FS: 00007f78c78e3b28(0000) GS:ffff8f130f000000(0000) knlGS:0000000000000000 > [ 11.666591] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 11.666655] CR2: 000000000002d3db CR3: 00000000042d2000 CR4: 00000000000006f0 > [ 11.666768] Call Trace: > [ 11.666873] > [ 11.666958] ? lock_acquire+0xcb/0x330 > [ 11.667043] lock_acquire+0xcb/0x330 > [ 11.667102] ? add_timer_on+0x92/0x150 > [ 11.667163] _raw_spin_lock+0x2b/0x40 > [ 11.667210] ? add_timer_on+0x92/0x150 > [ 11.667255] add_timer_on+0x92/0x150 > [ 11.667302] try_to_generate_entropy+0x256/0x280 > [ 11.667379] ? __pfx_entropy_timer+0x10/0x10 > [ 11.667436] ? inode_security+0x2e/0x70 > [ 11.667484] ? selinux_file_permission+0x11a/0x150 > [ 11.667539] urandom_read_iter+0x23/0x90 > [ 11.667583] vfs_read+0x226/0x2f0 > [ 11.667637] ksys_read+0x64/0xe0 > [ 11.667680] do_syscall_64+0x3f/0x90 > [ 11.667725] entry_SYSCALL_64_after_hwframe+0x72/0xdc > [ 11.667817] RIP: 0033:0x7f78c78a1be2 > [ 11.667965] Code: c3 8b 07 85 c0 75 24 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 e9 70 d2 ff ff 41 54 b8 02 00 00 00 49 89 f4 be 00 88 08 00 55 > [ 11.668127] RSP: 002b:00007ffe531be798 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 > [ 11.668209] RAX: ffffffffffffffda RBX: 00007f78c78e3b28 RCX: 00007f78c78a1be2 > [ 11.668276] RDX: 0000000000000020 RSI: 00007f78c78e4d00 RDI: 0000000000000000 > [ 11.668378] RBP: 00007f78c78e4d00 R08: 0000000000000000 R09: 0000000000000000 > [ 11.668451] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 > [ 11.668517] R13: 0000000000000000 R14: 00007f78c78e4d00 R15: 0000000000000000 > [ 11.668613] > [ 11.668669] Modules linked in: > [ 11.668794] CR2: 000000000002d3db > [ 11.669015] ---[ end trace 0000000000000000 ]--- > > Bisect (on arm): > > # bad: [fe15c26ee26efa11741a7b632e9f23b01aca4cc6] Linux 6.3-rc1 > # good: [b01fe98d34f3bed944a93bd8119fed80c856fad8] Merge tag 'i2c-for-6.3-rc1-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux > git bisect start 'HEAD' 'b01fe98d34f3' > # good: [1a90673e17b6bcc6b6e8c072015956a6204e0f2d] Merge tag 'pull-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs > git bisect good 1a90673e17b6bcc6b6e8c072015956a6204e0f2d > # good: [0fb7fb713461e44b12e72c292bf90ee300f40710] genirq/msi, platform-msi: Ensure that MSI descriptors are unreferenced > git bisect good 0fb7fb713461e44b12e72c292bf90ee300f40710 > # good: [7f9ec7d8169b5281eff2b907d8ffb1bf56045f73] Merge tag 'x86-urgent-2023-03-05' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip > git bisect good 7f9ec7d8169b5281eff2b907d8ffb1bf56045f73 > # good: [f915322fe014c5c515119381e886faf07b3c9d31] Merge tag 'v6.3-p2' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 > git bisect good f915322fe014c5c515119381e886faf07b3c9d31 > # bad: [596ff4a09b8981790e15572e8e7bc904df5835e7] cpumask: re-introduce constant-sized cpumask optimizations > git bisect bad 596ff4a09b8981790e15572e8e7bc904df5835e7 > # first bad commit: [596ff4a09b8981790e15572e8e7bc904df5835e7] cpumask: re-introduce constant-sized cpumask optimizations > > Reverting the bad commit fixes the problem. > > --- > There are also some recently introduced runtime warnings in calls from ct_nmi_enter() > which I am still trying to bisect. > > 28.758119] ------------[ cut here ]------------ > [ 28.758418] WARNING: CPU: 0 PID: 301 at kernel/locking/lockdep.c:5527 check_flags+0x170/0x258 > [ 28.759084] DEBUG_LOCKS_WARN_ON(current->softirqs_enabled) > [ 28.759127] Modules linked in: > [ 28.759652] CPU: 0 PID: 301 Comm: run.sh Tainted: G N 6.2.0-13115-gee3f96b16468 #1 > [ 28.759959] Hardware name: Freescale i.MX7 Dual (Device Tree) > [ 28.760324] unwind_backtrace from show_stack+0x10/0x14 > [ 28.760567] show_stack from dump_stack_lvl+0x68/0x90 > [ 28.760708] dump_stack_lvl from __warn+0x70/0x1e0 > [ 28.760863] __warn from warn_slowpath_fmt+0x118/0x230 > [ 28.761015] warn_slowpath_fmt from check_flags+0x170/0x258 > [ 28.761179] check_flags from lock_is_held_type+0x6c/0x308 > [ 28.761326] lock_is_held_type from rcu_read_lock_sched_held+0x3c/0x70 > [ 28.761505] rcu_read_lock_sched_held from trace_rcu_dyntick+0x7c/0x128 > [ 28.761698] trace_rcu_dyntick from ct_nmi_enter+0x6c/0xe4 > [ 28.761857] ct_nmi_enter from irq_enter+0x8/0x10 > [ 28.762021] irq_enter from generic_handle_arch_irq+0xc/0x64 > [ 28.762187] generic_handle_arch_irq from call_with_stack+0x18/0x20 > [ 28.762370] call_with_stack from __irq_svc+0x9c/0xbc > [ 28.762594] Exception stack(0xd1b15f60 to 0xd1b15fa8) > [ 28.762849] 5f60: ecac8b10 40000000 b6ec9418 c1c2607c 00000000 40000000 c557b00b 00000001 > [ 28.763056] 5f80: 00000b00 c0101278 c557b0f0 00000000 00000051 d1b15fb0 c01011c4 c0103c00 > [ 28.763249] 5fa0: 40000013 ffffffff > [ 28.763394] __irq_svc from vfp_support_entry+0x1c/0x30 > [ 28.763659] irq event stamp: 6348 > [ 28.763783] hardirqs last enabled at (6347): [] __und_usr+0x6c/0x98 > [ 28.764030] hardirqs last disabled at (6348): [] __irq_svc+0x54/0xbc > [ 28.764232] softirqs last enabled at (6328): [] vfp_sync_hwstate+0x48/0x8c > [ 28.764453] softirqs last disabled at (6326): [] vfp_sync_hwstate+0x0/0x8c > [ 28.764665] ---[ end trace 0000000000000000 ]--- > [ 28.764907] irq event stamp: 6348 > [ 28.765018] hardirqs last enabled at (6347): [] __und_usr+0x6c/0x98 > [ 28.765202] hardirqs last disabled at (6348): [] __irq_svc+0x54/0xbc > [ 28.765386] softirqs last enabled at (6328): [] vfp_sync_hwstate+0x48/0x8c > [ 28.765575] softirqs last disabled at (6326): [] vfp_sync_hwstate+0x0/0x8c