change-log:
- update comment for pfm_do_fasync()
- fix return value for pfm_smpl_buffer_alloc(). Now
  return ENOMEM instead of EAGAIN when buffer too big
  for RLIMIT_MEMLOCK.
- added missing vm_pgoff initialization in pfm_smpl_buffer_alloc()
- added flags tro debug print in pfm_write_pmcs
- added seed and mask to debug print in pfm_write_pmds
- shorten some of the debug prints
- remove bogus sanity check from pfm_save_regs() in SMP.
  this could cause invalid PMU state restore

signed-off-by: eranian@hpl.hp.com
Signed-off-by: Tony Luck <tony.luck@intel.com>