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IoMmuUnmapWorker() is identical to IoMmuUnmap(), it just takes an additional BOOLEAN parameter called "MemoryMapLocked". If the memory map is locked, IoMmuUnmapWorker() does its usual job, but it purposely leaks memory rather than freeing it. This makes it callable from ExitBootServices() context. Turn IoMmuUnmap() into a thin wrapper around IoMmuUnmapWorker() that passes constant FALSE for "MemoryMapLocked". Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Brijesh Singh <brijesh.singh@amd.com> Cc: Jiewen Yao <jiewen.yao@intel.com> Cc: Jordan Justen <jordan.l.justen@intel.com> Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Jiewen Yao <jiewen.yao@intel.com> Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Brijesh Singh <brijesh.singh@amd.com> Tested-by: Brijesh Singh <brijesh.singh@amd.com>