staging: logger: hold mutex while removing reader

The readers list is traversed under the log->mutex lock
(for example from fix_up_readers()), but the deletion of
elements from this list is not being done under this lock.

Cc: Brian Swetland <swetland@google.com>
Cc: Dima Zavin <dima@android.com>
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
cpufreq: interactive: sync android-3.0 with android-3.4

Change-Id: I71443db4edbe43a08fe58a54a742b4c788ef11e3
Signed-off-by: Todd Poynor <toddpoynor@google.com>
ancora: Update defconfig
Merge remote-tracking branch 'arco-samsung-kernel-msm7x30/jb-3.0' into jb-3.0
Merge remote-tracking branch 'arco/jb-3.0' into jb-3.0
Merge remote-tracking branch 'castagnait/jb-3.0' into jb-3.0
Squashed update of kernel from 3.0.58 to 3.0.59
Initial support for ancora_tmo (SGH-T679)
ancora_tmo: Fix vibrator

Not 100% sure since I can't test it personally.
ancora_tmo: Fix display regulators
ancora_tmo: Use gpio config code from stock kernel
ancora_tmo: Update board file for jb_chocolate
ancora_tmo: Update defconfig
Merge remote-tracking branch 'arco/jb-3.0' into jb-3.0