KefReleaseSpinLockFromDpcLevel - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
// wdm.h

VOID KefReleaseSpinLockFromDpcLevel(
  [in, out] PKSPIN_LOCK SpinLock
);
View the official Windows Driver Kit DDI reference

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Windows Driver Kit DDI reference (nf-wdm-kefreleasespinlockfromdpclevel)

Description

The KefReleaseSpinLockFromDpcLevel routine releases an executive spin lock without changing the IRQL.

Parameters

SpinLock [in, out]

Pointer to an executive spin lock for which the caller provides the storage.

Remarks

Drivers call KefReleaseSpinLockFromDpcLevel to release a spin lock acquired by calling KeAcquireSpinLockAtDpcLevel.

It is an error to call KefReleaseSpinLockFromDpcLevel if the specified spin lock was acquired by calling KeAcquireSpinLock because the caller's original IRQL is not restored, which can cause deadlocks or fatal page faults.

For more information about spin locks, see Spin Locks.

See also

View the official Windows Driver Kit DDI reference

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