[Regression][Trusty][3.13.0-37] LP:1376245: Please revert the patch 79605e758aab

[Pranith Kumar]

Hello,

As mentioned in this bug report:

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1376245

I recently started to see this WARNING on my desktop machine.

[211141.506974] WARNING: CPU: 0 PID: 7776 at fs/proc/generic.c:511
remove_proc_entry+0x125/0x180()
[211141.506974] name 'fs/nfsfs'
[211141.506974] Modules linked in: pci_stub vboxpci(O) vboxnetadp(O)
vboxnetflt(O) vboxdrv(O) nvidia(PO) mxm_wmi joydev ghash_clmulni_intel
aesni_intel aes_x86_64 glue_helper lrw gf128mul ablk_helper cryptd
lpc_ich serio_raw mfd_core parport_pc parport wmi  firewire_ohci
firewire_core crc_itu_t e1000e
[211141.506980] CPU: 0 PID: 7776 Comm: kworker/u16:1 Tainted: P
W  O 3.13.11.8+ #7
[211141.506981] Hardware name:                  /DZ77GA-70K, BIOS
GAZ7711H.86A.0059.2012.1106.1053 11/06/2012
[211141.506982] Workqueue: netns cleanup_net
[211141.506982]  0000000000000009 ffff8800cfdebc98 ffffffff817ca2ae
ffff8800cfdebce0
[211141.506983]  ffff8800cfdebcd0 ffffffff81045628 0000000000000000
0000000000000005
[211141.506984]  ffffffff819c26b4 ffffffff819c26b7 ffff88040e0059b0
ffff8800cfdebd30
[211141.506985] Call Trace:
[211141.506986]  [<ffffffff817ca2ae>] dump_stack+0x45/0x56
[211141.506988]  [<ffffffff81045628>] warn_slowpath_common+0x78/0xa0
[211141.506989]  [<ffffffff81045697>] warn_slowpath_fmt+0x47/0x50
[211141.506990]  [<ffffffff811ba315>] remove_proc_entry+0x125/0x180
[211141.506991]  [<ffffffff81233e3d>] nfs_fs_proc_net_exit+0x5d/0x70
[211141.506992]  [<ffffffff812392fd>] nfs_net_exit+0xd/0x20
[211141.506993]  [<ffffffff8161dda9>] ops_exit_list.isra.3+0x39/0x60
[211141.506994]  [<ffffffff8161e600>] cleanup_net+0x100/0x1b0
[211141.506996]  [<ffffffff8105f7cd>] process_one_work+0x16d/0x450
[211141.506997]  [<ffffffff8106045d>] worker_thread+0x12d/0x3d0
[211141.506998]  [<ffffffff81060330>] ? manage_workers.isra.25+0x2c0/0x2c0
[211141.507000]  [<ffffffff810662a6>] kthread+0xd6/0xf0
[211141.507001]  [<ffffffff810661d0>] ? kthread_create_on_node+0x180/0x180
[211141.507002]  [<ffffffff817da6bc>] ret_from_fork+0x7c/0xb0
[211141.507003]  [<ffffffff810661d0>] ? kthread_create_on_node+0x180/0x180
[211141.507004] ---[ end trace f415ec98bcbf9058 ]---
[265425.656507] ------------[ cut here ]------------


As mentioned in the bug report, it is due to
79605e758aab5d9deba094acaa3a91d74787562f. I reverted this commit and
found that the warning disappears.

Please revert.

Thanks!
-- 
Pranith