Patch1 fix a bug caused by overflow.
Patch2,3 add checks for unallocated_id.
Patch4 changes to returned error code
Patch5-8 cleanup.

Lai Jiangshan (8):
  idr: fix overflow bug for the max-high layer
  idr: fix unexpected id-removal when idr_remove(unallocated_id)
  idr: fix NULL pointer dereference when ida_remove(unallocated_id)
  idr: fix idr_replace()'s returned error code
  idr: covert BUG_ON() to WARN_ON_ONCE() if the argument is invalid.
  idr: avoid ping-pong
  idr: don't need to shink the free list when idr_remove()
  idr: reduce the unneeded check in free_layer()

 lib/idr.c |   58 +++++++++++++++++-----------------------------------------
 1 files changed, 17 insertions(+), 41 deletions(-)

-- 
1.7.4.4