The KeReleaseSpinLockFromDpcLevel routine releases an executive spin lock without changing the IRQL.
VOID KeReleaseSpinLockFromDpcLevel( _Inout_ PKSPIN_LOCK SpinLock );
Drivers call KeReleaseSpinLockFromDpcLevel to release a spin lock acquired by calling KeAcquireSpinLockAtDpcLevel.
It is an error to call KeReleaseSpinLockFromDpcLevel 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.
|Windows version||Available starting with Windows 2000.|
|Header||wdm.h (include Wdm.h, Ntddk.h, Ntifs.h)|
|DDI compliance rules||HwStorPortProhibitedDDIs, IrqlDispatch, SpinLockSafe|