From: Scott Wood <scottwood@freescale.com>
To: Misbah khan <misbah_khan@engineer.com>
Cc: linuxppc-embedded@ozlabs.org
Subject: Re: Kmalloc returns which address
Date: Fri, 20 Jul 2007 11:58:38 -0500 [thread overview]
Message-ID: <46A0E9BE.4020305@freescale.com> (raw)
In-Reply-To: <11705981.post@talk.nabble.com>
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
next prev parent reply other threads:[~2007-07-20 16:58 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-16 13:59 Kmalloc returns which address suresh suresh
2007-07-16 15:46 ` Scott Wood
2007-07-23 3:47 ` Misbah khan
2007-07-23 18:35 ` Scott Wood
2007-07-24 7:03 ` Misbah khan
2007-07-20 10:52 ` Misbah khan
2007-07-20 16:58 ` Scott Wood [this message]
2007-07-20 12:13 ` Alessandro Rubini
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