The patch titled
Subject: lib/Makefile: make union-find compilation conditional on CONFIG_CPUSETS
has been added to the -mm mm-nonmm-unstable branch. Its filename is
lib-makefile-make-union-find-compilation-conditional-on-config_cpusets.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/lib-makefile-make-union-find-compilation-conditional-on-config_cpusets.patch
This patch will later appear in the mm-nonmm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Kuan-Wei Chiu <visitorckw@xxxxxxxxx>
Subject: lib/Makefile: make union-find compilation conditional on CONFIG_CPUSETS
Date: Fri, 11 Oct 2024 22:12:14 +0800
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@xxxxxxxxxx/
Link: https://lkml.kernel.org/r/20241011141214.87096-1-visitorckw@xxxxxxxxx
Signed-off-by: Kuan-Wei Chiu <visitorckw@xxxxxxxxx>
Suggested-by: Waiman Long <llong@xxxxxxxxxx>
Acked-by: Waiman Long <longman@xxxxxxxxxx>
Acked-by: Tejun Heo <tj@xxxxxxxxxx>
Cc: Ching-Chun (Jim) Huang <jserv@xxxxxxxxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Michal Koutný <mkoutny@xxxxxxxx>
Cc: Xavier <xavier_qy@xxxxxxx>
Cc: Zefan Li <lizefan.x@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
init/Kconfig | 1 +
lib/Kconfig | 3 +++
lib/Makefile | 3 ++-
3 files changed, 6 insertions(+), 1 deletion(-)
--- a/init/Kconfig~lib-makefile-make-union-find-compilation-conditional-on-config_cpusets
+++ a/init/Kconfig
@@ -1153,6 +1153,7 @@ 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
--- a/lib/Kconfig~lib-makefile-make-union-find-compilation-conditional-on-config_cpusets
+++ a/lib/Kconfig
@@ -777,3 +777,6 @@ config POLYNOMIAL
config FIRMWARE_TABLE
bool
+
+config UNION_FIND
+ bool
--- a/lib/Makefile~lib-makefile-make-union-find-compilation-conditional-on-config_cpusets
+++ a/lib/Makefile
@@ -35,8 +35,9 @@ lib-y := ctype.o string.o vsprintf.o cmd
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
_
Patches currently in -mm which might be from visitorckw@xxxxxxxxx are
lib-kconfigdebug-move-int_pow-test-option-to-runtime-testing-section.patch
lib-makefile-make-union-find-compilation-conditional-on-config_cpusets.patch
