Re: [patch] ext2: xip check fix

Jared Hulbert wrote:
I think so. The filemap_xip.c functionality doesn't work for Flash
memory yet. Flash memory doesn't have struct pages to back it up with
which this stuff depends on.
Struct page is not the major issue. The primary problem is writing to the media (and I am not a flash expert at all, just relaying here): For some period of time, the flash memory is not usable and thus we need to make sure we can nuke the page table entries that we have in userland page tables. For that, we need a callback from the device so that it can ask to get its references back. Oh, and a put_xip_page counterpart to get_xip_page, so that the driver knows when it's safe to erase.

cheers,
Carsten
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