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Index of /anon_sym/anon/proc/thread-self/root/lib/modules/5.14.0-687.29.1.el9_8.x86_64/source/fs/btrfs
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0 +
q̾ +#ifndef _LINUX_MMAP_LOCK_H
#define _LINUX_MMAP_LOCK_H
#include
#include
#include
#include
#include
#include
#include
#define MMAP_LOCK_INITIALIZER(name) \
.mmap_lock = __RWSEM_INITIALIZER((name).mmap_lock),
DECLARE_TRACEPOINT(mmap_lock_start_locking);
DECLARE_TRACEPOINT(mmap_lock_acquire_returned);
DECLARE_TRACEPOINT(mmap_lock_released);
#ifdef CONFIG_TRACING
void __mmap_lock_do_trace_start_locking(struct mm_struct *mm, bool write);
void __mmap_lock_do_trace_acquire_returned(struct mm_struct *mm, bool write,
bool success);
void __mmap_lock_do_trace_released(struct mm_struct *mm, bool write);
static inline void __mmap_lock_trace_start_locking(struct mm_struct *mm,
bool write)
{
if (tracepoint_enabled(mmap_lock_start_locking))
__mmap_lock_do_trace_start_locking(mm, write);
}
static inline void __mmap_lock_trace_acquire_returned(struct mm_struct *mm,
bool write, bool success)
{
if (tracepoint_enabled(mmap_lock_acquire_returned))
__mmap_lock_do_trace_acquire_returned(mm, write, success);
}
static inline void __mmap_lock_trace_released(struct mm_struct *mm, bool write)
{
if (tracepoint_enabled(mmap_lock_released))
__mmap_lock_do_trace_released(mm, write);
}
#else /* !CONFIG_TRACING */
static inline void __mmap_lock_trace_start_locking(struct mm_struct *mm,
bool write)
{
}
static inline void __mmap_lock_trace_acquire_returned(struct mm_struct *mm,
bool write, bool success)
{
}
static inline void __mmap_lock_trace_released(struct mm_struct *mm, bool write)
{
}
#endif /* CONFIG_TRACING */
static inline void mmap_assert_locked(struct mm_struct *mm)
{
lockdep_assert_held(&mm->mmap_lock);
VM_BUG_ON_MM(!rwsem_is_locked(&mm->mmap_lock), mm);
}
static inline void mmap_assert_write_locked(struct mm_struct *mm)
{
lockdep_assert_held_write(&mm->mmap_lock);
VM_BUG_ON_MM(!rwsem_is_locked(&mm->mmap_lock), mm);
}
#ifdef CONFIG_PER_VMA_LOCK
static inline void mm_lock_seqcount_init(struct mm_struct *mm)
{
seqcount_init(&mm->mm_lock_seq);
}
static inline void mm_lock_seqcount_begin(struct mm_struct *mm)
{
do_raw_write_seqcount_begin(&mm->mm_lock_seq);
}
static inline void mm_lock_seqcount_end(struct mm_struct *mm)
{
ASSERT_EXCLUSIVE_WRITER(mm->mm_lock_seq);
do_raw_write_seqcount_end(&mm->mm_lock_seq);
}
static inline bool mmap_lock_speculate_try_begin(struct mm_struct *mm, unsigned int *seq)
{
/*
* Since mmap_lock is a sleeping lock, and waiting for it to become
* unlocked is more or less equivalent with taking it ourselves, don't
* bother with the speculat