Hi all,
while trying to understand the meaning of the net_device flag NETIF_F_HIGHDMA I came across the function illegal_highdma() which seems to perform two tasks: 1. Check if a network interface is able to handle high memory pages 2. Check if a network interface is able to handle the resulting DMA addresses What I dont understand is why both conditions are only checked if CONFIG_HIGHMEM is set. For 1. this makes sense, of course. But why is 2. also only checked with CONFIG_HIGHMEM? Should not 2. always be checked, regardless of whether high memory exists in the system or not? Thanks for any enlightenment in advance! Regards, Lino
