lib/Makefile: make union-find compilation conditional on CONFIG_CPUSETS

Currently, cpuset is the only user of the union-find implementation. 
Compiling union-find in all configurations unnecessarily increases the
code size when building the kernel without cgroup support.  Modify the
build system to compile union-find only when CONFIG_CPUSETS is enabled.

Link: https://lore.kernel.org/lkml/[email protected]/
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Kuan-Wei Chiu <[email protected]>
Suggested-by: Waiman Long <[email protected]>
Acked-by: Waiman Long <[email protected]>
Acked-by: Tejun Heo <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Cc: Ching-Chun (Jim) Huang <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Michal Koutný <[email protected]>
Cc: Xavier <[email protected]>
Cc: Zefan Li <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

0 files changed, 0 insertions, 0 deletions