Re: Read and write by a module

["George Chang" <h9916628@hkusua.hku.hk>]

Hi all,

I have read the book but it seems not useful for file operation in kernel
mdoule. I have completed a read and write part for module. But dont know why
the system will hang up when reading  and writing the file for more than 3
times.

Could anyone tell me the procedures for file operation in kernel, e.g. do I
need spin_locks() first ?
I think another problem is the declaration of char array. I use char *temp=
kmalloc(50, GFP_KERNEL), is it correct? I guess the hang-up problem may be
due to the null pointer dereference .

Anyone knows about installation and configuration of SGI KDB kernel
debugger?

Thanks

George

----- Original Message -----
From: "Andre Heine" <linux-experience@gmx.net>
To: <linux-kernel@vger.kernel.org>
Sent: Thursday, March 27, 2003 10:09 PM
Subject: Re: Read and write by a module


> Hi,
>
> From: "h9916628" <h9916628@hkusua.hku.hk>
> > Please help! I have to read and write cotents from a file by a module.
Could
> > anyone tell me the procedures or advise me? This is very urgent to me.
Thanks
>
> On www.oreilly.com is an "free Book", called Linux Device Driver, Author
A.Rubini.
>
> This book describe the basic about writing modules & systemcalls ...
>
> There also many tutorial in the web
>
> Bye
>
> Andre
>
>
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