add note describing why dma mem alloc needs more work

diff --git a/rumpxenpci/dev/lib/libpci/hyper.h b/rumpxenpci/dev/lib/libpci/hyper.h
index e7f55daa2bf6e9b9d493783100173531970cd7c2..c33c68d5a99015b4dbc7c26cb19e3acb155c07d7 100644 (file)
--- a/rumpxenpci/dev/lib/libpci/hyper.h
+++ b/rumpxenpci/dev/lib/libpci/hyper.h
@@ -4,6 +4,7 @@ int rumpcomp_pci_confwrite(unsigned, unsigned, unsigned, int, unsigned int);
 
 void *rumpcomp_pci_irq_establish(int, int (*)(void *), void *);
 
+/* XXX: needs work: support boundary-restricted allocations */
 int rumpcomp_pci_dmalloc(size_t, size_t, unsigned long *);
 
 void *rumpcomp_pci_mach_to_virt(unsigned long);