From: Brian Gerst <bgerst@didntduck.org>
To: blesson paul <blessonpaul@msn.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: put_user_byte()
Date: Thu, 11 Apr 2002 07:01:25 -0400 [thread overview]
Message-ID: <3CB56D05.6040702@didntduck.org> (raw)
In-Reply-To: <F38uSbh29cM3oryKFRJ00031d09@hotmail.com>
blesson paul wrote:
> Hi all
> I need to copy some data from kernel memory space to user
> memory space. When I investigated, the command for that purpose is
> put_user_byte(). But in kernel2.4, I can't find the implementation of
> this command. I want to know the command which replaced put_user_byte()
> in 2.4 kernel. Also I want to know whether there is any synonyms for
> verify_area() in kernel 2.4
> regards
> Blesson Paul
Use put_user(val, uaddr). val must be of type unsigned char (or casted
to it). It will return 0 on success or -EFAULT on fault. verify_area()
is normally not needed in 2.4, unless you are copying many values to
user space and only want to do the priviledge check once on the whole range.
--
Brian Gerst
next prev parent reply other threads:[~2002-04-11 11:03 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-04-11 5:54 put_user_byte() blesson paul
2002-04-11 11:01 ` Brian Gerst [this message]
2002-04-13 8:57 ` put_user_byte() Russell King
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