Merge from stable-2.6.32.53
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Merge commit 'v2.6.32.53' into xen/next-2.6.32

* commit 'v2.6.32.53':
  Linux 2.6.32.53
  ath9k: Fix kernel panic in AR2427 in AP mode
  hung_task: fix false positive during vfork
  watchdog: hpwdt: Changes to handle NX secure bit in 32bit path
  ARM: 7220/1: mmc: mmci: Fixup error handling for dma
  ARM:imx:fix pwm period value
  vfs: __read_cache_page should use gfp argument rather than GFP_KERNEL
  MXC PWM: should active during DOZE/WAIT/DBG mode
  SCSI: mpt2sas: _scsih_smart_predicted_fault uses GFP_KERNEL in interrupt context
  cfq-iosched: fix cfq_cic_link() race confition