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Date: Fri, 20 Jul 2007 11:58:38 -0500
From: Scott Wood <scottwood@freescale.com>
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To: Misbah khan <misbah_khan@engineer.com>
Subject: Re: Kmalloc returns which address
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Misbah khan wrote:
> hi Suresh
> 
> In linux kmelloc returns the pointer to virtual address not the physical
> address, to return to the physical address there is different function
> called ioremap 
> 
> for eg :-
> char *buf_tx =kmalloc(100,GFP_KERNEL); // Tx buffer
> char *buf_rx=kmalloc(100,GFP_KERNEL); // Rx buffer
> 
> ptr_tx=ioremap( buf_tx,100);
> ptr_rx=ioremap(buf_rx,100);

That's a really easy way to cause a machine check.

-Scott