block/cfq: fix build error
block/cfq: check st->total_weight to prevent kernel panic caused by dividing by zero

Signed-off-by: Shilin Victor <chrono.monochrome@gmail.com>
net: wireless: bcmdhd: reduce wakelock time of RX packet

Reduce it by half to reduce wlan_rx_wake wakelock

Change-Id: I5ff03cf2d973a079911b12ecc0bede7f45fe1df2
Signed-off-by: Zhao Wei Liew <zhaoweiliew@gmail.com>
fs: update from LK 3.1

Signed-off-by: Shilin Victor <chrono.monochrome@gmail.com>
VFS && FS: update [part 1]

new helper: iterate_supers_type()
...
make d_splice_alias(ERR_PTR(err), dentry) = ERR_PTR(err)

https://lkml.org/lkml/2011/7/22/353