Re: Doubt Regarding Multithreading and Device Driver

[k8 s]

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@xxxxxxxxxxx> wrote:
> On 2005/04/27 17:05, k8 s <uint32@xxxxxxxxx> 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
> 
>
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