FYI, we noticed the below changes on

https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
commit 187372a3b9faff68ed61c291d0135e6739e0dbdf ("direct-io: always call ->end_io if non-NULL")


[  401.980094] run fstests generic/299 at 2016-02-16 06:10:03
[  404.765985] EXT4-fs (sda8): mounted filesystem with ordered data mode. Opts: acl,user_xattr
[  415.148430] ------------[ cut here ]------------
[  415.153736] WARNING: CPU: 2 PID: 3999 at fs/ext4/inode.c:3315 ext4_direct_IO+0x56d/0x5b0()
[  415.164062] Modules linked in: dm_mod rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver netconsole sg sd_mod ata_generic pata_acpi x86_pkg_temp_thermal coretemp kvm_intel i915 eeepc_wmi kvm irqbypass asus_wmi drm_kms_helper syscopyarea crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel snd_hda_codec_hdmi sysfillrect sparse_keymap sysimgblt fb_sys_fops aesni_intel lrw gf128mul glue_helper ablk_helper snd_hda_codec_realtek snd_hda_codec_generic cryptd pata_via serio_raw rfkill ppdev ata_piix snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer pcspkr snd soundcore libata drm parport_pc parport tpm_infineon video shpchp wmi
[  415.226650] CPU: 2 PID: 3999 Comm: fio Not tainted 4.5.0-rc2-00001-g187372a #1
[  415.234599] Hardware name: System manufacturer System Product Name/P8H67-M PRO, BIOS 1002 04/01/2011
[  415.234951] systemd-journald[125]: Compressed data object 649 -> 484
[  415.251575]  ffffffff81be94d0 ffff8801943efb08 ffffffff81422e52 0000000000000000
[  415.259772]  ffff8801943efb40 ffffffff8107a476 00000008b4ee0000 ffff88019bea15b0
[  415.267973]  ffff8801943efbf8 ffff880194763e00 ffffffffffffffe4 ffff8801943efb50
[  415.276232] Call Trace:
[  415.279417]  [<ffffffff81422e52>] dump_stack+0x4b/0x69
[  415.285319]  [<ffffffff8107a476>] warn_slowpath_common+0x86/0xc0
[  415.292078]  [<ffffffff8107a56a>] warn_slowpath_null+0x1a/0x20
[  415.298673]  [<ffffffff81282a2d>] ext4_direct_IO+0x56d/0x5b0
[  415.305077]  [<ffffffff81280d50>] ? do_journal_get_write_access+0x90/0x90
[  415.312610]  [<ffffffff81289c2c>] ? ext4_dirty_inode+0x5c/0x70
[  415.319197]  [<ffffffff811719ea>] generic_file_direct_write+0xaa/0x170
[  415.326476]  [<ffffffff81171b70>] __generic_file_write_iter+0xc0/0x1f0
[  415.333758]  [<ffffffff8109f132>] ? __might_sleep+0x52/0xb0
[  415.340067]  [<ffffffff8127d201>] ext4_file_write_iter+0x141/0x430
[  415.346974]  [<ffffffff813ba1b1>] ? __inode_security_revalidate+0x51/0x70
[  415.354497]  [<ffffffff8127d0c0>] ? ext4_unwritten_wait+0xc0/0xc0
[  415.361326]  [<ffffffff8109f132>] ? __might_sleep+0x52/0xb0
[  415.367601]  [<ffffffff8127d0c0>] ? ext4_unwritten_wait+0xc0/0xc0
[  415.374379]  [<ffffffff81242436>] aio_run_iocb+0x226/0x290
[  415.380565]  [<ffffffff8109f132>] ? __might_sleep+0x52/0xb0
[  415.386840]  [<ffffffff8124344b>] ? do_io_submit+0x1ab/0x530
[  415.393186]  [<ffffffff8109f132>] ? __might_sleep+0x52/0xb0
[  415.399443]  [<ffffffff8124353d>] do_io_submit+0x29d/0x530
[  415.405627]  [<ffffffff812437e0>] SyS_io_submit+0x10/0x20
[  415.411718]  [<ffffffff818e012e>] entry_SYSCALL_64_fastpath+0x12/0x71
[  415.418858] ---[ end trace eff5f1e32037f32f ]---
[  415.809764] ------------[ cut here ]------------


To reproduce:

        git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
        cd lkp-tests
        bin/lkp install job.yaml  # job file is attached in this email
        bin/lkp run     job.yaml



Thanks,
Kernel Test Robot