函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\futex.c Create Date:2022-07-27 11:53:24
Last Modify:2020-03-17 15:28:32 Copyright©Brick
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函数名称：hash_futex - Return the hash bucket in the global hash*@key: Pointer to the futex key for which the hash is calculated* We hash on the keys returned from get_futex_key (see below) and return the* corresponding hash bucket in the global hash.

函数原型：static struct futex_hash_bucket *hash_futex(union futex_key *key)

返回类型：struct futex_hash_bucket

参数：

类型参数名称
union futex_key *key
388  hash等于jhash2 - hash an array of u32's*@k: the key which must be an array of u32's*@length: the number of u32's in the key*@initval: the previous hash, or an arbitray value* Returns the hash value of the key.
391  返回:futex_queues[hash & (futex_hashsize - 1)]
调用者
名称描述
futex_wakeWake up waiters matching bitset queued on this futex (uaddr).
futex_wake_opWake up all waiters hashed on the physical page that is mapped* to this virtual address:
futex_requeueex_requeue() - Requeue waiters from uaddr1 to uaddr2*@uaddr1: source futex user address*@flags: futex flags (FLAGS_SHARED, etc
queue_lockThe key must be already stored in q->key.
futex_unlock_piUserspace attempted a TID -> 0 atomic transition, and failed.* This is the in-kernel slowpath: we look up the PI state (if any),* and do the rt-mutex unlock.