I have been looking at the ethernet device driver (fcc_enet) for the mpc82xx platform. This allocates buffer descriptors using kmalloc with the GFP_DMA flag. As far as I can see on my platform, this allocates from the regular kernel memory (0xCxxxxxxx). As the attributes of this block of memory are controlled by the block address translation registers, this cannot be DMA safe, can it? Is there something I am missing here?
I am using the linuxppc-2.5 tree. Conor
