linux/kernel/sched
Valentin Schneider a8b76910e4 preempt: Restore preemption model selection configs
Commit c597bfddc9 ("sched: Provide Kconfig support for default dynamic
preempt mode") changed the selectable config names for the preemption
model. This means a config file must now select

  CONFIG_PREEMPT_BEHAVIOUR=y

rather than

  CONFIG_PREEMPT=y

to get a preemptible kernel. This means all arch config files would need to
be updated - right now they'll all end up with the default
CONFIG_PREEMPT_NONE_BEHAVIOUR.

Rather than touch a good hundred of config files, restore usage of
CONFIG_PREEMPT{_NONE, _VOLUNTARY}. Make them configure:
o The build-time preemption model when !PREEMPT_DYNAMIC
o The default boot-time preemption model when PREEMPT_DYNAMIC

Add siblings of those configs with the _BUILD suffix to unconditionally
designate the build-time preemption model (PREEMPT_DYNAMIC is built with
the "highest" preemption model it supports, aka PREEMPT). Downstream
configs should by now all be depending / selected by CONFIG_PREEMPTION
rather than CONFIG_PREEMPT, so only a few sites need patching up.

Signed-off-by: Valentin Schneider <valentin.schneider@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Marco Elver <elver@google.com>
Link: https://lore.kernel.org/r/20211110202448.4054153-2-valentin.schneider@arm.com
2021-11-11 13:09:33 +01:00
..
Makefile
autogroup.c sched/fair: Prevent dead task groups from regaining cfs_rq's 2021-11-11 13:09:33 +01:00
autogroup.h
clock.c
completion.c
core.c preempt: Restore preemption model selection configs 2021-11-11 13:09:33 +01:00
core_sched.c kernel.sys.v5.16 2021-11-10 16:10:47 -08:00
cpuacct.c
cpudeadline.c
cpudeadline.h
cpufreq.c
cpufreq_schedutil.c
cpupri.c
cpupri.h
cputime.c
deadline.c
debug.c
fair.c sched/fair: Prevent dead task groups from regaining cfs_rq's 2021-11-11 13:09:33 +01:00
features.h
idle.c
isolation.c
loadavg.c
membarrier.c
pelt.c
pelt.h
psi.c
rt.c sched/fair: Prevent dead task groups from regaining cfs_rq's 2021-11-11 13:09:33 +01:00
sched-pelt.h
sched.h sched/fair: Prevent dead task groups from regaining cfs_rq's 2021-11-11 13:09:33 +01:00
smp.h
stats.c
stats.h
stop_task.c
swait.c
topology.c Merge branch 'akpm' (patches from Andrew) 2021-11-06 14:08:17 -07:00
wait.c
wait_bit.c