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rcu-tasks: Convert RCU_LOCKDEP_WARN() to WARN_ONCE()
[ Upstream commit fcd53c8a4d
]
Kernels built with CONFIG_PROVE_RCU=y and CONFIG_DEBUG_LOCK_ALLOC=y
attempt to emit a warning when the synchronize_rcu_tasks_generic()
function is called during early boot while the rcu_scheduler_active
variable is RCU_SCHEDULER_INACTIVE. However the warnings is not
actually be printed because the debug_lockdep_rcu_enabled() returns
false, exactly because the rcu_scheduler_active variable is still equal
to RCU_SCHEDULER_INACTIVE.
This commit therefore replaces RCU_LOCKDEP_WARN() with WARN_ONCE()
to force these warnings to actually be printed.
Signed-off-by: Zqiang <qiang1.zhang@intel.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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1 changed files with 1 additions and 1 deletions
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@ -560,7 +560,7 @@ static int __noreturn rcu_tasks_kthread(void *arg)
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static void synchronize_rcu_tasks_generic(struct rcu_tasks *rtp)
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{
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/* Complain if the scheduler has not started. */
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RCU_LOCKDEP_WARN(rcu_scheduler_active == RCU_SCHEDULER_INACTIVE,
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WARN_ONCE(rcu_scheduler_active == RCU_SCHEDULER_INACTIVE,
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"synchronize_rcu_tasks called too soon");
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// If the grace-period kthread is running, use it.
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