linux/kernel/power
Lukasz Luba fb9d62b27a PM: EM: postpone creating the debugfs dir till fs_initcall
The debugfs directory '/sys/kernel/debug/energy_model' is needed before
the Energy Model registration can happen. With the recent change in
debugfs subsystem it's not allowed to create this directory at early
stage (core_initcall). Thus creating this directory would fail.

Postpone the creation of the EM debug dir to later stage: fs_initcall.

It should be safe since all clients: CPUFreq drivers, Devfreq drivers
will be initialized in later stages.

The custom debug log below prints the time of creation the EM debug dir
at fs_initcall and successful registration of EMs at later stages.

[    1.505717] energy_model: creating rootdir
[    3.698307] cpu cpu0: EM: created perf domain
[    3.709022] cpu cpu1: EM: created perf domain

Fixes: 56348560d4 ("debugfs: do not attempt to create a new file before the filesystem is initalized")
Reported-by: Ionela Voinescu <ionela.voinescu@arm.com>
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2021-03-23 19:53:48 +01:00
..
autosleep.c PM / wakeup: Show wakeup sources stats in sysfs 2019-08-21 00:20:40 +02:00
console.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
energy_model.c PM: EM: postpone creating the debugfs dir till fs_initcall 2021-03-23 19:53:48 +01:00
hibernate.c kernel/power: allow hibernation with page_poison sanity checking 2020-12-15 12:13:46 -08:00
Kconfig PM: Kconfig: remove unneeded "default n" options 2021-02-12 16:43:23 +01:00
main.c PM: sleep: Constify static struct attribute_group 2021-02-12 16:46:59 +01:00
Makefile PM: hibernate: Split off snapshot dev option 2020-05-19 17:48:08 +02:00
power.h kernel/power: allow hibernation with page_poison sanity checking 2020-12-15 12:13:46 -08:00
poweroff.c kernel/power: constify sysrq_key_op 2020-05-15 14:53:20 +02:00
process.c PM: sleep: No need to check PF_WQ_WORKER in thaw_kernel_threads() 2021-01-27 19:20:17 +01:00
qos.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
snapshot.c kernel/power: allow hibernation with page_poison sanity checking 2020-12-15 12:13:46 -08:00
suspend_test.c PM: sleep: Switch to rtc_time64_to_tm()/rtc_tm_to_time64() 2019-12-20 09:58:08 +01:00
suspend.c PM / suspend: fix kernel-doc markup 2020-11-23 18:24:53 +01:00
swap.c PM: hibernate: flush swap writer after marking 2021-01-25 18:52:30 +01:00
user.c block-5.10-2020-10-12 2020-10-13 12:12:44 -07:00
wakelock.c PM / wakeup: Show wakeup sources stats in sysfs 2019-08-21 00:20:40 +02:00