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rcu: Make PREEMPT_RCU be a modifier to TREE_RCU

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Currently PREEMPT_RCU and TREE_RCU are mutually exclusive Kconfig
options.  But PREEMPT_RCU actually specifies a kind of TREE_RCU,
namely a preemptible TREE_RCU. This commit therefore makes PREEMPT_RCU
be a modifer to the TREE_RCU Kconfig option.  This has the benefit of
simplifying several of the #if expressions that formerly needed to
check both, but now need only check one or the other.

Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com>
Signed-off-by: Lai Jiangshan <jiangshanlai@gmail.com>
Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Lai Jiangshan 2019-10-15 02:55:57 +00:00 • committed by Paul E. McKenney
parent 03bd2983d7
commit b3e627d3d5
7 changed files with 14 additions and 14 deletions
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4
include/trace/events/rcu.h
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@ -41,7 +41,7 @@ TRACE_EVENT(rcu_utilization,
TP_printk("%s", __entry->s)
);
#if defined(CONFIG_TREE_RCU) || defined(CONFIG_PREEMPT_RCU)
#if defined(CONFIG_TREE_RCU)
/*
* Tracepoint for grace-period events. Takes a string identifying the
@ -432,7 +432,7 @@ TRACE_EVENT_RCU(rcu_fqs,
__entry->cpu, __entry->qsevent)
);
#endif /* #if defined(CONFIG_TREE_RCU) || defined(CONFIG_PREEMPT_RCU) */
#endif /* #if defined(CONFIG_TREE_RCU) */
/*
* Tracepoint for dyntick-idle entry/exit events. These take a string