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    SubjectRe: [patch] cache flush bug in mm/filemap.c (all kernels >= 2.5.30(at least))
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       From: Russell King <rmk@arm.linux.org.uk>
    Date: Mon, 26 May 2003 09:55:51 +0100

    Ok, so the flush_dcache_page() interface looses this; the original
    placement of the flush_page_to_ram() ensured that data written by
    device drivers was visible to user space.

    That's possible, but see my response to Roman's posting for how
    this can be easily fixed using current interfaces yet retaining
    identical or even potentially better performance.
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