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context_tracking: Take NMI eqs entrypoints over RCU

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The RCU dynticks counter is going to be merged into the context tracking
subsystem. Prepare with moving the NMI extended quiescent states
entrypoints to context tracking. For now those are dumb redirection to
existing RCU calls.

Acked-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Neeraj Upadhyay <quic_neeraju@quicinc.com>
Cc: Uladzislau Rezki <uladzislau.rezki@sony.com>
Cc: Joel Fernandes <joel@joelfernandes.org>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Nicolas Saenz Julienne <nsaenz@kernel.org>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Xiongfeng Wang <wangxiongfeng2@huawei.com>
Cc: Yu Liao <liaoyu15@huawei.com>
Cc: Phil Auld <pauld@redhat.com>
Cc: Paul Gortmaker<paul.gortmaker@windriver.com>
Cc: Alex Belits <abelits@marvell.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Reviewed-by: Nicolas Saenz Julienne <nsaenzju@redhat.com>
Tested-by: Nicolas Saenz Julienne <nsaenzju@redhat.com>
This commit is contained in:
Frederic Weisbecker
2022-06-08 16:40:27 +02:00
committed by Paul E. McKenney
parent 6f0e6c1598
commit 493c182282
9 changed files with 27 additions and 13 deletions
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Documentation/RCU/Design/Requirements/Requirements.rst
+1 -1
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@@ -1847,7 +1847,7 @@ normal interrupts. One way that this can happen is for code that
directly invokes ct_irq_enter() and ct_irq_exit() to be called
from an NMI handler. This astonishing fact of life prompted the current
code structure, which has ct_irq_enter() invoking
rcu_nmi_enter() and ct_irq_exit() invoking rcu_nmi_exit().
ct_nmi_enter() and ct_irq_exit() invoking ct_nmi_exit().
And yes, I also learned of this requirement the hard way.
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