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

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Message-Id: <1166718582.3365.1509.camel@laptopd505.fenrus.org>
Date:	Thu, 21 Dec 2006 17:29:42 +0100
From:	Arjan van de Ven <arjan@...radead.org>
To:	Russell King <rmk+lkml@....linux.org.uk>
Cc:	Linux Kernel List <linux-kernel@...r.kernel.org>,
	linux-arch <linux-arch@...r.kernel.org>,
	Miklos Szeredi <miklos@...redi.hu>
Subject: Re: fuse, get_user_pages, flush_anon_page, aliasing caches and all
	that again


> So, given all this additional complexity _and_ that it would only be
> safe on non-preempt UP, the question becomes: is using get_user_pages()
> to access the current processes memory space legal?  Given the above,
> I would say not.

I'd say that copy_from_user is the right api for this, not
get_user_pages + kmap hacks...


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