__mutex_handoff

Name:Give up ownership to a specific task, when @task = NULL, this is equivalent* to a regular unlock. Sets PICKUP on a handoff, clears HANDOF, preserves* WAITERS. Provides RELEASE semantics like a regular unlock, the

Proto:static void __mutex_handoff(struct mutex *lock, struct task_struct *task)

Type:void

Parameter:

Type	Parameter	Name
struct mutex *	lock
struct task_struct *	task

226

owner = atomic_long_read( & owner)

228

cycle

236

new = owner & @owner: contains: 'struct task_struct *' to the current lock owner,* NULL means not owned. Since task_struct pointers are aligned at* at least L1_CACHE_BYTES, we have low bits to store extra state.

237

new |= task

238

If task Then new |= MUTEX_FLAG_PICKUP

241

old = atomic_long_cmpxchg_release( & owner, owner, new)

242

If old == owner Then Break

245

owner = old

**Caller**
Name	Describe
__mutex_unlock_slowpath

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Function report