KeLowerIrql - NtDoc

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

VOID KeLowerIrql(
  [in] KIRQL NewIrql
);
View the official Windows Driver Kit DDI reference

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

KeLowerIrql function

Description

The KeLowerIrql routine restores the IRQL on the current processor to its original value. For information about IRQLs, see Managing Hardware Priorities.

Parameters

NewIrql [in]

Specifies the IRQL that was returned from KeRaiseIrql or KeRaiseIrqlToDpcLevel.

Remarks

It is a fatal error to call KeLowerIrql using an input NewIrql that was not returned by the immediately preceding call to KeRaiseIrql or KeRaiseIrqlToDpcLevel.

See also

KeGetCurrentIrql

KeRaiseIrql

KeRaiseIrqlToDpcLevel