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Implement idr_is_empty() in the LinuxKPI and make idr_remove() API compatible

Description

Implement idr_is_empty() in the LinuxKPI and make idr_remove() API compatible
with upstream Linux by returning the pointer to the removed element.

Submitted by: Johannes Lundberg <johalun0@gmail.com>
MFC after: 1 week
Sponsored by: Mellanox Technologies

Details

Provenance
hselaskyAuthored on
Parents
rS334422: Correct argument for evdev_push_rel().
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