> If you think about it, you will see that if you are doing DMA to an > unaligned buffer, and some other unrelated part of the kernel is > accessing another part of the cache line, you are in trouble no matter > what sequence of cache flushes/invalidates/whatever you do.
I sort of assumed this was a given. I'm used to things like invalidating just 1514 bytes in a larger buffer, because I know that it's safe. However, I can agree with your sentiment, since the actual reason that I made my invalidate routine safer was because this was simpler than convincing some other programmers how to do the right thing :-) ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
