Highmem issues with MMC filesystem

[saeed bishara]

> In no case does the kernel ever clean user space cache lines for DMA;
> that's not the responsibility of the DMA API.
I understand that it's not the DMA API's responsibility to flush user
space cache lines, but other parts of the kernel should do that right?
otherwise DIRECT_IO won't work (though the issue here has nothing to
do with DIRECT_IO).

saeed