Paul E. McKenney 728f23e53c rcu: Invoke rcu_spawn_core_kthreads() from rcu_spawn_gp_kthread() ... [ Upstream commit 8e4b1d2bc198e34b48fc7cc3a3c5a2fcb269e271 ] Currently, rcu_spawn_core_kthreads() is invoked via an early_initcall(), which works, except that rcu_spawn_gp_kthread() is also invoked via an early_initcall() and rcu_spawn_core_kthreads() relies on adjustments to kthread_prio that are carried out by rcu_spawn_gp_kthread(). There is no guaranttee of ordering among early_initcall() handlers, and thus no guarantee that kthread_prio will be properly checked and range-limited at the time that rcu_spawn_core_kthreads() needs it. In most cases, this bug is harmless. After all, the only reason that rcu_spawn_gp_kthread() adjusts the value of kthread_prio is if the user specified a nonsensical value for this boot parameter, which experience indicates is rare. Nevertheless, a bug is a bug. This commit therefore causes the rcu_spawn_core_kthreads() function to be invoked directly from rcu_spawn_gp_kthread() after any needed adjustments to kthread_prio have been carried out. Fixes: 48d07c04b4 ("rcu: Enable elimination of Tree-RCU softirq processing") Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2021-07-14 16:56:33 +02:00
..
Kconfig
Kconfig.debug
Makefile
rcu_segcblist.c
rcu_segcblist.h
rcu.h
rcuscale.c
rcutorture.c
refscale.c
srcutiny.c
srcutree.c
sync.c
tasks.h
tiny.c
tree_exp.h
tree_plugin.h
tree_stall.h
tree.c	rcu: Invoke rcu_spawn_core_kthreads() from rcu_spawn_gp_kthread()	2021-07-14 16:56:33 +02:00
tree.h
update.c