cregit-Linux how code gets into the kernel

Release 4.12 include/linux/rcutiny.h

Directory: include/linux
/*
 * Read-Copy Update mechanism for mutual exclusion, the Bloatwatch edition.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, you can access it online at
 * http://www.gnu.org/licenses/gpl-2.0.html.
 *
 * Copyright IBM Corporation, 2008
 *
 * Author: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
 *
 * For detailed explanation of Read-Copy Update mechanism see -
 *              Documentation/RCU
 */
#ifndef __LINUX_TINY_H

#define __LINUX_TINY_H

#include <linux/cache.h>

struct rcu_dynticks;

static inline int rcu_dynticks_snap(struct rcu_dynticks *rdtp) { return 0; }

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Paul E. McKenney15100.00%1100.00%
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static inline bool rcu_eqs_special_set(int cpu) { return false; /* Never flag non-existent other CPUs! */ }

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Paul E. McKenney14100.00%1100.00%
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static inline unsigned long get_state_synchronize_rcu(void) { return 0; }

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Paul E. McKenney13100.00%1100.00%
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static inline void cond_synchronize_rcu(unsigned long oldstate) { might_sleep(); }

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Paul E. McKenney14100.00%1100.00%
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static inline unsigned long get_state_synchronize_sched(void) { return 0; }

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Paul E. McKenney13100.00%1100.00%
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static inline void cond_synchronize_sched(unsigned long oldstate) { might_sleep(); }

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Paul E. McKenney14100.00%1100.00%
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extern void rcu_barrier_bh(void); extern void rcu_barrier_sched(void);
static inline void synchronize_rcu_expedited(void) { synchronize_sched(); /* Only one CPU, so pretty fast anyway!!! */ }

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Paul E. McKenney13100.00%2100.00%
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static inline void rcu_barrier(void) { rcu_barrier_sched(); /* Only one CPU, so only one list of callbacks! */ }

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static inline void synchronize_rcu_bh(void) { synchronize_sched(); }

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static inline void synchronize_rcu_bh_expedited(void) { synchronize_sched(); }

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static inline void synchronize_sched_expedited(void) { synchronize_sched(); }

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Lai Jiangshan12100.00%1100.00%
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static inline void kfree_call_rcu(struct rcu_head *head, rcu_callback_t func) { call_rcu(head, func); }

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Paul E. McKenney2195.45%150.00%
Boqun Feng14.55%150.00%
Total22100.00%2100.00%

#define rcu_note_context_switch(preempt) \ do { \ rcu_sched_qs(); \ rcu_note_voluntary_context_switch_lite(current); \ } while (0) /* * Take advantage of the fact that there is only one CPU, which * allows us to ignore virtualization-based context switches. */
static inline void rcu_virt_note_context_switch(int cpu) { }

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Gleb Natapov9100.00%1100.00%
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/* * Return the number of grace periods started. */
static inline unsigned long rcu_batches_started(void) { return 0; }

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Paul E. McKenney13100.00%1100.00%
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/* * Return the number of bottom-half grace periods started. */
static inline unsigned long rcu_batches_started_bh(void) { return 0; }

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Paul E. McKenney13100.00%1100.00%
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/* * Return the number of sched grace periods started. */
static inline unsigned long rcu_batches_started_sched(void) { return 0; }

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Paul E. McKenney13100.00%1100.00%
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/* * Return the number of grace periods completed. */
static inline unsigned long rcu_batches_completed(void) { return 0; }

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Paul E. McKenney13100.00%2100.00%
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/* * Return the number of bottom-half grace periods completed. */
static inline unsigned long rcu_batches_completed_bh(void) { return 0; }

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Paul E. McKenney13100.00%2100.00%
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/* * Return the number of sched grace periods completed. */
static inline unsigned long rcu_batches_completed_sched(void) { return 0; }

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Paul E. McKenney13100.00%2100.00%
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/* * Return the number of expedited grace periods completed. */
static inline unsigned long rcu_exp_batches_completed(void) { return 0; }

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/* * Return the number of expedited sched grace periods completed. */
static inline unsigned long rcu_exp_batches_completed_sched(void) { return 0; }

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Paul E. McKenney13100.00%1100.00%
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static inline void rcu_force_quiescent_state(void) { }

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Paul E. McKenney8100.00%1100.00%
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static inline void rcu_bh_force_quiescent_state(void) { }

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Paul E. McKenney8100.00%1100.00%
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static inline void rcu_sched_force_quiescent_state(void) { }

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Paul E. McKenney8100.00%1100.00%
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static inline void show_rcu_gp_kthreads(void) { }

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Paul E. McKenney8100.00%1100.00%
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static inline void rcu_cpu_stall_reset(void) { }

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Paul E. McKenney8100.00%1100.00%
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static inline void rcu_idle_enter(void) { }

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Paul E. McKenney8100.00%1100.00%
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static inline void rcu_idle_exit(void) { }

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Paul E. McKenney8100.00%1100.00%
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static inline void rcu_irq_enter(void) { }

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Paul E. McKenney8100.00%1100.00%
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static inline void rcu_irq_exit_irqson(void) { }

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Paul E. McKenney8100.00%1100.00%
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static inline void rcu_irq_enter_irqson(void) { }

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Paul E. McKenney8100.00%1100.00%
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static inline void rcu_irq_exit(void) { }

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Paul E. McKenney8100.00%1100.00%
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static inline void exit_rcu(void) { }

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Paul E. McKenney8100.00%1100.00%
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#if defined(CONFIG_DEBUG_LOCK_ALLOC) || defined(CONFIG_SRCU) extern int rcu_scheduler_active __read_mostly; void rcu_scheduler_starting(void); #else /* #if defined(CONFIG_DEBUG_LOCK_ALLOC) || defined(CONFIG_SRCU) */
static inline void rcu_scheduler_starting(void) { }

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#endif /* #else #if defined(CONFIG_DEBUG_LOCK_ALLOC) || defined(CONFIG_SRCU) */ #if defined(CONFIG_DEBUG_LOCK_ALLOC) || defined(CONFIG_RCU_TRACE)
static inline bool rcu_is_watching(void) { return __rcu_is_watching(); }

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#else /* defined(CONFIG_DEBUG_LOCK_ALLOC) || defined(CONFIG_RCU_TRACE) */
static inline bool rcu_is_watching(void) { return true; }

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#endif /* #else defined(CONFIG_DEBUG_LOCK_ALLOC) || defined(CONFIG_RCU_TRACE) */
static inline void rcu_request_urgent_qs_task(struct task_struct *t) { }

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Paul E. McKenney11100.00%1100.00%
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static inline void rcu_all_qs(void) { barrier(); /* Avoid RCU read-side critical sections leaking across. */ }

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Paul E. McKenney753.85%150.00%
Boqun Feng646.15%150.00%
Total13100.00%2100.00%

/* RCUtree hotplug events */ #define rcutree_prepare_cpu NULL #define rcutree_online_cpu NULL #define rcutree_offline_cpu NULL #define rcutree_dead_cpu NULL #define rcutree_dying_cpu NULL #endif /* __LINUX_RCUTINY_H */

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Paul E. McKenney49290.11%2681.25%
Thomas Gleixner213.85%13.12%
Lai Jiangshan122.20%13.12%
Gleb Natapov101.83%13.12%
Boqun Feng71.28%26.25%
Ingo Molnar40.73%13.12%
Total546100.00%32100.00%
Directory: include/linux
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