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Windows Driver Kit
Reference
Synchronization
 IRQL
Windows Driver Kit: Kernel-Mode Driver Architecture
IRQL
KeRaiseIrql
Raises the hardware priority to a given IRQL value, thereby masking off interrupts of equivalent or lower IRQL on the current processor.
KeRaiseIrqlToDpcLevel
Raises the hardware priority to IRQL DISPATCH_LEVEL, thereby masking off interrupts of equivalent or lower IRQL on the current processor.
KeLowerIrql
Restores the IRQL on the current processor to its original value.
KeGetCurrentIrql
Returns the current hardware priority IRQL value.


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