From: k8 s <uint32@gmail.com>
To: k8 s <uint32@gmail.com>, linux-kernel@vger.kernel.org
Subject: Re: Doubt Regarding Multithreading and Device Driver
Date: Wed, 27 Apr 2005 21:00:58 +0530 [thread overview]
Message-ID: <699a19ea05042708305fb7194b@mail.gmail.com> (raw)
In-Reply-To: <20050427151040.GA5717@roonstrasse.net>
But i am sharing something in file->private_data which is a private
variable to the process(that is passed to the device driver
functions). Isn't it?
SK
On 4/27/05, Max Kellermann <max@duempel.org> wrote:
> On 2005/04/27 17:05, k8 s <uint32@gmail.com> wrote:
> > I am storing something into struct file*filp->private_data.
> > As this is not shared across processes I am not doing any locking
> > stuff while accessing or putting anything into it.
>
> You're talking about kernel variables, aren't you? Kernel memory is
> shared among all processes, i.e. you _do_ need locking.
>
> Max
>
>
next prev parent reply other threads:[~2005-04-27 15:31 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-04-27 15:05 k8 s
2005-04-27 15:10 ` Max Kellermann
2005-04-27 15:30 ` k8 s [this message]
2005-04-27 15:41 ` Paulo Marques
2005-04-27 15:46 ` Al Viro
2005-04-27 15:34 ` Richard B. Johnson
2005-04-27 15:34 ` Jonathan Corbet
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