Qais Yousef e3b8b6a0d1 sched/core: Fix compilation error when cgroup not selected
When cgroup is disabled the following compilation error was hit

	kernel/sched/core.c: In function ‘uclamp_update_active_tasks’:
	kernel/sched/core.c:1081:23: error: storage size of ‘it’ isn’t known
	  struct css_task_iter it;
			       ^~
	kernel/sched/core.c:1084:2: error: implicit declaration of function ‘css_task_iter_start’; did you mean ‘__sg_page_iter_start’? [-Werror=implicit-function-declaration]
	  css_task_iter_start(css, 0, &it);
	  ^~~~~~~~~~~~~~~~~~~
	  __sg_page_iter_start
	kernel/sched/core.c:1085:14: error: implicit declaration of function ‘css_task_iter_next’; did you mean ‘__sg_page_iter_next’? [-Werror=implicit-function-declaration]
	  while ((p = css_task_iter_next(&it))) {
		      ^~~~~~~~~~~~~~~~~~
		      __sg_page_iter_next
	kernel/sched/core.c:1091:2: error: implicit declaration of function ‘css_task_iter_end’; did you mean ‘get_task_cred’? [-Werror=implicit-function-declaration]
	  css_task_iter_end(&it);
	  ^~~~~~~~~~~~~~~~~
	  get_task_cred
	kernel/sched/core.c:1081:23: warning: unused variable ‘it’ [-Wunused-variable]
	  struct css_task_iter it;
			       ^~
	cc1: some warnings being treated as errors
	make[2]: *** [kernel/sched/core.o] Error 1

Fix by protetion uclamp_update_active_tasks() with
CONFIG_UCLAMP_TASK_GROUP

Fixes: babbe170e053 ("sched/uclamp: Update CPU's refcount on TG's clamp changes")
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Qais Yousef <qais.yousef@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Vincent Guittot <vincent.guittot@linaro.org>
Cc: Patrick Bellasi <patrick.bellasi@matbug.net>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Dietmar Eggemann <dietmar.eggemann@arm.com>
Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Ben Segall <bsegall@google.com>
Link: https://lkml.kernel.org/r/20191105112212.596-1-qais.yousef@arm.com
2019-11-08 22:34:14 +01:00
..
2019-09-15 21:37:13 +02:00
2019-09-17 19:15:14 -07:00
2019-10-21 02:05:21 +02:00
2019-07-08 18:55:42 -07:00
2019-07-08 18:55:42 -07:00
2019-07-08 18:55:42 -07:00
2019-05-28 17:46:43 -04:00
2019-07-25 08:36:29 -07:00
2019-05-24 20:16:01 +02:00
2019-09-20 11:19:48 -07:00
2019-09-16 09:28:19 -07:00
2019-07-08 19:36:47 -07:00
2019-07-08 19:36:47 -07:00