FYI, we noticed the below changes on

git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
commit 66ba93c0d7fe63def447ad0afe380307ff9ebcad ("fanotify: don't set FAN_ONDIR implicitly on a marks ignored mask")

When doing LTP test.  Test system hang after doing some fanotify test cases, while system
can run to reboot in the parent comments.

<<<test_start>>>
tag=fanotify01 stime=1429706735
cmdline="fanotify01"
contacts=""
analysis=exit
<<<test_output>>>
fanotify01    1  TPASS  :  get event: mask=31 pid=11237 fd=8
fanotify01    2  TPASS  :  get event: mask=11 pid=11237 fd=4294967294
fanotify01    3  TPASS  :  get event: mask=10 pid=11237 fd=4294967294
fanotify01    4  TPASS  :  get event: mask=2a pid=11237 fd=9
fanotify01    5  TPASS  :  get event: mask=a pid=11237 fd=4294967294
fanotify01    6  TPASS  :  get event: mask=8 pid=11237 fd=4294967294
fanotify01    7  TPASS  :  get event: mask=20 pid=11237 fd=11
fanotify01    8  TPASS  :  get event: mask=b pid=11237 fd=10
fanotify01    9  TPASS  :  get event: mask=9 pid=11237 fd=4294967294
fanotify01   10  TPASS  :  get event: mask=8 pid=11237 fd=4294967294
fanotify01   11  TPASS  :  get event: mask=2 pid=11237 fd=13
fanotify01   12  TPASS  :  get event: mask=8 pid=11237 fd=12
<<<execution_status>>>
initiation_status="ok"
duration=0 termination_type=exited termination_id=0 corefile=no
cutime=0 cstime=0
<<<test_end>>>
<<<test_start>>>
tag=fanotify02 stime=1429706735
cmdline="fanotify02"
contacts=""
analysis=exit
<<<test_output>>>
[ 4283.197601] i6300esb: Unexpected close, not stopping watchdog!
[ 4283.200494] systemd-journald[117]: Received SIGTERM from PID 624 (watchdog).
[ 4283.201894] systemd-journald[117]: systemd-journald stopped as pid 117


Thanks,
Ying Huang