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rcu-tasks: Move RCU-tasks initialization to before early_initcall()

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PowerPC testing encountered boot failures due to RCU Tasks not being
fully initialized until core_initcall() time.  This commit therefore
initializes RCU Tasks (along with Rude RCU and RCU Tasks Trace) just
before early_initcall() time, thus allowing waiting on RCU Tasks grace
periods from early_initcall() handlers.

Link: https://lore.kernel.org/rcu/87eekfh80a.fsf@dja-thinkpad.axtens.net/
Fixes: 36dadef23f ("kprobes: Init kprobes in early_initcall")
Tested-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Uladzislau Rezki (Sony)
2020-12-09 21:27:31 +01:00
committed by Paul E. McKenney
parent 0477e92881
commit 1b04fa9900
3 changed files with 28 additions and 4 deletions
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init/main.c
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@@ -1512,6 +1512,7 @@ static noinline void __init kernel_init_freeable(void)
init_mm_internals();
rcu_init_tasks_generic();
do_pre_smp_initcalls();
lockup_detector_init();