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https://github.com/edk2-porting/linux-next.git
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6d48152eaf
Tiny RCU's job is to be tiny, so this commit removes its RCU CPU stall warning code. After this, there is no longer any need for rcu_sched_ctrlblk and rcu_bh_ctrlblk to be in tiny_plugin.h, so this commit also moves them to tiny.c. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
48 lines
1.8 KiB
C
48 lines
1.8 KiB
C
/*
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* Read-Copy Update mechanism for mutual exclusion, the Bloatwatch edition
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* Internal non-public definitions that provide either classic
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* or preemptible semantics.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, you can access it online at
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* http://www.gnu.org/licenses/gpl-2.0.html.
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*
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* Copyright (c) 2010 Linaro
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*
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* Author: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
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*/
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#if defined(CONFIG_DEBUG_LOCK_ALLOC) || defined(CONFIG_SRCU)
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#include <linux/kernel_stat.h>
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int rcu_scheduler_active __read_mostly;
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EXPORT_SYMBOL_GPL(rcu_scheduler_active);
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/*
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* During boot, we forgive RCU lockdep issues. After this function is
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* invoked, we start taking RCU lockdep issues seriously. Note that unlike
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* Tree RCU, Tiny RCU transitions directly from RCU_SCHEDULER_INACTIVE
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* to RCU_SCHEDULER_RUNNING, skipping the RCU_SCHEDULER_INIT stage.
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* The reason for this is that Tiny RCU does not need kthreads, so does
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* not have to care about the fact that the scheduler is half-initialized
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* at a certain phase of the boot process. Unless SRCU is in the mix.
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*/
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void __init rcu_scheduler_starting(void)
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{
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WARN_ON(nr_context_switches() > 0);
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rcu_scheduler_active = IS_ENABLED(CONFIG_SRCU)
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? RCU_SCHEDULER_INIT : RCU_SCHEDULER_RUNNING;
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}
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#endif /* #if defined(CONFIG_DEBUG_LOCK_ALLOC) || defined(CONFIG_SRCU) */
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