Re: fuse, get_user_pages, flush_anon_page, aliasing caches and all that again

[Randolph Chung <randolph@tausq.org>]

> I understand now.  I'm not sure how the PARISC implementation can be
> correct in this light.

According to cachetlb.txt:

  void flush_anon_page(struct page *page, unsigned long vmaddr)
        When the kernel needs to access the contents of an anonymous
        page, it calls this function (currently only
        get_user_pages()).  Note: flush_dcache_page() deliberately
        doesn't work for an anonymous page.  The default
        implementation is a nop (and should remain so for all coherent
        architectures).  For incoherent architectures, it should flush
        the cache of the page at vmaddr in the current user process.
                                               ^^^^^^^^^^^^^^^^^^^^

Is the documentation wrong?

randolph
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