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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899/* SPDX-License-Identifier: GPL-2.0 */#ifndef _LINUX_FUTEX_TYPES_H#define _LINUX_FUTEX_TYPES_H
#ifdef CONFIG_FUTEX#include <linux/compiler_types.h>#include <linux/mutex_types.h>#include <linux/types.h>
struct compat_robust_list_head;struct futex_pi_state;struct robust_list_head;
/** * struct futex_sched_data - Futex related per task data * @robust_list: User space registered robust list pointer * @compat_robust_list: User space registered robust list pointer for compat tasks * @pi_state_list: List head for Priority Inheritance (PI) state management * @pi_state_cache: Pointer to cache one PI state object per task * @exit_mutex: Mutex for serializing exit * @state: Futex handling state to handle exit races correctly */struct futex_sched_data { struct robust_list_head __user *robust_list;#ifdef CONFIG_COMPAT struct compat_robust_list_head __user *compat_robust_list;#endif struct list_head pi_state_list; struct futex_pi_state *pi_state_cache; struct mutex exit_mutex; unsigned int state;};
#ifdef CONFIG_FUTEX_PRIVATE_HASH/** * struct futex_mm_phash - Futex private hash related per MM data * @lock: Mutex to protect the private hash operations * @hash: RCU managed pointer to the private hash * @hash_new: Pointer to a newly allocated private hash * @batches: Batch state for RCU synchronization * @rcu: RCU head for call_rcu() * @atomic: Aggregate value for @hash_ref * @ref: Per CPU reference counter for a private hash */struct futex_mm_phash { struct mutex lock; struct futex_private_hash __rcu *hash; struct futex_private_hash *hash_new; unsigned long batches; struct rcu_head rcu; atomic_long_t atomic; unsigned int __percpu *ref;};#else /* CONFIG_FUTEX_ROBUST_UNLOCK */struct futex_mm_phash { };#endif /* !CONFIG_FUTEX_ROBUST_UNLOCK */
#ifdef CONFIG_FUTEX_ROBUST_UNLOCK/** * struct futex_unlock_cs_range - Range for the VDSO unlock critical section * @start_ip: The start IP of the robust futex unlock critical section (inclusive) * @len: The length of the robust futex unlock critical section * @pop_size32: Pending OP pointer size indicator. 0 == 64-bit, 1 == 32-bit */struct futex_unlock_cs_range { unsigned long start_ip; unsigned int len; unsigned int pop_size32;};
#define FUTEX_ROBUST_MAX_CS_RANGES (1 + IS_ENABLED(CONFIG_COMPAT))
/** * struct futex_unlock_cs_ranges - Futex unlock VSDO critical sections * @cs_ranges: Array of critical section ranges */struct futex_unlock_cs_ranges { struct futex_unlock_cs_range cs_ranges[FUTEX_ROBUST_MAX_CS_RANGES];};#else /* CONFIG_FUTEX_ROBUST_UNLOCK */struct futex_unlock_cs_ranges { };#endif /* !CONFIG_FUTEX_ROBUST_UNLOCK */
/** * struct futex_mm_data - Futex related per MM data * @phash: Futex private hash related data * @unlock: Futex unlock VDSO critical sections */struct futex_mm_data { struct futex_mm_phash phash; struct futex_unlock_cs_ranges unlock;};#else /* CONFIG_FUTEX */struct futex_sched_data { };struct futex_mm_data { };#endif /* !CONFIG_FUTEX */
#endif /* _LINUX_FUTEX_TYPES_H */