Commit bf9850f6 authored by Kuan-Wei Chiu's avatar Kuan-Wei Chiu Committed by Andrew Morton
Browse files

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/1ccd6411-5002-4574-bb8e-3e64bba6a757@redhat.com/
Link: https://lkml.kernel.org/r/20241011141214.87096-1-visitorckw@gmail.com


Signed-off-by: default avatarKuan-Wei Chiu <visitorckw@gmail.com>
Suggested-by: default avatarWaiman Long <llong@redhat.com>
Acked-by: default avatarWaiman Long <longman@redhat.com>
Acked-by: default avatarTejun Heo <tj@kernel.org>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Cc: Ching-Chun (Jim) Huang <jserv@ccns.ncku.edu.tw>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Koutný <mkoutny@suse.com>
Cc: Xavier <xavier_qy@163.com>
Cc: Zefan Li <lizefan.x@bytedance.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 8801c35c

init/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -1157,6 +1157,7 @@ config CGROUP_HUGETLB 
config CPUSETS

	bool "Cpuset controller"

	depends on SMP

	select UNION_FIND

	help

	  This option will let you create and manage CPUSETs which

	  allow dynamically partitioning a system into sets of CPUs and

lib/Kconfig

+3 −0
Original line number Diff line number Diff line
@@ -777,3 +777,6 @@ config POLYNOMIAL 


config FIRMWARE_TABLE

	bool



config UNION_FIND

	bool

lib/Makefile

+2 −1
Original line number Diff line number Diff line
@@ -35,8 +35,9 @@ lib-y := ctype.o string.o vsprintf.o cmdline.o \ 
	 is_single_threaded.o plist.o decompress.o kobject_uevent.o \

	 earlycpio.o seq_buf.o siphash.o dec_and_lock.o \

	 nmi_backtrace.o win_minmax.o memcat_p.o \

	 buildid.o objpool.o union_find.o

	 buildid.o objpool.o



lib-$(CONFIG_UNION_FIND) += union_find.o

lib-$(CONFIG_PRINTK) += dump_stack.o

lib-$(CONFIG_SMP) += cpumask.o