RemoveHeadList - NtDoc

#ifndef _NTRTL_H

FORCEINLINE
PLIST_ENTRY
NTAPI
RemoveHeadList(
    _Inout_ PLIST_ENTRY ListHead
    )
{
    PLIST_ENTRY Entry;
    PLIST_ENTRY NextEntry;

    Entry = ListHead->Flink;
    NextEntry = Entry->Flink;

#if !defined(NO_LIST_ENTRY_CHECKS)
    if ((Entry->Blink != ListHead) || (NextEntry->Blink != Entry)) 
    {
        RtlFatalListEntryError((PVOID)ListHead, (PVOID)Entry, (PVOID)NextEntry);
    }
#endif

    ListHead->Flink = NextEntry;
    NextEntry->Blink = ListHead;

    return Entry;
}

#endif
View code on GitHub