Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6

Merge branch 'for-linus' of git://git390.marist.edu/linux-2.6

* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6:
  [S390] mm: add ZONE_DMA to 31-bit config again
  [S390] mm: add page fault retry handling
  [S390] mm: handle kernel caused page fault oom situations
  [S390] delay: implement ndelay
  [S390] topology,sched: fix cpu_coregroup_mask/cpu_book_mask definitions
  [S390] hwsampler: allow cpu hotplug
  [S390] uaccess: turn __access_ok() into a define
  [S390] irq: merge irq.c and s390_ext.c
  [S390] irq: fix service signal external interrupt handling
  [S390] pfault: always enable service signal interrupt