KeReleaseSpinLock macro (wdm.h)

The KeReleaseSpinLock routine releases a spin lock and restores the original IRQL at which the caller was running.

Syntax

VOID KeReleaseSpinLock(
  PKSPIN_LOCK SpinLock,
  KIRQL       NewIrql
);

Parameters

SpinLock

Pointer to a KSPIN_LOCK spin lock for which the caller provides the storage.

NewIrql

Specifies the KIRQL value saved from the preceding call to KeAcquireSpinLock.

Return value

None

Remarks

This call is a reciprocal to KeAcquireSpinLock. The input NewIrql value must be the OldIrql returned by KeAcquireSpinLock.

For more information about spin locks, see Spin Locks.

Callers of this routine are running at IRQL = DISPATCH_LEVEL. On return from KeReleaseSpinLock, IRQL is restored to the NewIrql value.

Requirements

See also

• KeAcquireSpinLock
• KeInitializeSpinLock
• Spin Locks