VOID __stdcall FsRtlPTeardownPerFileObjectContexts(_FILE_OBJECT *FileObject){
PVOID FilterContext;
FilterContext = 0i64;
IoGetFileObjectFilterContext(FileObject, &FilterContext, 0);
if( FilterContext )
{
IoChangeFileObjectFilterContext(FileObject, FilterContext, 0);
ExFreePoolWithTag(FilterContext, 0);
}
}