// wdm.h

VOID ExReleaseSpinLockExclusiveFromDpcLevel(
  PEX_SPIN_LOCK SpinLock
);
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Windows Driver Kit DDI reference (nf-wdm-exreleasespinlockexclusivefromdpclevel)

Description

The ExReleaseSpinLockExclusiveFromDpcLevel routine releases a spin lock that the caller acquired for exclusive access, and leaves the IRQL unchanged.

Parameters

`SpinLock`

[in, out] A pointer to the spin lock to release. The caller must own this spin lock for exclusive access.

Remarks

On entry to this routine, the caller must be running at IRQL >= DISPATCH_LEVEL. This routine does not change the IRQL.

ExReleaseSpinLockExclusiveFromDpcLevel releases a spin lock that the caller acquired in a previous call to the ExAcquireSpinLockExclusiveAtDpcLevel routine.

The caller should hold the spin lock only briefly before releasing it. For more information, see Introduction to Spin Locks.