tree 268bbe9049d9370d5b644dfde51fc4a8942bae3b
parent 050a6b47d98e2bcea909c1129111e721668aaa2c
author Tejun Heo <tj@kernel.org> 1362013507 -0800
committer Linus Torvalds <torvalds@linux-foundation.org> 1362021020 -0800

idr: add idr_layer->prefix

Add a field which carries the prefix of ID the idr_layer covers.  This
will be used to implement lookup hint.

This patch doesn't make use of the new field and doesn't introduce any
behavior difference.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>