Messages in this thread | | | Subject | Re: [PATCH 1 of 2] block_page_mkwrite() Implementation V2 | From | David Woodhouse <> | Date | Wed, 16 May 2007 20:09:19 +0800 |
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On Wed, 2007-05-16 at 11:19 +0100, David Howells wrote: > The start and end points passed to block_prepare_write() delimit the region of > the page that is going to be modified. This means that prepare_write() > doesn't need to fill it in if the page is not up to date.
Really? Is it _really_ going to be modified? Even if the pointer userspace gave to write() is bogus, and is going to fault half-way through the copy_from_user()?
-- dwmw2
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