From: sridhar vaidyanathan <sridharv@ufl.edu>
To: linux-kernel@vger.kernel.org
Subject: /dev/raw and /dev/mem
Date: Mon, 2 Jun 2003 16:32:54 -0400 [thread overview]
Message-ID: <1054585974.3edbb476325aa@webmail.health.ufl.edu> (raw)
I attempetd to transfer data from a raw char device to a buffer allocated by
mmaping /dev/mem. But the operation failed with 'Bad Address'.Upon a bit of
investigation I found that VM_IO flag is set in the mmaped pages.get_user_pages
() which is called by the raw character driver doesn't like this.I am not very
clear about the reason.
Is it not possible to do this?
-sridhar
ps: email me as i am not subscribed.
reply other threads:[~2003-06-02 20:19 UTC|newest]
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