__percpu_ref_switch_mode

Name:__percpu_ref_switch_mode

Proto:static void __percpu_ref_switch_mode(struct percpu_ref *ref, percpu_ref_func_t *confirm_switch)

Type:void

Parameter:

Type	Parameter	Name
struct percpu_ref *	ref
percpu_ref_func_t *	confirm_switch

225

lockdep_assert_held( & percpu_ref_switch_lock)

232

wait_event_lock_irq - sleep until a condition gets true(percpu_ref_switch_waitq, !confirm_switch, percpu_ref_switch_lock)

235

If force_atomic || * The low bit of the pointer indicates whether the ref is in percpu * mode; if set, then get/put will manipulate the atomic_t. & __PERCPU_REF_DEAD Then __percpu_ref_switch_to_atomic(ref, confirm_switch)

237

Else __percpu_ref_switch_to_percpu(ref)

**Caller**
Name	Describe
percpu_ref_switch_to_atomic	percpu_ref_switch_to_atomic - switch a percpu_ref to atomic mode@ref: percpu_ref to switch to atomic mode@confirm_switch: optional confirmation callback* There's no reason to use this function for the usual reference counting.
percpu_ref_switch_to_percpu	percpu_ref_switch_to_percpu - switch a percpu_ref to percpu mode@ref: percpu_ref to switch to percpu mode There's no reason to use this function for the usual reference counting.* To re-use an expired ref, use percpu_ref_reinit().
percpu_ref_kill_and_confirm	percpu_ref_kill_and_confirm - drop the initial ref and schedule confirmation@ref: percpu_ref to kill@confirm_kill: optional confirmation callback* Equivalent to percpu_ref_kill() but also schedules kill confirmation if*@confirm_kill is not NULL
percpu_ref_resurrect	percpu_ref_resurrect - modify a percpu refcount from dead to live@ref: perpcu_ref to resurrect Modify @ref so that it's in the same state as before percpu_ref_kill() was* called

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