queue_lock

Name:The key must be already stored in q->key.

Proto:static inline struct futex_hash_bucket *queue_lock(struct futex_q *q)__acquires(&hb->lock)

Type:struct futex_hash_bucket

Parameter:

Type	Parameter	Name
struct futex_q *	q

2304

hb = 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.

2314

Reflects a new waiter being added to the waitqueue.

2316

lock_ptr = lock

2318

spin_lock( & lock)

2319

Return hb

**Caller**
Name	Describe
futex_wait_setup	ex_wait_setup() - Prepare to wait on a futex@uaddr: the futex userspace address@val: the expected value@flags: futex flags (FLAGS_SHARED, etc.)@q: the associated futex_q*@hb: storage for hash_bucket pointer to be returned to caller
futex_lock_pi	Userspace tried a 0 -> TID atomic transition of the futex value* and failed. The kernel side here does the whole locking operation:* if there are waiters then it will block as a consequence of relying* on rt-mutexes, it does PI, etc

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